You Should Know About Needle Roller Bearings

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You Should Know About Needle Roller Bearings

Needle bearings are roller bearings with cylindrical rollers that are thin and long relative to their diameter. Although the roller has a smaller cross-section, it still has a higher load-bearing capacity. Needle roller bearings are equipped with thin and l ong rollers (roller diameter D≤5mm, L/D≥2.5, L is the roller length), Therefore, the radial structure is compact. When the inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest. It is especially suitable for support structures with limited radial installation dimensions.

Depending on the use occasion, a needle roller and cage assembly without an inner ring can be selected. At this time, the journal surface and shell hole surface matching the bearing directly serve as the inner and outer rolling surfaces of the bearing. In order to ensure that the load capacity and running performance are the same as those of bearings with rings, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or housing hole should be similar to the raceway of the bearing ring. This kind of bearing can only bear radial load. In addition to those listed in the catalog, bearings that can be used for general engineering, such as: open drawn cup needle roller bearings, closed drawn cup needle roller bearings, needle roller bearings with inner ring and needle roller bearings without inner ring/no inner ring Cageless needle roller bearings, caged and cageless needle roller bearings.

Table of Contents

Types of needle roller bearings

Stamped outer ring needle roller bearings

Stamped outer ring needle roller bearings have no inner ring and are available in two types: perforated type and sealed type. The needle roller is in direct contact with the surface of the shaft, so the machining accuracy and heat treatment hardness of the shaft should be the same as the bearing inner ring. Its main feature is that the cross-section height is very low and the load-bearing capacity is high. It is mainly used for bearing configurations that are compact in structure, cheap in price, and the inner hole of the bearing box cannot be used as the raceway of the needle roller cage assembly.

Application: Stamped outer ring needle roller bearings with cages are suitable for high speed and heavy load. They are mostly used in gearboxes of machine tools, automobiles, motorcycles or textile machinery. Cageless stamped ring needle roller bearings are filled with needle rollers and are suitable for oscillating working conditions under heavy loads. Such as the frame of an aircraft, the shaft end of a missile’s main wing, etc.

Part Number	Seal Type	Bore Dia	Outer Dia	Width	Ring Material	Needle Material	Shaft Mount Type	Temperature Range	Weight
1WC0608	Open	6 mm	10 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	2 g
1WC0612	Open	6 mm	10 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3 g
1WC0812	Open	8 mm	14.2 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	7 g
1WC0815	Open	8 mm	14.2 mm	14.5 mm	Steel	Steel	Press Fit	-30° to 110 °C	8 g
1WC1012	Open	10 mm	16 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	8 g
1WC1216	Open	12 mm	18 mm	16 mm	Steel	Steel	Press Fit	-30° to 110 °C	12 g
EWC0406A	Open	4 mm	8 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
EWC0406C	Open	4 mm	8 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
EWC0606XC	Open	6 mm	10 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.4 g
EWC0608A	Open	6 mm	10 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.7 g
EWC0608C	Open	6 mm	10 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.7 g
EWC0608XA	Open	6 mm	10 mm	7.5 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.7 g
EWC0608XC	Open	6 mm	10 mm	7.5 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.7 g
EWC0809A	Open	8 mm	12 mm	9 mm	Steel	Steel	Press Fit	-30° to 110 °C	2.4 g
EWC0809C	Open	8 mm	12 mm	9 mm	Steel	Steel	Press Fit	-30° to 110 °C	2.4 g
EWC0812A	Open	8 mm	14.2 mm	15 mm	Steel	Steel	Press Fit	-30° to 110 °C	5.8 g
EWC0812C	Open	8 mm	14.2 mm	15 mm	Steel	Steel	Press Fit	-30° to 110 °C	5.8 g
EWC1010A	Open	10 mm	16 mm	17 mm	Steel	Steel	Press Fit	-30° to 110 °C	6 g
EWC1010C	Open	10 mm	16 mm	17 mm	Steel	Steel	Press Fit	-30° to 110 °C	6 g
EWC1012A	Open	10 mm	16 mm	17 mm	Steel	Steel	Press Fit	-30° to 110 °C	6.8 g
EWC1012C	Open	10 mm	16 mm	17 mm	Steel	Steel	Press Fit	-30° to 110 °C	6.8 g
HF0306-KF	Open	3 mm	6.5 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
HF0306-KF-R	Open	3 mm	6.5 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
HF0406-KF	Open	4 mm	8 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
HF0406-KF-R	Open	4 mm	8 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
HF0612	Open	6 mm	10 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3 g
HF0612-KF	Open	6 mm	10 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3 g
HF0612-KF-R	Open	6 mm	10 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3 g
HF0612-R	Open	6 mm	10 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3 g
HF0812	Open	8 mm	12 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3.5 g
HF0812-KF	Open	8 mm	12 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3.5 g
HF0812-KF-R	Open	8 mm	12 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3.5 g
HF0812-R	Open	8 mm	12 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	3.5 g
HF1012	Open	10 mm	14 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	4 g
HF1012-KF	Open	10 mm	14 mm	12 mm	Steel	Steel	Press Fit	-30° to 110 °C	4 g
HF1216	Open	12 mm	18 mm	16 mm	Steel	Steel	Press Fit	-30° to 110 °C	11 g
HF1416	Open	14 mm	20 mm	16 mm	Steel	Steel	Press Fit	-30° to 110 °C	13 g
HF1616	Open	16 mm	22 mm	16 mm	Steel	Steel	Press Fit	-30° to 110 °C	14 g
HF1816	Open	18 mm	24 mm	16 mm	Steel	Steel	Press Fit	-30° to 110 °C	16 g
HF2016	Open	20 mm	26 mm	16 mm	Steel	Steel	Press Fit	-30° to 110 °C	17 g
HF2520	Open	25 mm	32 mm	20 mm	Steel	Steel	Press Fit	-30° to 110 °C	30 g
HF3020	Open	30 mm	37 mm	20 mm	Steel	Steel	Press Fit	-30° to 110 °C	36 g
HF3520	Open	35 mm	42 mm	20 mm	Steel	Steel	Press Fit	-30° to 110 °C	40 g
HFL0308-KF	Open	3 mm	6.5 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.4 g
HFL0308-KF-R	Open	3 mm	6.5 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.4 g
HFL0408-KF	Open	4 mm	8 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.6 g
HFL0408-KF-R	Open	4 mm	8 mm	8 mm	Steel	Steel	Press Fit	-30° to 110 °C	1.6 g
HFL0606-KF-R	Open	6 mm	10 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	1 g
HFL0615	Open	6 mm	10 mm	15 mm	Steel	Steel	Press Fit	-30° to 110 °C	4 g
HFL0615-KF	Open	6 mm	10 mm	15 mm	Steel	Steel	Press Fit	-30° to 110 °C	4 g
HFL0615-KF-R	Open	6 mm	10 mm	15 mm	Steel	Steel	Press Fit	-30° to 110 °C	4 g
HFL0615-R	Open	6 mm	10 mm	15 mm	Steel	Steel	Press Fit	-30° to 110 °C	4 g
HFL0806-KF-R	Open	8 mm	12 mm	6 mm	Steel	Steel	Press Fit	-30° to 110 °C	2 g
HFL0822	Open	8 mm	12 mm	22 mm	Steel	Steel	Press Fit	-30° to 110 °C	7 g
HFL0822-KF	Open	8 mm	12 mm	22 mm	Steel	Steel	Press Fit	-30° to 110 °C	7 g
HFL0822-KF-R	Open	8 mm	12 mm	22 mm	Steel	Steel	Press Fit	-30° to 110 °C	7 g
HFL0822-R	Open	8 mm	12 mm	22 mm	Steel	Steel	Press Fit	-30° to 110 °C	7 g
HFL1022	Open	10 mm	14 mm	22 mm	Steel	Steel	Press Fit	-30° to 110 °C	8 g
HFL1226	Open	12 mm	18 mm	26 mm	Steel	Steel	Press Fit	-30° to 110 °C	18 g
HFL1426	Open	14 mm	20 mm	26 mm	Steel	Steel	Press Fit	-30° to 110 °C	20 g
HFL1626	Open	16 mm	22 mm	26 mm	Steel	Steel	Press Fit	-30° to 110 °C	22 g
HFL1826	Open	18 mm	24 mm	26 mm	Steel	Steel	Press Fit	-30° to 110 °C	25 g
HFL2026	Open	20 mm	26 mm	26 mm	Steel	Steel	Press Fit	-30° to 110 °C	27 g
HFL2530	Open	25 mm	32 mm	30 mm	Steel	Steel	Press Fit	-30° to 110 °C	44 g
HFL3030	Open	30 mm	37 mm	30 mm	Steel	Steel	Press Fit	-30° to 110 °C	51 g
HFL3530	Open	35 mm	42 mm	30 mm	Steel	Steel	Press Fit	-30° to 110 °C	58 g

Solid ring needle roller bearings.

Solid ring needle roller bearings are composed of one or two rings and a needle roller group with a cage. Depending on the application, it can be divided into bearings with or without inner rings. NA and NKI type bearings without inner rings are RNA and NK type needle roller bearings. This kind of bearing has no inner ring and is suitable for support structures with limited radial installation size. The journal matching the bearing directly serves as the rolling surface. As the raceway surface, the shaft must be hardened and ground, and only when it is processed to appropriate size and shape accuracy can the entire set of needle roller bearings have a higher service life and operating accuracy.

Application: Mostly used in machine tools and automobile gearboxes. Its advantages are small radial cross-section size and large radial load. Standard solid ring needle roller bearings have cages, so the rotation speed is high and can adapt to the requirements of machine tools and gearboxes.

Combined needle roller bearing

The combined needle roller bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component. It has a compact structure, small size, and high rotation accuracy. It can withstand high radial loads and a certain axial load at the same time. The needle roller and cage assembly is a separate bearing element. Each needle is precisely guided and secured by a cage. It has the highest load-bearing capacity and high rigidity design in the smallest structure and space. The large distance between the two guide surfaces of the cage ensures precise guidance of the needle roller and cage assembly. Needle roller cage assemblies are suitable when the shaft and housing bore are used as raceways.

Thrust needle roller bearing

Thrust needle roller bearings consist of a thrust cage assembly with needle rollers or cylindrical rollers or balls and a thrust washer. The needle rollers and cylindrical rollers are held and guided by thrust cages. When used with different series of DF thrust bearing washers, many different combinations of bearing configurations are available.

Needle roller and cage assembly.

The needle roller and cage assembly is actually a needle roller bearing without a ferrule. Scope of application: It is mostly used in the large and small ends of connecting rods in automobiles and motorcycles. Since the temperature inside the air box rises, the bearings must withstand high temperatures.

Part Number	Bearing Type	Bore Dia	Outer Dia	Width	Needle Material	Dynamic Radial Load	Static Radial Load	Max Speed (X1000 rpm)	Weight
C060806	Needle	0.375″	0.5″	0.375″	Steel	899 lbf	944 lbf	30	2.5 g
C081008	Needle	0.5″	0.625″	0.5″	Steel	1484 lbf	1956 lbf	26	4.2 g
C091108	Needle	0.5625″	0.688″	0.625″	Steel	1641 lbf	2293 lbf	25	5.9 g
C091110	Needle	0.5625″	0.688″	0.625″	Steel	2203 lbf	3372 lbf	25	5.9 g
C101208	Needle	0.625″	0.75″	0.5″	Steel	1843 lbf	2765 lbf	24	5.2 g
C121616	Needle	0.75″	1″	1″	Steel	562 lbf	7756 lbf	21.2	26.4 g
C141816	Needle	0.875″	1.125″	1″	Steel	6519 lbf	9779 lbf	19.3	30.1 g
C162112	Needle	1″	1.313″	0.75″	Steel	6407 lbf	8543 lbf	16.7	32.6 g
C162116	Needle	1″	1.313″	1″	Steel	8206 lbf	11915 lbf	16.7	43.5 g
C182416	Needle	1.125″	1.5″	1″	Steel	9667 lbf	13489 lbf	14.7	59.3 g
C182420	Needle	1.125″	1.5″	1.25″	Steel	1169 lbf	17085 lbf	15	74.1 g
C202616	Needle	1.25″	1.625″	1″	Steel	10116 lbf	14613 lbf	13.4	64.9 g
C202812	Needle	1.25″	1.75″	0.75″	Steel	9779 lbf	1169 lbf	12.9	67.8 g
C222820	Needle	1.375″	1.75″	1.25″	Steel	12589 lbf	19783 lbf	12.3	88.2 g
C243016	Needle	1.5″	1.875″	1″	Steel	10791 lbf	16636 lbf	11.4	76.2 g
C243024	Needle	1.5″	1.875″	1.5″	Steel	15287 lbf	26078 lbf	11.4	114.3 g
C364216	Needle	2.25″	2.625″	1″	Steel	13489 lbf	25179 lbf	7.9	110.1 g
C404616	Needle	2.5″	2.875″	1″	Steel	13938 lbf	27202 lbf	7.2	121.4 g
C485424	Needle	3″	3.375″	1.5″	Steel	21132 lbf	49233 lbf	6.1	216 g
K100X107X21	Needle	100 mm	107 mm	21 mm	Steel	10791 lbf	28551 lbf	4.8	120 g
K100X108X27	Needle	100 mm	108 mm	27 mm	Steel	12814 lbf	32148 lbf	4.7	185 g
K100X108X30	Needle	100 mm	108 mm	30 mm	Steel	15961 lbf	42264 lbf	4.7	180 g
K105X112X21	Needle	105 mm	112 mm	21 mm	Steel	10678 lbf	28551 lbf	4.5	129 g
K10X13X10-TV	Needle	10 mm	13 mm	10 mm	Steel	1068 lbf	1236 lbf	29.5	1.6 g
K10X13X13-TV	Needle	10 mm	13 mm	13 mm	Steel	1394 lbf	1754 lbf	29.5	2.3 g
K10X13X16-TV	Needle	10 mm	13 mm	16 mm	Steel	1596 lbf	2091 lbf	29.5	2.9 g
K10X14X10-TV	Needle	10 mm	14 mm	10 mm	Steel	1304 lbf	1349 lbf	29	2.5 g
K10X14X13-TV	Needle	10 mm	14 mm	13 mm	Steel	1686 lbf	1888 lbf	29	4.6 g
K10X16X12-TV	Needle	10 mm	16 mm	12 mm	Steel	1821 lbf	1619 lbf	27.5	5.5 g
K110X117X24	Needle	110 mm	117 mm	24 mm	Steel	12589 lbf	3552 lbf	4.3	172 g
K110X118X30	Needle	110 mm	118 mm	30 mm	Steel	17535 lbf	49233 lbf	4.3	217 g
K115X123X27	Needle	115 mm	123 mm	27 mm	Steel	14163 lbf	38218 lbf	4.1	200 g
K120X127X24	Needle	120 mm	127 mm	24 mm	Steel	13264 lbf	39117 lbf	4	165 g
K125X133X35	Needle	125 mm	133 mm	35 mm	Steel	19334 lbf	5845 lbf	3.8	275 g
K12X15X10-TV	Needle	12 mm	15 mm	10 mm	Steel	1102 lbf	1371 lbf	27	2.9 g
K12X15X13-TV	Needle	12 mm	15 mm	13 mm	Steel	1439 lbf	1911 lbf	27	2.3 g
K12X16X13-TV	Needle	12 mm	16 mm	13 mm	Steel	1798 lbf	2113 lbf	26.5	3.6 g
K12X17X13-TV	Needle	12 mm	17 mm	13 mm	Steel	2158 lbf	2338 lbf	26.5	4.9 g
K12X18X12-TV	Needle	12 mm	18 mm	12 mm	Steel	2248 lbf	2226 lbf	26	6 g
K130X137X24	Needle	130 mm	137 mm	24 mm	Steel	13713 lbf	41814 lbf	3.7	170 g
K135X143X35	Needle	135 mm	143 mm	35 mm	Steel	20458 lbf	65195 lbf	3.6	300 g
K145X153X26	Needle	145 mm	153 mm	26 mm	Steel	16636 lbf	50582 lbf	3.3	262 g
K14X18X10	Needle	14 mm	18 mm	10 mm	Steel	1596 lbf	1911 lbf	25	4 g
K14X18X13	Needle	14 mm	18 mm	13 mm	Steel	1843 lbf	2271 lbf	25	6.5 g
K14X18X15-TV	Needle	14 mm	18 mm	15 mm	Steel	2136 lbf	2765 lbf	25	5 g
K14X18X17	Needle	14 mm	18 mm	17 mm	Steel	2428 lbf	3237 lbf	25	8 g
K14X20X12	Needle	14 mm	20 mm	12 mm	Steel	2316 lbf	2383 lbf	24.3	8.5 g
K150X160X46	Needle	150 mm	160 mm	46 mm	Steel	33047 lbf	10566 lbf	3.2	570 g
K155X163X26	Needle	155 mm	163 mm	26 mm	Steel	16861 lbf	53055 lbf	3.1	265 g
K15X18X17-TV	Needle	15 mm	18 mm	17 mm	Steel	1798 lbf	272 lbf	24.6	4.6 g
K15X19X10	Needle	15 mm	19 mm	10 mm	Steel	1686 lbf	2068 lbf	24.3	5 g
K15X19X13	Needle	15 mm	19 mm	13 mm	Steel	1911 lbf	245 lbf	24.3	7 g
K15X19X17	Needle	15 mm	19 mm	17 mm	Steel	254 lbf	3507 lbf	24.3	9.5 g
K15X20X13	Needle	15 mm	20 mm	13 mm	Steel	2226 lbf	2585 lbf	23.9	7 g
K15X21X15	Needle	15 mm	21 mm	15 mm	Steel	3215 lbf	3687 lbf	23.6	11 g
K15X21X21	Needle	15 mm	21 mm	21 mm	Steel	4361 lbf	5463 lbf	23.6	17 g
K160X170X46	Needle	160 mm	170 mm	46 mm	Steel	34171 lbf	114653 lbf	3	550 g
K165X173X26	Needle	165 mm	173 mm	26 mm	Steel	1821 lbf	59574 lbf	2.9	320 g
K16X20X10	Needle	16 mm	20 mm	10 mm	Steel	1754 lbf	2226 lbf	23.6	5.5 g
K16X20X13	Needle	16 mm	20 mm	13 mm	Steel	2001 lbf	2653 lbf	23.6	7.5 g
K16X20X17	Needle	16 mm	20 mm	17 mm	Steel	263 lbf	3777 lbf	23.6	10 g
K16X22X12	Needle	16 mm	22 mm	12 mm	Steel	2585 lbf	281 lbf	22.9	10 g
K16X22X16	Needle	16 mm	22 mm	16 mm	Steel	3327 lbf	3934 lbf	22.9	12 g
K16X22X20	Needle	16 mm	22 mm	20 mm	Steel	4114 lbf	5126 lbf	22.9	17 g
K16X24X20	Needle	16 mm	24 mm	20 mm	Steel	4811 lbf	5283 lbf	22.4	22 g
K175X183X32	Needle	175 mm	183 mm	32 mm	Steel	22256 lbf	78683 lbf	2.8	400 g
K17X21X10	Needle	17 mm	21 mm	10 mm	Steel	1821 lbf	2383 lbf	22.9	5.5 g
K17X21X13	Needle	17 mm	21 mm	13 mm	Steel	2338 lbf	3282 lbf	22.9	6.5 g
K17X21X17	Needle	17 mm	21 mm	17 mm	Steel	2743 lbf	4024 lbf	22.9	9.5 g
K185X195X37	Needle	185 mm	195 mm	37 mm	Steel	28776 lbf	95544 lbf	2.6	607 g
K18X22X10	Needle	18 mm	22 mm	10 mm	Steel	1888 lbf	254 lbf	22.4	6 g
K18X22X13	Needle	18 mm	22 mm	13 mm	Steel	2068 lbf	2855 lbf	22.4	8 g
K18X22X17	Needle	18 mm	22 mm	17 mm	Steel	272 lbf	4047 lbf	22.4	11 g
K18X24X12	Needle	18 mm	24 mm	12 mm	Steel	2878 lbf	335 lbf	21.8	12 g
K18X24X13	Needle	18 mm	24 mm	13 mm	Steel	2945 lbf	344 lbf	21.8	13 g
K18X24X20	Needle	18 mm	24 mm	20 mm	Steel	4541 lbf	607 lbf	21.8	18 g
K18X25X22	Needle	18 mm	25 mm	22 mm	Steel	5193 lbf	6519 lbf	21.6	23 g
K195X205X37	Needle	195 mm	205 mm	37 mm	Steel	299 lbf	101164 lbf	2.5	620 g
K19x23x13	Needle	19 mm	23 mm	13 mm	Steel	2136 lbf	3035 lbf	21.8	8 g
K19x23x17	Needle	19 mm	23 mm	17 mm	Steel	281 lbf	4316 lbf	21.8	11 g
K20X24X10	Needle	20 mm	24 mm	10 mm	Steel	2001 lbf	2833 lbf	21.3	6.5 g
K20X24X13	Needle	20 mm	24 mm	13 mm	Steel	2203 lbf	3215 lbf	21.3	9 g
K20X24X17	Needle	20 mm	24 mm	17 mm	Steel	29 lbf	4586 lbf	21.3	12 g
K20X26X12	Needle	20 mm	26 mm	12 mm	Steel	3012 lbf	3642 lbf	20.9	11 g
K20X26X13	Needle	20 mm	26 mm	13 mm	Steel	3237 lbf	4024 lbf	20.9	12 g
K20X26X17	Needle	20 mm	26 mm	17 mm	Steel	4316 lbf	5845 lbf	20.9	16 g
K20X26X20	Needle	20 mm	26 mm	20 mm	Steel	4743 lbf	6519 lbf	20.9	19 g
K20X28X16	Needle	20 mm	28 mm	16 mm	Steel	4451 lbf	5036 lbf	20.4	20 g
K20X28X20	Needle	20 mm	28 mm	20 mm	Steel	5373 lbf	6407 lbf	20.4	27 g
K20X28X25	Needle	20 mm	28 mm	25 mm	Steel	6857 lbf	8768 lbf	20.4	32 g
K20X30X30	Needle	20 mm	30 mm	30 mm	Steel	7981 lbf	933 lbf	19.6	49 g
K210X220X42	Needle	210 mm	220 mm	42 mm	Steel	34621 lbf	125893 lbf	2.3	740 g
K21X25X13	Needle	21 mm	25 mm	13 mm	Steel	2271 lbf	3395 lbf	20.9	9 g
K220X230X42	Needle	220 mm	230 mm	42 mm	Steel	3552 lbf	132637 lbf	2.2	790 g
K22X26X10	Needle	22 mm	26 mm	10 mm	Steel	2046 lbf	3012 lbf	20.4	7.5 g
K22X26X13	Needle	22 mm	26 mm	13 mm	Steel	2338 lbf	3574 lbf	20.4	9.5 g
K22X26X17	Needle	22 mm	26 mm	17 mm	Steel	308 lbf	5103 lbf	20.4	12 g
K22X28X17	Needle	22 mm	28 mm	17 mm	Steel	4361 lbf	607 lbf	19.6	18 g
K22X29X16	Needle	22 mm	29 mm	16 mm	Steel	4496 lbf	5733 lbf	19.2	16 g
K22X30X15-TV	Needle	22 mm	30 mm	15 mm	Steel	4519 lbf	5261 lbf	18.8	18 g

About needle roller combination bearings

The so-called needle roller combination bearing refers to a bearing that is a combination of a needle roller bearing and other types of bearings. According to the difference of the combined bearings, the needle roller combination bearing is divided into NKX type, NKXR type, NKIA type, NKIB type, AXN type and ARN type, the detailed information of various types of needle roller combination bearings are as follows:

NKX (needle roller combined thrust ball bearing).

Needle roller bearings bear radial loads, and thrust ball bearings bear axial loads. They are suitable for bearing lighter axial loads and can rotate at high speeds. Common codes are such as NKX20T2Z, where T2 stands for resin cage and Z stands for dust cover. , if there is no suffix, it is an iron cage.

NKXR (needle roller combined thrust roller bearing)

The shape of the NKXR type is basically the same as the NKX type. The balls are replaced by rollers, which can withstand higher axial loads. The rear code is the same as the NKX type.

Part Number	Bore Dia	Outer Dia	Thickness	Needle Material	Dynamic Thrust Load	Static Thrust Load	Max Speed (X1000 rpm)
AXK0414-TV	4 mm	14 mm	2 mm	Steel	989 lbf	1798 lbf	21.5
AXK0515-TV	5 mm	15 mm	2 mm	Steel	1068 lbf	2068 lbf	20.6
AXK0619-TV	6 mm	19 mm	2 mm	Steel	1529 lbf	3485 lbf	18.9
AXK0821-TV	8 mm	21 mm	2 mm	Steel	1754 lbf	4361 lbf	17.8
AXK100135	100 mm	135 mm	4 mm	Steel	20458 lbf	125893 lbf	2.4
AXK1024	10 mm	24 mm	2 mm	Steel	2068 lbf	5733 lbf	16.9
AXK110145	110 mm	145 mm	4 mm	Steel	21806 lbf	139382 lbf	2.2
AXK120155	120 mm	155 mm	4 mm	Steel	22931 lbf	15287 lbf	2.1
AXK1226	12 mm	26 mm	2 mm	Steel	2226 lbf	6519 lbf	15.2
AXK130170	130 mm	170 mm	5 mm	Steel	299 lbf	18884 lbf	1.9
AXK140180	140 mm	180 mm	5 mm	Steel	31024 lbf	202328 lbf	1.8
AXK150190	150 mm	190 mm	5 mm	Steel	32148 lbf	215817 lbf	1.7
AXK1528	15 mm	28 mm	2 mm	Steel	254 lbf	8093 lbf	13.2
AXK160200	160 mm	200 mm	5 mm	Steel	33272 lbf	229305 lbf	1.6
AXK1730	17 mm	30 mm	2 mm	Steel	2675 lbf	888 lbf	12.1
AXK2035	20 mm	35 mm	2 mm	Steel	2945 lbf	10454 lbf	10.5
AXK2542	25 mm	42 mm	2 mm	Steel	3305 lbf	13039 lbf	8.4
AXK3047	30 mm	47 mm	2 mm	Steel	3664 lbf	15737 lbf	7.3
AXK3552	35 mm	52 mm	2 mm	Steel	4002 lbf	1821 lbf	6.5
AXK4060	40 mm	60 mm	3 mm	Steel	6295 lbf	25628 lbf	5.6
AXK4565	45 mm	65 mm	3 mm	Steel	6744 lbf	28776 lbf	5.1
AXK5070	50 mm	70 mm	3 mm	Steel	7194 lbf	32148 lbf	4.7
AXK5578	55 mm	78 mm	3 mm	Steel	8543 lbf	41814 lbf	4.3
AXK6085	60 mm	85 mm	3 mm	Steel	10004 lbf	52605 lbf	3.9
AXK6590	65 mm	90 mm	3 mm	Steel	10454 lbf	57326 lbf	3.7
AXK7095	70 mm	95 mm	4 mm	Steel	1214 lbf	57326 lbf	3.5
AXK75100	75 mm	100 mm	4 mm	Steel	12364 lbf	59574 lbf	3.3
AXK80105	80 mm	105 mm	4 mm	Steel	12589 lbf	62947 lbf	3.1
AXK85110	85 mm	110 mm	4 mm	Steel	13039 lbf	65195 lbf	3
AXK90120	90 mm	120 mm	4 mm	Steel	16411 lbf	91048 lbf	2.7
AXW10	10 mm	27 mm	3.2 mm	Steel	2068 lbf	5733 lbf	16.9
AXW12	12 mm	29 mm	3.2 mm	Steel	2226 lbf	6519 lbf	15.2
AXW15	15 mm	31 mm	3.2 mm	Steel	254 lbf	8093 lbf	13.2
AXW17	17 mm	33 mm	3.2 mm	Steel	2675 lbf	888 lbf	12.1
AXW20	20 mm	38 mm	3.2 mm	Steel	2945 lbf	10454 lbf	10.5
AXW25	25 mm	45 mm	3.2 mm	Steel	3305 lbf	13039 lbf	8.4
AXW30	30 mm	50 mm	3.2 mm	Steel	3664 lbf	15737 lbf	7.3
AXW35	35 mm	55 mm	3.2 mm	Steel	4002 lbf	1821 lbf	6.5
AXW40	40 mm	63 mm	4.2 mm	Steel	6295 lbf	25628 lbf	5.6
AXW45	45 mm	68 mm	4.2 mm	Steel	6744 lbf	28776 lbf	5.1
AXW50	50 mm	73 mm	4.2 mm	Steel	7194 lbf	32148 lbf	4.7
TC1018	0.625″	1.125″	0.078″	Steel	2158 lbf	6632 lbf	13
TC1220	0.75″	1.25″	0.078″	Steel	2405 lbf	7981 lbf	11.3
TC1423	0.875″	1.438″	0.078″	Steel	2878 lbf	10454 lbf	9.8
TC1427	0.875″	1.688″	0.078″	Steel	4406 lbf	18659 lbf	8.9
TC1625	1″	1.563″	0.078″	Steel	3125 lbf	1214 lbf	8.9
TC1726	1.0625″	1.625″	0.078″	Steel	3395 lbf	13713 lbf	8.4
TC1828	1.125″	1.75″	0.078″	Steel	3844 lbf	16411 lbf	7.9
TC2031	1.25″	1.938″	0.078″	Steel	4474 lbf	20458 lbf	7.1
TC2233	1.375″	2.063″	0.078″	Steel	4564 lbf	21582 lbf	6.6
TC2435	1.5″	2.188″	0.078″	Steel	4833 lbf	2383 lbf	6.1
TC2840	1.75″	2.5″	0.078″	Steel	5598 lbf	30124 lbf	5.2
TC3244	2″	2.75″	0.078″	Steel	562 lbf	32597 lbf	4.1
TC3648	2.25″	3″	0.078″	Steel	607 lbf	3507 lbf	4.4
TC4052	2.5″	3.25″	0.078″	Steel	6182 lbf	37768 lbf	4
TC411	0.25″	0.688″	0.078″	Steel	1371 lbf	299 lbf	19.2
TC4860	3″	3.75″	0.078″	Steel	6632 lbf	42714 lbf	3.4
TC512	0.3125″	0.75″	0.078″	Steel	1551 lbf	3642 lbf	18
TC5266	3.25″	4.125″	0.126″	Steel	10903 lbf	60698 lbf	2.6
TC613	0.375″	0.813″	0.078″	Steel	1596 lbf	3979 lbf	17.4
TC815	0.5″	0.938″	0.078″	Steel	1911 lbf	5305 lbf	15.8

NKIA (needle roller combination angular contact ball bearing).

The combined bearing composed of needle roller bearings and angular contact ball bearings can withstand the unidirectional axial load determined by the angular contact ball bearing, and is suitable for high-speed rotation and light load scenarios.

NKIB (needle roller combination three-point contact ball bearing)

The combined bearing composed of needle roller bearing and three-point contact ball bearing has the same application range as NKIA type and can withstand bidirectional axial load.

AXN (needle roller combination bidirectional thrust needle roller bearing).

A combination bearing of a needle roller bearing and a bidirectional thrust needle roller is a support bearing for precision ball screws and can withstand bidirectional axial loads.

ARN (needle roller combination two-way thrust roller bearing).

It is basically the same as the AXN type, but in comparison, the ARN type has a higher axial load capacity.

Advantages and Disadvantages of Needle Roller Bearings

Needle roller bearings, favored by the machinery manufacturing industry, are a type of bearing with slender rollers and a small cross-sectional area. At present, needle roller bearings are mainly suitable for support structure products with small radial installation dimensions. Next, let’s briefly introduce the main advantages and disadvantages of needle roller bearings with outstanding quality and special purposes.

Compact radial structure

At present, as mechanical products have developed to a very refined level, many mechanical products have detailed requirements for the bearing products used due to actual needs. Needle roller bearings that meet customers are a special kind of needle roller bearings developed on this basis. Bearing products, needle roller bearings have the characteristics of very compact radial structure, and can exert better functional advantages in mechanical products with smaller radial space.

Larger load intensity

Because bearing products require long-term operation in actual use, there are strict requirements for their load strength. At present, many mechanical products are beginning to develop in the direction of miniaturization and precision, and there are very strict requirements for the structure and size of bearing products. Needle roller bearings are cost-effective and quality-guaranteed products because they are made of high-quality materials and their structure is extremely suitable for small spaces. In the same radial size, the load capacity of needle roller bearings is its advantage over other products.

Long service life

Needle roller bearing products are designed with the needs of many mechanical products in mind. At the same time, in order to enhance their strength and load capacity, manufacturers use extremely hard alloy materials when producing needle roller bearings. This makes needle roller bearings an ideal choice for machinery. The product can achieve a long service life and has a very high cost-effective advantage.

Conclusion

The advantages of needle roller bearings: small friction resistance, low power consumption, high mechanical efficiency, and easy starting. The dimensions are standardized, interchangeable, easy to install and disassemble, and easy to maintain. Compact structure, light weight and smaller axial size. High precision, high rotation speed, small wear and long service life. Some bearings have self-aligning performance and are suitable for mass production. They have stable and reliable quality and high production efficiency. The transmission friction torque is much lower than that of hydrodynamic bearings, so the friction temperature rise and power consumption are lower; the starting friction torque is only slightly higher than the rotational friction torque; the sensitivity of bearing deformation to load changes is smaller than that of hydrodynamic bearings; only a small amount is needed The lubricant can operate normally and can provide lubricant for a long time during operation; the axial size is smaller than that of traditional hydrodynamic bearings; it can withstand radial and thrust combined loads at the same time; in a large load-speed range, the unique design Excellent performance can be obtained; bearing performance is relatively insensitive to fluctuations in load, speed and operating speed.

Disadvantages of needle roller bearings: they are noisy, the structure of the bearing seat is relatively complex, and the cost is high. Even if the bearings are well lubricated, installed correctly, dust-proof and moisture-proof, and operate normally, they will eventually fail due to fatigue of the rolling contact surface.

Needle roller bearing products are currently widely used in miniaturized mechanical products, which can effectively improve the quality and performance of mechanical products. Taken together, the needle roller bearing product with a single range of use not only has a compact radial structure, but its load intensity per unit area is also far higher than that of other bearing products, and this needle roller bearing product with excellent quality and stable performance also has The advantages of extremely long service life are the main advantages of this unique needle roller bearing for special applications in this radial structure.

Needle roller bearings VS ball bearings

Ball bearings are a commonly used precision bearing with characteristics of light load and high speed. Its appearance is spherical and consists of an inner ring, an outer ring, a ball and a cage. The following is an analysis of the advantages and disadvantages of ball bearings:

Advantages of ball bearings:

1. High speed: The structure of the ball bearing gear makes its friction coefficient relatively small, so it can withstand high-speed rotation.
2. Low noise: There is no contact surface between the wheels of ball bearings. The combination of these factors makes ball bearings have low friction, low noise and long life.
3. High precision: Because the inner ring, outer ring and spherical body of the ball bearing are processed with high precision, its precision is very high.
4. Suitable for bearing radial and axial loads.

Disadvantages of Ball bearing

1. Low load carrying capacity: The radius of the ball bearing is very small, so the load it can carry is also small.
2. Accuracy is affected by contamination: Ball bearings have high accuracy, and impurities such as particles or dust will affect their accuracy and affect the free rotation of the wheel.
3. Vibration and impact loads can cause wheels to shatter.

Ball bearings and needle roller bearings each have their own advantages and disadvantages. When choosing a bearing type, you need to choose based on your requirements for load, speed, accuracy and other factors. If you need to bear a smaller load and require high-speed operation, it is better to choose a ball bearing. If you need to bear a larger load and have strong vibration resistance, it is appropriate to choose a needle roller bearing. By clearly understanding and evaluating their characteristics, the correct bearings can be selected effectively, thus ensuring the stability and performance of the equipment.

Needle roller bearings VS tapered roller bearings

Needle roller bearings (NK, NKS, RNA49, RNA48, NKL, NKLS, NA49, NA48, RNA69, NA69, RNA49…RS, RNA49..2RS, NA49..RS, NA49..2RS, RNAO, NAO) Compact structure, The radial size is small, the load capacity is large, and it can withstand large radial loads. This type of bearing has a variety of structures and size series. The assembled G2 grade needle rollers have a batch diameter variation within 2um. Except for the full complement needle roller bearings, they all use high-performance cages to correctly guide the parallel axis of the needle rollers. .

The fundamental difference: the rolling elements of tapered roller bearings are tapered rollers; the rolling elements of needle roller bearings are needle rollers; the structures are different, the types are different, the bearing capacity is different, the speed ratio is different, and the load is different. The materials are different and the places of use are different. Essential difference: the rolling elements of tapered roller bearings are tapered rollers; the rolling elements of needle roller bearings are fibrous rollers;

The above essential differences determine that the structure of tapered roller bearings is larger than that of needle roller bearings. In addition to radial loads, tapered rollers can also bear axial loads, while needle roller bearings can only bear radial loads; tapered roller bearings can only bear radial loads. Roller bearings are divided into single row, double row and multi-row, each of which is used in different environments and places;

Tapered roller bearings have a higher operating speed than needle roller bearings; tapered roller bearings are generally made of high-quality bearing steel and special steel; while thick-walled needle roller bearings are stamped from thick steel plates In other words, these two types of bearings are not the same type of bearings. There are so many differences that they pale in comparison. Needle roller bearings are composed of thin and long needle rollers and cages.

Needle roller bearings VS cylindrical roller bearings

Cylindrical roller bearings have linear contact with the raceway. Therefore, the load capacity is large. According to the ribs of their rings, they can be divided into single-row cylindrical roller bearings such as NU type, NJ type, NUP type, N type, and NF type, and double-row cylindrical roller bearings such as NNU type and NN type. Cylindrical roller bearings with ribless rings, whose inner and outer rings can move relative to each other in the axial direction, are often used at the free end of equipment. There is a double rib on one side of the inner ring or outer ring and a single rib on the other side, which can withstand a certain unidirectional axial load. The cage is mostly made of steel plate stamping or copper alloy turning. A small number of them use polyamide molded cages.

The main differences between cylindrical roller bearings and needle roller bearings:

1. The rolling elements are different. The rolling elements of needle roller bearings are thinner and longer;
2. The spatial structure of needle roller bearings is relatively small;
3. Needle roller bearings can only bear radial force; but cylindrical rollers can also bear a certain axial force;
4. Cylindrical roller bearings are available in single row, double row and multi-row, and can be used in environments;
5. Needle roller bearings can only be used at low-speed working speeds;
6. Thin-walled needle roller bearings are made of stamped steel plates.

Choose the right needle roller bearing

Needle roller bearing is a high-precision, high-load bearing, consisting of an inner ring, an outer ring, and needle rollers. Because of its advantages such as high precision, high load, and low friction, it is widely used in machine tools, heavy machinery, automobiles, motorcycles and other industries.

Needle roller bearing size chart

The following is a table of commonly used needle roller bearing models and their detailed parameter specifications for user reference.

NA4900 series

Inner diameter range: 10mm – 150mm
Outer diameter range: 22mm – 190mm
Width range: 13mm – 40mm
Basic load dynamic rating: 8600N – 135000N
Basic load static rating: 10000N – 166000N
Scope of application: Mostly used in motorcycles, bicycles and other fields.

NKI series

Inner diameter range: 5mm – 150mm
Outer diameter range: 15mm – 215mm
Width range: 12mm – 70mm
Basic load dynamic rating: 14700N – 390000N
Basic load static rating: 22500N – 670000N
Scope of application: Mostly used in home appliances, power tools, automobiles, motorcycles and other fields.

RNA series

Inner diameter range: 14mm – 360mm
Outer diameter range: 22mm – 440mm
Width range: 12mm – 80mm
Basic load dynamic rating: 16800N – 800000N
Basic load static rating: 22400N – 1330000N
Scope of application: Mostly used in heavy machinery, metallurgy, mining, rail transit and other fields.

HK series

Inner diameter range: 3mm – 60mm
Outer diameter range: 6.5mm – 68mm
Width range: 6mm – 25mm
Basic load dynamic rating: 2600N – 25600N
Basic load static rating: 2750N – 31500N

Application: Mostly used in home appliances, power tools, automobiles and other fields.
These are commonly used needle roller bearing models and their detailed parameter specifications. Since there are many types and specifications of needle roller bearings, appropriate products need to be selected according to the needs of different fields.

Factors to consider when choosing needle roller bearings

1. Select appropriate needle roller bearings according to the needs of different industries. For example, the machine tool field requires high-speed, high-precision, and low-noise products; the automotive field requires products with strong load-bearing capacity and good durability.
2. When selecting, you need to comprehensively consider the inner diameter, outer diameter, width and other parameters according to the needle roller bearing parameter table.
3. When installing, please refer to the product installation instructions and choose the correct installation method and tools to prevent damage during the installation process.
4. Needle roller bearings must be kept clean and dry during use to prevent corrosion, wear and other problems.
5. Regularly inspect, maintain and repair needle roller bearings to ensure their normal operation.