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K Series Radial Needle Roller and Cage Assemblies

BWK radial needle roller and cage assemblies combine high radial load capacity with a very small cross section for compact and efficient bearing designs.
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  • K3X5X9, K4X7X7TN1, K5X8X9TN5, K5X8X10, K6X9X8, K6X9X10, K7X10X10, K8X11X10, K8X12X12, K9X12X10, K10X13X10, K10X14X13, K12X15X13, K14X18X17

  • BWK

Product Details

Radial Needle Roller and Cage Assemblies

Radial needle roller and cage assemblies consist of needle rollers retained and guided by a cage. The shaft and housing can serve directly as raceways when properly machined.


Structure and Features

  • Very small radial cross section

  • High radial load capacity

  • Low mass and low inertia

  • Suitable for high-speed compact arrangements


Applications

Transmissions, small engines, power tools, industrial gearboxes and compact mechanical assemblies.


Representative Models

K3X5X9, K5X8X10, K6X9X10, K8X11X10, K10X13X10, K12X15X13 and K14X18X17

Radial_Needle_Roller_and_Cage_Section

Technical Data

Shaft Dia. (mm) Current Designation Original Designation Fw (mm) Ew (mm) Bc (mm) Dynamic Cr (N) Static Cor (N) Grease Speed (rpm) Oil Speed (rpm) Weight (kg)
3 K3X5X9 SZ-406 3 5 9 1200 1000 30000 45000 0.0003
4 K4X7X7TN1 — 4 7 7 1800 1300 25800 43000 0.000519
5 K5X8X9TN5 — 5 8 9 2900 2500 23400 39000 0.00084
5 K5X8X10/P6S0 E39241/5T 5 8 10 2400 2200 23000 36000 0.0014
6 K6X9X8/P6S0 E29241/6T 6 9 8 2400 2200 20000 32000 0.0013
6 K6X9X8TN1 — 6 9 8 2600 2200 20200 37000 0.0008
6 K6X9X10TN1 — 6 9 10 2600 2900 20200 37000 0.0011
6 K6X9X13.5TN1 — 6 9 13.5 4300 4300 21000 35000 0.00146
6 K6X9X17ZWTN1 — 6 9 17 4900 5100 21000 35000 0.00169
6 K6X10X11 SZ-416 6 10 11 3300 2900 20000 32000 0.0028
7 K7X10X10TN1 — 7 10 10 3200 3000 19000 31000 0.0010
8 K8X11X10 9242/8 8 11 10 3900 4000 18000 30000 0.00185
8 K8X11X10/P6S0 E39241/8T 8 11 10 3900 4000 18000 30000 0.0020
8 K8X11X13TN1 — 8 11 13 4400 4600 19200 32000 0.00170
8 K8X11X17ZW — 8 11 17 4800 5200 21000 35000 0.00325
8 K8X12X8 19242/8 8 12 8 3500 2900 18000 30000 0.0022
8 K8X12X12 — 8 12 12 5500 5200 18000 30000 0.0034
9 K9X12X10 39241/9 9 12 10 3700 3900 17000 28000 0.0015
9 K9X12X13 K091213 9 12 13 5100 5700 16000 27000 0.0028
10 K10X13X10 9242/10 (39241/10) 10 13 10 4400 5000 15000 26000 0.0024
10 K10X13X13 9243/10 (49241/10) 10 13 13 5400 6400 15000 26000 0.0030
10 K10X14X10 29242/10 10 14 10 4800 4600 15000 26000 0.0034
10 K10X14X13 39242/10 10 14 13 6500 6800 15000 26000 0.0044
10 K10X14X20ZW — 10 14 20 7600 8300 18000 30000 0.006148
10 K10X16X12TN1 — 10 16 12 7700 6700 16800 28000 0.00464
12 K12X15X8TN1 — 12 15 8 4000 4600 16200 27000 0.001603
12 K12X15X10 9242/12 (39241/12) 12 15 10 4300 5100 14000 24000 0.0030
12 K12X15X13 9243/12 (49241/12) 12 15 13 6000 7800 14000 24000 0.0036
12 K12X16X13 39242/12 12 16 13 6400 7000 14000 24000 0.0045
14 K14X18X10 29241/14 (9241/14) 14 18 10 6800 7800 14000 24000 0.0046
14 K14X18X13 9242/14 (39241/14) 14 18 13 8200 10000 14000 24000 0.0063
14 K14X18X17 9243/14 (59241/14) 14 18 17 10200 13300 14000 24000 0.0072
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radial needle roller and cage assemblies K series needle bearing K3X5X9 K5X8X10 K8X11X10 K10X13X10 BWK Bearing