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K25X31X21 Radial needle roller and cage assemblies

K25X31X21 Radial Needle Roller And Cage Assemblies

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Min. Order:
1 Piece
Payment term:
TT ,PAYPAL ,Western Union
Delivery time:
according your quantity
Technical Parameters:
Product Designations:
K25X31X21
Structure:
Radial needle roller and cage assemblies
Inside Diameter:
25 mm
Outside Diameter:
31 mm
Thickness:
21 mm
Weight:
0.0262 KG
Brand:
Neutral or OEM
Precision Rating:
P0 P6 P5 P4 P2
Bearing Material:
bearing steel Gcr15
K25X31X21 Radial Needle Roller And Cage Assemblies

Item No:K25X31X21 Radial needle roller and cage assemblies

As for Model K, K...D radial needle and retainer assembly, this kind of bearing only has a group of radial needle and retainer assembly. With small outside diameter size, it is suitable for the parts, where the radial sizes are specially limited, used for bearing the radial load. Model K...ZW, K...ZWD radial needle and retainer assembly is the double row radial needle and retainer assembly.


As for this kind of bearing, since it has not collar, the surface of journal and the surface of hole at the housing are directly acted as rolling surface with surface hardness HRC 60 and surface roughness Ra no more than 0.63µm.


In order to satisfy the requirement of main machine, this kind of bearing can be made in split bearing, convenient for mounting. Model K...D represents as the single row split bearing and Model K...ZWD represents as double row split bearing.

 

(1-1) K single-row radial needle roller and cage assembly

(1-2) K...ZW double-row radial needle roller and cage assembly

(1-3) K... D partial single-row radial needle roller and cage assembly

(1-4) K...ZWD double-row radial needle roller and cage assembly

 

Shaft 
Diameter		 Bearing Designation Mass 
Approx		 Boundary Dimensions Basic Load Rating Limiting Speed
Current Code Original Code Fw D C Dynamic Static Oil
mm g mm N rpm
3 K3X5X7TN   0.3 3 5 7 1.54 1.29 50000
K3X5X9TN   0.4 3 5 9 1.71 1.48  
K3X6X7TN   0.4 3 6 7 1.43 0.97 47000
4 K4X7X7TN   0.5 4 7 7 2.33 1.84 43000
K4X7X10TN   0.7 4 7 10 2.35 1.92 39000
5 K5X8X8TN 29241/5 0.7 5 8 8 2300 1880 37000
K5X8X10TN 39241/5 0.9 5 8 10 2800 2450 37000
6 K6X9X8TN 29241/6 0.8 6 9 8 25600 2240 35000
K6X9X10TN 39241/6 1 6 9 10 3300 3100 35000
K6X10X13TN 19241/6 1.3 6 10 13 3500 2800 33000
7 K7X10X8TN 29241/7 0.9 7 10 8 2750 2550 32000
K7X10X10TN 39241/7 1.1 7 10 10 3350 3400 32000
8 K8X11X8TN 29241/8 1.1 8 11 8 3000 2900 30000
K8X11X10TN 39241/8 1.7 8 11 10 3830 3950 30000
K8X11X13TN 49241/8 1.8 8 11 13 5000 5700 30000
K8X12X10TN 29242/8 1.3 8 12 10 4900 4600 30000
9 K9X12X10TN 39241/9 1.5 9 12 10 4200 4700 30000
K9X12X13TN 19241/9 1.9 9 12 13 5500 6700 30000
10 K10X13X10TN 39241/10 1.6 10 13 10 4500 5250 27000
K10X13X13TN 39241/10 2.1 10 13 13 6000 7600 27000
K10X13X16TN   2.2 10 13 16 6300 7800 27000
K10X14X10TN 29242/10 2.9 10 14 10 7000 7900 27000
K10X14X13TN 3922/10 4.3 10 14 13 8000 9100 26000
K10X16X12TN 19244/10 3.7 10 16 12 7000 9300 27000
12 K12X15X9TN   2.7 12 15 9 4120 5210 25000
K12X15X10TN 39241/12 1.9 12 15 10 4320 5730 25000
K12X15X13TN 49241/12 2.4 12 15 13 6000 8100 25000
K12X16X8TN 19242/12 2.9 12 16 8 1200 4700 25000
K12X16X10TN 29242/12 3.4 12 16 10 6000 6900 25000
K12X16X13TN 39242/12 3.8 12 16 13 7900 9200 25000
K12X17X13TN 59242/12 4.4 12 17 13 9300 10000 24000
K12X18X12TN 19244/12 5 12 18 12 9800 8000 24000
K12X15X20TN   3.8 12 15 20 8200 12000 25000
14 K14X17X10   4 14 17 10 5100 6800 23000
K14X17X17   6.8 14 17 17 9300 14000 23000
K14X18X10 29242/14 4.8 14 18 10 6800 8300 23000
K14X18X13 39242/14 6.3 14 18 13 8100 9800 23000
K14X18X14   6.8 14 18 14 9200 12000 23000
K14X18X15 49242/14 7.3 14 18 15 10000 13000 23000
K14X18X17 59242/14 8.1 14 18 17 10500 13900 23000
K14X20X12 19243/14 8.6 14 20 12 9900 10500 22000
15 K15X18X14   5.3 15 18 14 7500 11000 23000
K15X18X17   6.4 15 18 17 9600 15900 23000
K15X19X10 29242/15 5.1 15 19 10 7200 9000 22000
K15X19X13 39241/15 7 15 19 13 8300 9800 22000
K15X19X17 59241/15 8.8 15 19 17 10300 15000 22000
K15X19X24 ZW 79241/15 10.5 15 19 24 12800 20100 22000
K15X22X13 29242/15 8.9 15 22 13 9700 11000 22000
K15X22X12 19243/15 10 15 22 12 10000 13000 22000
K15X21X15 39242/15 13 15 21 15 13800 16000 22000
K15X21X21   18.2 15 21 21 18000 24000 22000
16 K16X20X10 29241/16 5.7 16 20 10 7600 9700 22000
K16X20X13 39241/16 7.1 16 20 13 8700 11300 22000
K16X20X17 59241/16 9.2 16 20 17 11200 16300 22000
K16X21X10 19242/16 3.7 16 21 10 9000 12000 22000
K16X22X12 19243/16 10.4 16 22 12 11000 12000 21000
K16X22X13   11.9 16 22 13 12000 13400 21000
K16X22X16   13.7 16 22 16 14300 17000 21000
K16X22X20 49243/16 16.7 16 22 20 18000 22300 21000
K16X23X14 19244/16 20 16 23 14 19000 21000 19000
K16X24X20 19245/16 24.9 16 24 20 21100 23000 20000
17 K17X21X10 29241/17 5.6 17 21 10 7900 10100 21000
K17X21X13 39241/17 7.5 17 21 13 10000 14100 21000
K17X21X17 59241/17 9.5 17 21 17 12000 17400 21000
K17X23X14 29243/17 11.5 17 23 14 11000 15000 21000
18 K18X22X10 29241/18 6.1 18 22 10 8200 9900 20000
K18X22X13 39241/18 7.7 18 22 13 9000 12100 20000
K18X22X17 59241/18 10.8 18 22 17 11900 17600 20000
K18X24X12 19243/18 11.6 18 24 12 11200 12900 20000
K18X24X13   12.6 18 24 13 12900 14900 20000
K18X24X13.5   13 18 24 13.5 12900 14900 20000
K18X24X20 49243/18 19 18 24 20 20000 26500 20000
K18X25X14   14.9 18 25 14 16500 18800 20000
K18X25X22   24.3 18 25 22 22900 28400 20000
K18X26X14   19 18 26 14 18000 20000 18000
K18X28X16 19244/18 24 18 28 16 19000 18400 19000
19 K19X23X13   8.2 19 23 13 9300 13000 20000
K19X23X17   11.1 19 23 17 12000 18600 20000
20 K20X24X10 29241/20 6.5 20 24 10 8700 12100 19000
K20X24X12   8 20 24 12 9600 13800 19000
K20X24X13 39241/20 8.9 20 24 13 9600 13800 19000
K20X24X17 59241/20 11.2 20 24 17 12400 20000 19000
K20X26X12 19243/20 13.2 20 26 12 13100 15700 19000
K20X26X16 K9249/20 17.5 20 26 16 18000 25000 18500
K20X26X17 39243/20 18.2 20 26 17 18700 25500 19000
K20X26X20 49243/20 22 20 26 20 20600 28500 19000
K20X28X20 19245/20 26.8 20 28 20 23400 28000 18000
K20X28X25 29245/20 36.2 20 28 25 30000 28500 18000
K20X30X30 39245/20 56 20 30 30 35000 41000 18000
21 K21X25X13   9 21 25 13 9600 14500 19000
K21X25X17   12 21 25 17 12800 21000 19000
22 K22X26X10 29241/22 7.1 22 26 10 8700 12900 18000
K22X26X13 39241/22 9.4 22 26 13 10000 15400 18000
K22X26X17 59241/22 12.1 22 26 17 13100 22100 18000
K22X27X13 29242/22 10.8 22 27 13 14000 23000 18000
K22X28X17 39243/22 19.7 22 28 17 19000 26500 18000
K22X28X23 59243/22 26 22 28 23 20000 27000 19000
K22X29X16 19244/22 22.2 22 29 16 19500 25000 17000
K22X30X15TN   14.4 22 30 15 19600 22900 17000
K22X30X20 19245/22 28 22 30 20 21000 23500 18900
K22X32X24   43.4 22 32 24 33500 39500 16000
23 K23X35X16TN   30 23 35 16 24000 23400 15000
24 K24X28X10   8.1 24 28 10 9400 14300 17000
K24X28X13   10.1 24 28 13 10500 17000 17000
K24X28X17 9243/24 13.2 24 28 17 14000 24500 17000
K24X29X13   13.5 24 29 13 13100 19100 16000
K24X30X17   21.5 24 30 17 19000 27000 16000
K24X30X31   39.1 24 30 31 27000 43000 16000
25 K25X29X10 29241/25 8.3 25 29 10 9700 14900 16000
K25X29X13 39241/25 10.4 25 29 13 10800 17900 16000
K25X29X17 59241/25 13.7 25 29 17 14500 25500 16000
K25X30X13 29242/25 12.9 25 30 13 14100 21300 16000
K25X30X20 59242/25 20.5 25 30 20 21100 28000 16000
K25X30X25   21 25 30 25 21700 40400 15000
K25X30X26 52.436 21.6 25 30 26 20100 26500 15000
K25X31X17 39243/25 21.8 25 31 17 19000 28000 16000
K25X31X21

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