Needle Roller Bearings

Needle Roller Bearings

Core Features

  • High Radial Load-to-Size Ratio: Features cylindrical rollers with a high length-to-diameter ratio (needle rollers), allowing for maximum load-carrying capacity in an extremely small radial cross-section.
  • Space-Saving Design: Ideal for applications where radial space is limited, as the small diameter of the rollers significantly reduces the overall height of the bearing.
  • Exceptional Rigidity: Despite their small size, the high number of contact points between the rollers and raceways provides excellent structural stiffness under radial stress.
  • Low Section Height: Allows for more compact machinery designs, often enabling the rollers to run directly on hardened shafts or housings to save even more space.
  • Low Inertia: The small mass of the needle rollers reduces the internal inertia of the bearing, making them suitable for oscillating movements and high-acceleration applications.

At Kriloha Ltd., we understand that “Compact-Precision” is the hallmark of modern engineering efficiency. Our Needle Roller Bearings are our engineered answer for “High-Radial-Support” and “Space-Optimization”. As a premier provider of industrial components, Kriloha has developed a needle-bearing series that balances mechanical invincibility with the design agility required for miniature and high-power-density equipment.

The engineering of our needle roller series is based on Enhanced Contact Dynamics. By utilizing rollers that are precision-ground to micron tolerances, we ensure that the load is distributed uniformly across the entire length of the needle, preventing the “stress-peaking” that leads to premature shaft wear. At Kriloha, we verify that our cages—whether made of high-strength steel or glass-fiber reinforced polymer—provide superior guidance and lubricant retention. This creates a “Power-Dense” support system that remains stable even in the most restricted mounting environments.

Manufacturing these bearings involves strict Micro-Dimensional Verification. We ensure that each roller is matched to its set with extreme accuracy to provide silent and vibration-free operation. Whether you are optimizing a high-cycle industrial actuator or maintaining a sophisticated automotive drivetrain, Kriloha Needle Roller Bearings provide the mechanical durability your facility demands. By choosing Kriloha Ltd., you are investing in a “Miniaturized-Strength” technology that secures your most space-critical rotating assets.

Bearing Table

SR. NO. BEARING NO. BOUNDARY DIMENSIONS (in mm) MASS
(~ Kg.)
d D B
1 15 x 21 x 15 15.000 21.000 15.000 0.013
2 15 x 21 x 17 15.000 21.000 17.000 0.014
3 B 16 x 22 x 12 16.000 22.000 12.000 0.005
4 16 x 22 x 16 16.000 22.000 16.000 0.014
5 18 x 24 x 12 18.000 24.000 12.000 0.010
6 20 x 26 x 16 20.000 26.000 16.000 0.014
7 22 x 26 x 28.5 22.000 26.000 28.500 0.020
8 22 x 30 x 15 22.000 30.000 15.000 0.023
9 25 x 30 x 17 25.000 30.000 17.000 0.015
10 25 x 30 x 20 25.000 30.000 20.000 0.021
11 25 x 31 x 17 25.000 31.000 17.000 0.020
12 25 x 32 x 16 25.000 32.000 16.000 0.029
13 25R3324B-1 25.000 33.000 24.000 0.052
14 25 x 35 x 24 25.000 35.000 24.000 0.062
15 WA 2025 25.000 35.000 30.000 0.080
16 PCJ162116 25.400 33.338 25.400 0.045
17 25UR3525A 25.500 35.000 24.500 0.056
18 WA 2028 26.000 40.000 26.000 0.098
19 28 x 33 x 17 28.000 33.000 17.000 0.020
20 28 x 44 x 24 28.000 44.000 24.000 0.118
21 7050 28.000 48.000 24.000 0.158
22 7050 Poly cage (25mm) 28.000 48.000 30.800 0.165
23 29 x 34 x 17 29.000 34.000 17.000 0.019
24 29 x 34 x 24 29.000 34.000 24.000 0.028
25 485P (SILVER PLATED – 2PIECE) 30.000 39.000 20.700 0.047
26 30 x 37 x 16 30.000 37.000 16.000 0.027
27 30 x 37 x 20 30.000 37.000 20.000 0.034
28 WA 2030 30.000 42.000 30.000 0.108
29 30 x 55 x 32 30.000 55.000 32.000  
30 32 x 42 x 18 32.000 42.000 18.000 0.049
31 32 x 52 x 25 32.000 52.000 25.000 0.180
32 32 x 52 x 31 32.000 52.000 31.000 0.210
33 486P (SILVER PLATED – 2PIECE) 36.000 46.000 20.700 0.065
34 K 37 x 57 x 30.5 37.000 57.000 30.500  
35 38 x 54 x 35 38.000 54.000 38.000 0.195
36 38 x 54 x 38 38.000 54.000 38.000 0.215
37 40 x 45 x 30 40.000 45.000 30.000  
38 40 x 45 x 33 40.000 45.000 33.000  
39 40 x 50 x 27 40.000 50.000 27.000 0.085
40 42 x 47 x 27 42.000 47.000 27.000 0.044
41 42 x 52 x 36 42.000 52.000 36.000 0.100
42 45 x 52 x 36 45.000 52.000 36.000 0.110
43 7220392 (45 x 53 x 21) 45.000 53.000 21.000 0.058
44 47 x 52 x 27 47.000 52.000 27.000 0.052
45 48 x 53 x 17 48.000 53.000 17.000 0.035
46 49 x 65 x 38 49.000 65.000 38.000 0.070
47 50 x 55 x 17 50.000 55.000 17.000 0.034
48 50 x 55 x 20 50.000 55.000 20.000 0.040
49 9885-50109 50.000 55.000 28.000 0.060
50 50 x 55 x 30 50.000 55.000 30.000 0.060
51 50 x 56 x 33 50.000 56.000 33.000  
52 K NU 2308 – AJP1 52.000 80.060 26.000 0.375
53 56 x 72 x 35 56.000 72.000 35.000 0.195
54 7220101 (57 x 63 x 42.5) 57.000 63.000 42.500 0.083
55 9885-58103 58.000 63.000 33.000 0.085
56 7220399 (58 x 65 x 35.5) 58.000 65.000 35.500 0.110
57 9810 ST 58.570 66.570 30.000 0.108
58 9810 AL 58.570 66.570 30.000 0.093
59 90-9009 60.000 66.000 23.000 0.065
60 K 60 x 66 x 54 60.000 66.000 54.000 0.155
61 9883-40107 60.000 68.000 25.000 0.095
62 K 60 x 68 x 53.8 60.000 68.000 53.800 0.205
63 62 x 68 x 21 62.000 68.000 21.000 0.055
64 80006 62.000 68.000 42.000 0.125
65 62 x 68 x 42 62.000 68.000 42.000 0.060
66 7220402 (62 x 70 x 40) 62.000 70.000 40.000 0.150
67 63.6 x 71.6 x 19.5 63.600 71.600 19.500 0.065
68 80005 63.600 71.600 38.500 0.115
69 K 65 x 73 x 30 65.000 73.000 30.000 0.115
70 K 67 x 75 x 36.7 67.000 75.000 36.700 0.175
71 70 x 76 x 40 70.000 76.000 40.000 0.135
72 70 x 78 x 19.8 70.000 78.000 19.800 0.082
73 70 x 78 x 37
(INA=F-87259,
FERSA=F 17053 K)
70.000 78.000 37.000 0.150
74 70 x 78 x 39 70.000 78.000 39.000 0.050
75 70 x 78 x 40 70.000 78.000 40.000 0.167
76 7220130 (70 x 78 x 43)
(INA=722013010,
INA=F-58637,
FERSA=F 17101 K)
70.000 78.000 43.000 0.205
77 70 x 78 x 46 70.000 78.000 46.000 0.196
78 7220408 (72 x 88 x 40)
(INA=F-204691,
FERSA=F 17076 K)
72.000 80.000 40.000 0.180
79 K 75 x 83 x 23 75.000 83.000 23.000 0.100
80 75 x 83 x 35 75.000 83.000 35.000 0.160
81 K 75 x 83 x 48 75.000 83.000 48.000 0.235
82 K 75 x 83 x 54.5 75.000 83.000 54.500 0.290
83 TN 771011
(INA=F-229852,
FERSA=F19087)
77.000 101.000 28.500 0.400
84 K 78 x 86 x 32.5 78.000 86.000 32.500 0.182
85 K 78 x 86 x 34.8 78.000 86.000 34.800 0.188
86 7220191 (80 x 88 x 34.5) 80.000 88.000 34.500 0.178
87 80 x 88 x 40 80.000 88.000 40.000 0.190
88 7220410 (80 x 88 x 46) 80.000 88.000 46.000 0.230
89 K 80 x 88 x 55 80.000 88.000 55.000 0.320
90 7220163 (82 x 90 x 49.5) 82.000 90.000 49.500 0.255
91 7220091 (82 x 94 x 36) 82.000 94.000 36.000 0.280
92 K 85 x 93 x 45.5 85.000 93.000 45.500 0.270
93 K 85 x 93 x 63
(INA F-227349,
FERSA=F 17091 K)
85.000 93.000 63.000 0.377
94 K 86 x 102 x 18 86.000 102.000 18.000 0.160
95 K 89 x 97 x 40.2
(INA=F-219518,
FERSA=F 17034 K)
89.000 97.000 40.200  
96 K 90 x 98 x 40 90.000 98.000 40.000 0.265
97 K 90 x 98 x 46
(INA=F-203030,
FERSA=F 17095 K)
90.000 98.000 46.000 0.288
98 K 90 x 98 x 49.8 90.000 98.000 49.800 0.325
99 K 90 x 98 x 54.5 90.000 98.000 54.500 0.345
100 7220411 (95 x 103 x 39.5) 95.000 103.000 39.500 0.230
101 K 95 x 103 x 60
(INA=F-227348,
FERSA=F 17092 K)
95.000 103.000 60.000 0.400
102 K 96 x 104 x 55
(INA=F-212874.01,
FERSA=F 17039 K)
96.000 104.000 55.000 0.375

Primary Use Cases

  • Automotive Transmissions: Widely used in gearboxes and planet carriers where space is at a premium and radial loads are high.
  • Power Tools: Supporting high-speed shafts in drills, saws, and grinders where a compact footprint is essential for ergonomics.
  • Internal Combustion Engines: Essential for connecting rod small ends, rocker arms, and camshaft supports.
  • Industrial Pumps and Compressors: Managing radial forces in compact fluid-handling equipment.
  • Office Equipment: Providing smooth, low-friction motion for rollers and pulleys in printers and copiers.

Frequently Asked Questions

1. Why use needle rollers instead of standard cylindrical rollers?
Needle rollers have a much smaller diameter relative to their length. This allows for a much lower radial cross-section, making them the only choice for designs where there isn’t enough room for a standard roller bearing.
2. Can needle roller bearings handle axial loads?
Standard radial needle roller bearings are designed to handle radial loads only. For axial loads, you would need to use a needle roller thrust bearing or a combined bearing design.
3. Do needle roller bearings always need an inner ring?
No. If the shaft can be hardened and ground to serve as a raceway, the needle rollers can run directly on it, which saves even more radial space and reduces costs.
4. Are these bearings suitable for high-speed rotation?
Yes, caged needle roller bearings can handle relatively high speeds because the cage prevents the rollers from rubbing against each other, reducing friction and heat.
5. What is the difference between “Drawn Cup” and “Solid Race” needle bearings?
Drawn cup bearings have a thin, pressed-steel outer shell and are used for more economical, lighter-duty tasks. Solid race (machined) bearings are much stronger and used for heavy-duty, high-precision industrial applications.

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