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Product Details:
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| Model: | NKI 40/20 | Type: | Needle Roller Bearing |
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| Size: | 40*55*20mm | Application: | Electric Car |
| Material: | Bearing Steel | HS Code: | 8482400000 |
| High Light: | Electric Car Steel Roller Bearings,NA Steel Roller Bearings,NKI 40/20 |
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Are needle bearings better than bushings ?
They're lower friction, the cam lasts longer, and the needle bearings last longer. The camshaft and lifter wheel will last three to four times longer with a good needle-bearing than it will with a bushed lifter.
How long do needle bearings last ?
They're lower friction, the cam lasts longer, and the needle bearings last longer. The camshaft and lifter wheel will last three to four times longer with a good needle-bearing than it will with a bushed lifter.
| DIMENSIONS/mm |
without an inner periphery |
without an inner periphery |
the inner circumference |
the inner circumference |
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| Diameter | ||||||
| dr | d | D | ||||
| 45 | 40 | 55 | TAF 455520 | NK 45/20 | TAFI 405520 | NKI 40/20 |
| 45 | 40 | 55 | TAF 455530 | NK 45/30 | TAFI 405530 | NKI 40/30 |
| 47 | 42 | 57 | TAF 474720 | NK 47/20 | TAFI 425720 | NKI 42/20 |
| 47 | 42 | 57 | TAF 475730 | NK 47/30 | TAFI 425730 | NKI 42/30 |
| 48 | 40 | 62 | RNA 4908 | RNA 4908 | NA 4908 | NA 4908 |
| 48 | 40 | 62 | RNA 6908 | RNA 6908 | NA 6908 | NA 6908 |
| 50 | 45 | 62 | TAF 506225 | NK 50/25 | TAFI 456225 | NKI 45/25 |
| 50 | 45 | 62 | TAF 506235 | NK 50/35 | TAFI 456235 | NKI 45/35 |
| 52 | 45 | 68 | RNA 4909 | RNA 4909 | NA 4909 | NA 4909 |
| 52 | 45 | 68 | RNA 6909 | RNA 6909 | NA 6909 | NA 6909 |
| 55 | 50 | 68 | TAF 556825 | NK 55/25 | TAFI 506825 | NKI 50/25 |
| 55 | 50 | 68 | TAF 556835 | NK 55/35 | TAFI 506835 | NKI 50/35 |
| 58 | 50 | 72 | RNA 4910 | RNA 4910 | NA 4910 | NA 4910 |
| 58 | 50 | 72 | RMA 6910 | RNA 6910 | NA 6910 | NA 6910 |
| 60 | 55 | 72 | TAF 607225 | NK 60/25 | TAFI 557225 | NKI 55/25 |
| 60 | 55 | 72 | TAF 607235 | NK 60/35 | TAFI 557235 | NKI 55/35 |
| 63 | 55 | 80 | RNA 4911 | RNA 4911 | NA 4911 | NA 4911 |
| 63 | 55 | 80 | RNA 6911 | RNA 6911 | NA 6911 | NA 6911 |
| 65 | - | 78 | TAF 657825 | NK 65/25 | - | - |
| 65 | - | 78 | TAF 657835 | NK 65/35 | - | - |
| 68 | 60 | 82 | TAF 688225 | NK 68/25 | TAFI 608225 | NKI 60/25 |
| 68 | 60 | 82 | TAF 688235 | NK 68/35 | TAFI 608235 | NKI 60/35 |
| 68 | 60 | 85 | RNA 4912 | RNA 4912 | NA 4912 | NA 4912 |
| 68 | 60 | 85 | RNA 6912 | RNA 6912 | NA 6912 | NA 6912 |
| 70 | - | 85 | TAF 708525 | NK 70/25 | - | - |
| 70 | - | 85 | TAF 708535 | NK 70/35 | - | - |
| 72 | 65 | 90 | RNA 4913 | RNA 4913 | NA 4913 | NKI 60/25 |
| 72 | 65 | 90 | RNA 6913 | RNA 6913 | NA 6913 | NKI 60/35 |
| 73 | 65 | 90 | TAF 739025 | NK 73/25 | TAFI 659025 | NA 4912 |
| 73 | 65 | 90 | TAF 739035 | NK 73/35 | TAFI 659035 | NA 6912 |
| 75 | - | 92 | TAF 759225 | NK 75/25 | - | - |
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Tel: +8617312783296
