Bearing Steel High precision drawn cup needle roller bearings HK3220 on Electric Motor, Auto Mobiles, Appliances, Caster(bearing inner ring)
Description of BK Series:(bearing inner ring)
Needle roller bearing BK series only carry pure radial load and can not limit the axial displacement of shaft relative to the housing. It is important to ensure that inner ring axis and outer ring axis must be aligned during mounting the bearings.
Since one end of the close-end bearing is sealed, it is suitable for the end of shaft with bearing the small axial sliding force.
Picture:(bearing inner ring)
| Shaft Diameter (mm) | Bearing Designation | Boundary Dimensions(mm) | Basic Load Rating (N) | Limiting Speed (rpm) |
| Current Designation | Original Designation | Fw | D | C | Cr Dynamic | Cor Static | Grease | Oil |
| 3 | HK0306 | 7942/3 | 3 | 6 | 6 | 700 | 600 | 29000 | 45000 |
| HK0306TN1 | | 3 | 6.5 | 6 | 1230 | 840 | 27600 | 46000 |
| 4 | HK0408 | 7947/4K | 4 | 8 | 8 | 1500 | 1200 | 27000 | 40000 |
| HK0408TN1 | | 4 | 8 | 8 | 1400 | 1100 | 27000 | 40000 |
| 5 | HK0509 | | 5 | 9 | 9 | 2400 | 2200 | 22800 | 38000 |
| HK051010-Y | | 5 | 10 | 10 | 1600 | 1900 | 23400 | 39000 |
| 6 | HK0608 | 37941/6 | 6 | 10 | 8 | 2200 | 2100 | 23000 | 33000 |
| HK0609 | 47941/6 | 6 | 10 | 9 | 2200 | 2000 | 23000 | 33000 |
| HK0609TN1 | | 6 | 10 | 9 | 2700 | 2600 | 23000 | 33000 |
| HK061011 | 67941/6 | 6 | 10 | 11 | 2700 | 2700 | 23000 | 33000 |
| HK061012 | | 6 | 10 | 12 | 2800 | 2800 | 23000 | 33000 |
| HK6×10×13.5 | | 6 | 10 | 13.5 | 3000 | 3100 | 23000 | 33000 |
| HK061208-Y | | 6 | 12 | 8 | 1900 | 1500 | 23000 | 33000 |
| FC68680.1 | | 6 | 12.35 | 11.5 | 3400 | 3000 | 23000 | 33000 |
| 6.35 | SCE45 | | 6.35 | 11.112 | 7.94 | 2200 | 1900 | 23000 | 33000 |
| SCE 47PP | | 6.35 | 11.11 | 11.11 | 1800 | 1500 | 23000 | 33000 |
| SCE47 | | 6.35 | 11.112 | 11.11 | 3900 | 3600 | 23000 | 33000 |
| SCE 49PP | | 6.35 | 11.112 | 14.29 | 3200 | 3100 | 23000 | 33000 |
| 7 | HK0709 | 47941/7 | 7 | 11 | 9 | 2400 | 2300 | 21000 | 30000 |
| HK7×12×8 | | 7 | 12 | 8 | 2600 | 2200 | 21000 | 30000 |
| HK071209 | | 7 | 12 | 9 | 2700 | 2300 | 21000 | 30000 |
| 7.938 | SCE 57 | | 7.938 | 12.7 | 11.11 | 3700 | 4000 | 21000 | 30000 |
| 8 | HK0808 | 37941/8 | 8 | 12 | 8 | 2600 | 2700 | 18000 | 27000 |
| HK0808TN1 | | 8 | 12 | 8 | 2400 | 2400 | 18000 | 27000 |
| HK0810 | 57941/8 | 8 | 12 | 10 | 3200 | 3500 | 18000 | 27000 |
| HK0810Y | | 8 | 12 | 10 | 2500 | 2550 | 18000 | 27000 |
| HK0810-RS | | 8 | 12 | 10 | 2400 | 1400 | 18000 | 27000 |
| HK0812 | | 8 | 12 | 12 | 4200 | 3700 | 18000 | 27000 |
| HK081408 | | 8 | 14 | 8 | 2000 | 2400 | 18000 | 27000 |
| HK081410 | | 8 | 14 | 10 | 3000 | 3200 | 18000 | 27000 |
| HK081412 | 37942/8 | 8 | 14 | 12 | 4500 | 4300 | 18000 | 27000 |
Type:(bearing inner ring)
