NKMB 6300 series bearings are built for heavy-duty applications requiring higher load capacity and long service life. Designed for demanding environments, they are commonly used in industrial machinery, construction equipment, and agricultural systems.
Backed by over 20 years of manufacturing expertise, NKMB ensures strong durability and stable performance under heavy loads. We offer OEM and custom bearing solutions, flexible order quantities, and efficient global delivery to support your business needs with reliability and cost efficiency.
| Bearing No. | Bore diameter | Outer diameter | Width | Radius | Basic rated load | Limit speed | BallComplement | Weight | |||
| D | D | W | R | Kg/pc | |||||||
| Mm Inch | Mm Inch | Mm Inch | Mm Inch | Dynamic load | Static load | Grease | oil | No. | Size. | ||
| C | CO | R/min | R/min | mm | |||||||
| 635 | 5\.1969 | 19\ .7480 | 6\ .2362 | 0.3\ .012 | 2.34 | 0.885 | 34000 | 40000 | 9 | 2.381 | 0.008 |
| 636 | 6\.2362 | 22\.8661 | 7\.2765 | 0.3\.012 | 3.29 | 1.36 | 30000 | 36000 | 7 | 3.969 | 0.014 |
| 637 | 7\.2756 | 26\1.0236 | 9\.3543 | 0.3\.012 | 3.34 | 1.41 | 28000 | 48000 | 7 | 3.969 | 0.025 |
| 638 | 8\.3149 | 28\1.1024 | 9\.3543 | 0.3\.012 | 4.16 | 1.78 | 28000 | 42000 | 7 | 4.763 | 0.028 |
| 639 | 9\.3543 | 30\1.1811 | 10\.3937 | 0.6\.024 | 5.12 | 2.39 | 24000 | 30000 | 10 | 4.763 | 0.036 |
| 6300 | 10\ .3937 | 35\ 1.3780 | 11\ .4331 | 0.6\ .024 | 8.2 | 3.5 | 15000 | 21000 | 7 | 6.35 | 0.053 |
| 6301 | 12\ ,4724 | 37\ 1.4567 | 12\ .4724 | 1.0\ .039 | 9.7 | 4.2 | 14000 | 20000 | 6 | 7.938 | 0.06 |
| 6302 | 15\.5906 | 42\ 1.6535 | 13\ .5118 | 1.0\ .039 | 11.4 | 5.45 | 13000 | 18000 | 7 | 7.938 | 0.082 |
| 6303 | 17\ ,6693 | 47\ 1.8504 | 14\ .5512 | 1.0\ .039 | 13.5 | 6.55 | 12000 | 17000 | 7 | 8.731 | 0.115 |
| 6304 | 20\ .7874 | 52\ 2.0472 | 15\.5906 | 1.1\ .043 | 15.9 | 7.9 | 11000 | 15000 | 7 | 9.525 | 0.144 |
| 6305 | 25\ ,9843 | 62\ 2.4409 | 17\ .6693 | 1.1\ .043 | 21.2 | 10.9 | 10000 | 13000 | 7 | 11.5 | 0.2193 |
| 6306 | 30\ 1.1811 | 72\ 2.8346 | 19\ .7480 | 1.1\ .043 | 26.7 | 15 | 8000 | 10000 | 8 | 11.906 | 0.3498 |
| 6307 | 35\ 1.3780 | 80\ 3.1496 | 21\ .8268 | 1.5\ .059 | 33.5 | 19.1 | 6800 | 8000 | 8 | 13.494 | 0.4542 |
| 6308 | 40\ 1.5748 | 90\ 3.5433 | 23\ .9055 | 1.5\ .059 | 40.5 | 24 | 5800 | 7200 | 8 | 15.081 | 0.6394 |
| 6309 | 45\ 1.7717 | 100\ 3.9370 | 25\ .9843 | 1.5\ .059 | 53 | 32 | 5000 | 6200 | 8 | 17.463 | 0.8363 |
| 6310 | 50\ 1.9685 | 110\ 4.3307 | 27\ 1.0630 | 2.0\ .079 | 62 | 38.5 | 4400 | 5500 | 8 | 19.05 | 1.0822 |
| 6311 | 55\ 2.1654 | 120\ 4.7244 | 29\ 1.1417 | 2.0\ .079 | 74.1 | 45 | 5800 | 6800 | 8 | 19.844 | 1.35 |
