Chrome steel balls Specification
Chrome Steel 52100 is a universal material for many applications. Chrome steel balls have an excellent surface quality and high load bearing. TRD produces balls that through statistical process control, assures tolerance accuracy, fine surface finish and a consistent high quality. Our chrome steel balls are available in fractional, decimal and millimeter sizes.
| The specification of bearing steel ball | |||
| Diameter (d) | Diameter (d) | ||
| Inch | Millimeter | Inch | Millimeter |
| 2 | 8.5 | ||
| 3/32 | 2.381 | 11/32 | 8.731 |
| 2.5 | 9 | ||
| 3 | 23/64 | 9.132 | |
| 3.1 | 3/8 | 9.525 | |
| 1/8 | 3.175 | 13/32 | 10.319 |
| 3.5 | 15/32 | 11.006 | |
| 5/32 | 3.969 | 7/12 | 11.113 |
| 4 | 31/64 | 12.303 | |
| 4.5 | 1/2 | 12.70 | |
| 3/16 | 4.763 | 9/16 | 14.28 |
| 5 | 9/32 | 15.81 | |
| 5.5 | 5/8 | 15.875 | |
| 7/32 | 5.556 | 11/16 | 17.463 |
| 15/64 | 5.953 | 18 | |
| 6 | 23/32 | 18.256 | |
| 1/4 | 6.35 | 3/4 | 19.05 |
| 6.5 | 25/32 | 19.844 | |
| 7 | 20 | ||
| 9/32 | 7.144 | 27/32 | 21.431 |
| 7.5 | 7/8 | 22.225 | |
| 5/16 | 7.938 | 31/32 | 24.606 |
| 8 | 1 | 25.4 | |
| 5/8 | 15.8750 | 1 3/4 | 44.4500 |
| 21/32 | 16.6688 | 45.0000 | |
| 11/16 | 17.4625 | 1 7/8 | 47.6250 |
| 23/32 | 18.2562 | 50.0000 | |
| 3/4 | 19.0500 | 2 | 50.8000 |
| 13/16 | 20.6375 | 2 1/8 | 53.9750 |
| 7/8 | 22.2250 | 55.0000 | |
| 29/32 | 23.0188 | 2 1/4 | 57.1500 |
| 15/16 | 23.8125 | 60.0000 | |
| 1 | 25.400 | 2 3/8 | 60.3250 |
| 1 1/16 | 26.9875 | 2 1/2 | 63.5000 |
| 1 1/8 | 28.5750 | 65.0000 | |
| 30 | 2 3/4 | 69.8500 | |
| 1 3/16 | 30.1625 | 70.0000 | |
| 1 1/4 | 31.7500 | 75.0000 | |
| 32 | 3 | 76.2000 | |
| 1 5/16 | 33.3375 | 80.0000 | |
| 34 | 3 1/2 | 88.9000 | |
| 1 3/8 | 34.9250 | 90.0000 | |
| 35 | 100.0000 | ||
| Grade of tolerance and technology requirement | |||||
| Grade | Ball diameter variation | Spherical deviation | Ball surface roughness | Ball diameter variation | Basic diameter tolerance |
| Vdws | ?Sph | Ra | Vdwl | Tdn | |
| Not exceed not over | |||||
| um | |||||
| 10 | 0.25 | 0.25 | 0.025 | 0.5 | * |
| 16 | 0.4 | 0.4 | 0.032 | 0.8 | * |
| 20 | 0.5 | 0.5 | 0.05 | 1 | * |
| 28 | 0.7 | 0.7 | 0.05 | 1.5 | * |
| 40 | 1.0 | 1.0 | 0.08 | 2 | * |
| 60 | 1.5 | 1.5 | 0.10 | 3 | * |
| 100 | 2.5 | 2.5 | 0.125 | 5 | 12.5 |
| 200 | 5 | 5 | 0.2 | 10 | 25 |
| 500 | 13 | 13 | * | 25 | 50 |
| 1000 | 25 | 25 | * | 50 | 125 |
ABOUT US
Our Steel Ball Factory mainly focuses on high precision miniature steel ball manufacture and development. High precision stainless steel ball, chrome steel ball, glass ball and plastic ball, especially the size range from 0.5mm to 6.0mm, the precision up to Grade 5, are the main products we engage in.