Cylindrical Rollers
The precision of bearing rollers is the most important factor that affects the bearing rotational accuracy. The general application of each precision grade of bearing rollers showing as in the below table:
Precision grade of bearing rollers | Precision grade of the Bearing |
Class 0 | Class P2 |
Class Ⅰ | Class P4 |
Class Ⅱ | Class P5 |
Class Ⅲ | Class P6、P0 |
The following are the main parameters of bearing rollers and the accuracy that we can achieve:
1. Diameter variation/ set: 0.003mm;
2. End face roughness: 0.1;
3. Raceway surface roughness: 0.08 (after superfinishing), 0.16 (without superfinishing)
4. Roundness: 0.001mm;
5. Profile: Logarithmic profile.
Some low-noise bearings also must be assembled with bearing rollers with precision grade 0 or I.
Because it is not easy to purchase high precision bearing rollers in the market and to meet the needs of high precision bearings of our own, we set up our own bearing rollers production lines.
For years of technical exploration and innovation, we have full experience of the manufacturing technology in grade 0 / 1 cylindrical rollers and have achieved to grind the raceway surface into the logarithmic profile. This shape is the most ideal for the load distribution and self-lubricating of cylindrical rollers.
TEDIN has precision measuring equipment: roundness measuring meter, profile measuring meter, high precision altimeter, and harness measuring meter, for tests on cylindrical rollers’ roundness, profile, and roughness, height, and hardness, etc.
Test results of cylindrical roller’s profile (logarithmic curve)
Test Results of cylindrical roller’s roundness (Class I)
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| Roller Type: | Tapered Rollers for TRB, Cylindrical Rollers for CRB |
| Diameter Range: | φ 10 - φ 160mm |
| Material: | GCr15, GCr15SiMn, Case-hardened steel G20Cr2Ni4A |
| Profile of raceway surface: | Logarithmic profile, crowned profile |
| Diameter Variation/ group: | 0.003mm |
| Roughness (Raceway surface): | Ra 0.08 |
| Roundness: | 0.001mm |
| Application: | rolling mills, wind turbines, crushers, railway, machine tools, etc. |
| Full Test Reports: | Raw Material: Chemical composition, NDT. Heat Treatment: Hardness, case-hardened depth. Logarithmic Profile: Inspection report; Full test report of Geometric Requirements: dimensions, angle, SR, chamfer, tolerance, roughness, roundness, etc. |
