Machined Brass Cage 75BTR10S Super Precision Angular Contact Thrust Ball Bearings
The 75BTR10S Ultra-precision angular contact thrust ball bearings are designed for high-load, high-speed applications with stringent requirements for axial runout, and are widely used in precision machine tool spindles, ball screws, industrial robot joints, aero-engine accessory transmission systems, and high-precision centrifuges.
The 75BTR10S bearing is a Super Precision Angular Contact Thrust Ball Bearings, High-Speed with an inner diameter of 75 mm , an outer diameter of 115 mm, a width of 36 mm. S = bearing steel (SUJ2) rings, S = bearing steel (SUJ2) rolling mlement. Its dynamic radial rated load is approximately 32500 N, its static radial rated load is approximately 65500 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
75BTR10S bearings ( 75 mm x 115 mm x 36 mm) have the advantages of perfect balance of rotational accuracy, speed and rigidity, and are therefore widely used in the Machine tools, ball screw, aerospace, medical equipment.
| Part Number | 75BTR10S |
| Interchangeable | NSK 75BTR10S |
| Contact Angle [°] | 40 |
| Bearing Type | Super Precision Angular Contact Thrust Ball Bearings, High-Speed |
| Dimension series | 10 = 10 Series bore and outside diameter, special width |
| Type | BTR |
| Bearing Mass - m [lb] | 1.3977 |
| Cr Radial Dynamic [lbf] | 7306 |
| C0r Radial Static [lbf] | 14724 |
| nB Speed ratings (grease) [rpm] | 6900 |
| nG Speed ratings (oil) [rpm] | 9000 |
| d φ Inside [inch] | 2.9527 |
| D Φ Outside [inch] | 4.5276 |
| 2B Total Width [inch] | 1.4173 |
| r min Chamfer [inch] | 0.0433 |
| r1 min Chamfer [inch] | 0.0236 |
| a Effective Load Center [inch] | 1.9055 |
| Pa Permissible Axial Load [lbf] | 8205 |
The core design of ultra-precision angular contact thrust ball bearings lies in their large contact angle (typically 60°) and high-precision matching steel balls, which can simultaneously withstand heavy axial loads and radial loads. With optimized raceway geometry and cage, they achieve extremely low friction and high rigidity, ensuring that they maintain nanometer-level rotational accuracy and excellent axial positioning capability during high-speed operation.
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