Machined Brass Cage 220TAC29D+L Super Precision Angular Contact Thrust Ball Bearings
The 220TAC29D+L 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 220TAC29D+L bearing is a Super Precision Angular Contact Thrust Ball Bearings, Double-Direction with an inner diameter of 220 mm , an outer diameter of 300 mm, a width of 96 mm. Bearing steel (SUJ2) rings, Bearing steel (SUJ2) rolling mlement. Its dynamic axial rated load is approximately 209252 N, its static axial rated load is approximately 929486 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
220TAC29D+L bearings ( 220 mm x 300 mm x 96 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 | 220TAC29D+L |
| Interchangeable | NSK 220TAC29D+L |
| Contact Angle [°] | 60 |
| Bearing Type | Super Precision Angular Contact Thrust Ball Bearings, Double-Direction |
| Spacer | L = Inner ring spacer |
| Dimension series | 29D = For combination with NN39 and NN49 series |
| Type | TAC |
| Bearing Mass - m [lb] | 37.4782 |
| Ca Dynamic Axial [lbf] | 47039 |
| C0a Static Axial [lbf] | 208948 |
| nB Speed ratings (grease) [rpm] | 1761 |
| nG Speed ratings (oil) [rpm] | 1960 |
| d φ Inside [inch] | 8.6614 |
| D Φ Outside [inch] | 11.8110 |
| T Inner Ring Width [inch] | 3.7795 |
| C Outer Ring Width [inch] | 1.8898 |
| r min Chamfer [inch] | 0.0827 |
| r1 min Chamfer [inch] | 0.0433 |
| ra max Fillet Radius [inch] | 0.0787 |
| rb max Fillet Radius [inch] | 0.0394 |
| da Abutment Dimensions Shaft [inch] | 9.8425 |
| Da Abutment Dimensions Housing [inch] | 11.2992 |
| Pa Permissible Axial Load [lbf] | 129503 |
| Preload (C6) [lbf] | 257 |
| Preload (C7) [lbf] | 1108 |
| Preload (C8) [lbf] | 2871 |
| Axial rigidity (C6) [N/µm] | 1606 |
| Axial rigidity (C7) [N/µm] | 2595 |
| Axial rigidity (C8) [N/µm] | 3599 |
| Measured axial clearance (C6) [µm] | -3 |
| Measured axial clearance (C7) [µm] | -10 |
| Measured axial clearance (C8) [µm] | -20 |
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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