80TAC03DT85SUMPN5D bearings ( 80 mm x 170 mm x 39 mm) have the advantages of High axial stiffness and load-bearing capacity, 60° contact angle design, pre-installed and pre-loaded for easy installation, optional sealing for maintenance-free operation, and are therefore widely used in the Machine tool ball screws, machining centers, automated equipment, robots, precision measuring devices.

| Part Number | 80TAC03DT85SUMPN5D |
| Bearing Type | Angular Contact Super Precision Thrust Ball Bearings, TAC 03 Series for Ball Screw Support (High-Load Drive) |
| Internal design | D = Contact angle 55 ° |
| Contact angle - α | 55 ° |
| Type | TAC |
| Dimension series | 03 = 03 Series |
| Preload | M = Medium preload |
| Arrangement row | One |
| Arrangement | SU = Universal (One-row) |
| SU Bearing Mass - m [lb] | 8.3775 |
| DB/DF Arrangement H preload [lbf] | 1803 |
| DB/DF Arrangement H Axial Rigidity | 1390 N/µm |
| DB/DF Arrangement H Starting Torque | 1.5 N・m |
| DB/DF Arrangement H Measured Axial Clearance | -33 µm |
| Speed ratings (grease) - nB | 2369 min–1 |
| Speed ratings (oil) - nG | 2961 min–1 |
| Recommended Grease Quantities - CC | 85 g/brg |
| Dimension | |
| d φ Inside [inch] | 3.1496 |
| D Φ Outside [inch] | 6.6929 |
| B Width [inch] | 1.5354 |
| r min Chamfer [inch] | 0.0827 |
| r1 min Chamfer [inch] | 0.0433 |
| d1 Shoulder [inch] | 3.8779 |
| d2 Shoulder [inch] | 4.8661 |
| D1 Shoulder/Recess [inch] | 5.0669 |
| D2 Shoulder/Recess [inch] | 6.2008 |
| Dynamic Axial Capacity | |
| Ca 1 row [lbf] | 68508 |
| Ca 2 row [lbf] | 111193 |
| Ca 3 row [lbf] | 148325 |
| Ca 4 row [lbf] | 180924 |
| Ca 5 row [lbf] | 211259 |
| Static Axial Capacity | |
| C0a 1 row [lbf] | 87569 |
| C0a 2 row [lbf] | 174150 |
| C0a 3 row [lbf] | 262924 |
| C0a 4 row [lbf] | 348346 |
| C0a 5 row [lbf] | 436002 |
| Other Arrangement | 1 rows: DB(<>): 80TAC03DT85DBMPN5D DF(><): 80TAC03DT85DFMPN5D 2 rows: DT(<<): 80TAC03DT85DTMPN5D DFD(><<): 80TAC03DFD85DFDMPN5D DFF(>><<): 80TAC03DFF85DFFMPN5D DBD(<<>): 80TAC03DBD85DBDMPN5D DBB(<<>>): 80TAC03DBB85DBBMPN5D 3 rows: DFT(><<<): 80TAC03DFT85DFTMPN5D DFFD(>><<): 80TAC03DFFD85DFFDMPN5D DFFF(>>><<<): 80TAC03DFFF85DFFFMPN5D DBT(<<<>): 80TAC03DBT85DBTMPN5D DBBD(<<<>>): 80TAC03DBBD85DBBDMPN5D DBBB(<<<>>>): 80TAC03DBBB85DBBBMPN5D 4 rows: DFTD(><<<<): 80TAC03DFTD85DFTDMPN5D DFFT(>><<<<): 80TAC03DFFT85DFFTMPN5D DBTD(<<<<>): 80TAC03DBTD85DBTDMPN5D DBBT(<<<<>>): 80TAC03DBBT85DBBTMPN5D 5 rows: DFTT(><<<<<): 80TAC03DFTT85DFTTMPN5D DBTT(<<<<<>)80TAC03DBTT85DBTTMPN5D |
The 80TAC03DT85SUMPN5D Ball screw support bearings are typically composed of high-precision angular contact ball bearings paired back-to-back (DB) or in series (DT) configurations. They feature a small contact angle (15° or 20°) and high-rigidity cages (phenolic resin or brass) on both inner and outer rings, achieving a precision grade of P4 or higher. Some models integrate seals and lubrication holes, forming a preload unit.
Ball screw support bearings offer extremely high axial rigidity and load-bearing capacity, accurately withstanding bidirectional axial loads in screw drives. The back-to-back configuration provides anti-overturning moment capability, ensuring positioning accuracy. The preload design eliminates axial backlash, achieving backlash-free, low-friction operation with low heat generation, making them suitable for high-speed feed. They are factory-installed and ready to use, simplifying installation and adjustment.















