TAC45-2T85SUC8PN5D Bore 45 Mm, High Precision Angular Contact Thrust Ball Bearings TAC Series For Ball Screw Support
The TAC45-2T85SUC8PN5D Ball screw support bearings are widely used in the feed drive systems of CNC machine tools, specifically including: machining centers (X/Y/Z axis screw support), CNC lathes (Z-axis), EDM machines, precision grinding machines, industrial robots (linear modules), and semiconductor equipment (wafer positioning platforms).
The TAC45-2T85SUC8PN5D bearing is a High precision Angular Contact Thrust Ball Bearings TAC Series for Ball Screw Support with an inner diameter of 45 mm , an outer diameter of 110 mm, a width of 27 mm. It typically uses PN5D = (ISO Class 5) grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. open type type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
TAC45-2T85SUC8PN5D bearings ( 45 mm x 110 mm x 27 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 | TAC45-2T85SUC8PN5D |
| Bearing Type | High precision Angular Contact Thrust Ball Bearings TAC Series for Ball Screw Support |
| Application | Electric Injection Molding Machines |
| Interchangeable | NSK TAC45-2T85SUC8PN5D |
| Internal design | A |
| Design | TAC |
| Preload | C8 = standard preload |
| Arrangement row | One |
| Series | TAC series (TAC..T85SUC8PN5D) |
| Rows NO. | One |
| Arrangement | SU = universal (single row) |
| Cage | T85 = polyamide resin cage |
| Seal | open type |
| Accuracy class | PN5D = (ISO Class 5) |
| Dimension and weight | |
| Inside - d φ [inch] | 1.7717 |
| Outside - D Φ [inch] | 4.3307 |
| Width - B [inch] | 1.0630 |
| Chamfer - r min [inch] | 0.0787 |
| Chamfer - r1 min [inch] | 0.0394 |
| d1 [inch] | 2.3740 |
| d2 [inch] | 2.9764 |
| D1 [inch] | 3.3268 |
| D2 [inch] | 3.9724 |
| Contact angle - α [°] | 50 |
| Dynamic Axial SU - Ca [lbf] | 33349 |
| Limiting Axial Load SU [lbf] | 25636 |
| Speed ratings (grease) - nB [min–1] | 2406 |
| Speed ratings (oil) - nG [min–1] | 3223 |
| Other Arrangement | DB(<>): TAC45-2T85DBC8PN5D DF(><): TAC45-2T85DFC8PN5D DT(<<): TAC45-2T85DTC8PN5D DFD(>><): TAC45-2T85DFDC8PN5D DBD(<<>): TAC45-2T85DBDC8PN5D DTD(<<<): TAC45-2T85DTDC8PN5D DFF(>><<): TAC45-2T85DFFC8PN5D DBB(<<>>): TAC45-2T85DBBC8PN5D DFT(>>><): TAC45-2T85DFTC8PN5D DBT(<<<>): TAC45-2T85DBTC8PN5D |
The TAC45-2T85SUC8PN5D 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.
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