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Manufacturer NSK / RHP
TAC C
Ball Screw Support
NSK 45TAC75C Ball Screw Support Bearing
Availability
Confirm at quotation
NSK / RHP · TAC C · Ball Screw Support · 45TAC75C
Bore (d)
45 mm
OD (D)
75 mm
Width (B)
15 mm
Contact angle
60°
Dynamic load Ca
57 kN
Static axial load
41.5 kN
Limiting speed
3700 min-1
- Manufacturer
- NSK / RHP
- Product Family
- NSK Ball Screw Support Bearings
- Series
- TAC C
- Designation
- 45TAC75C
- Configuration
- Ball Screw Support
NSK 45TAC75C is a TAC C ball screw support bearing (45 x 75 x 15 mm) for heavy-duty CNC feed mechanisms, large machining centres and high-rigidity ball screw support applications. Catalogue dynamic load Ca: 57 kN.
- Product Type
- Ball screw support bearing
- Industry
- Machine tools, precision automation
Why Source Through Golden Bearing Company
Authorised industrial distributor
Engineering Support
Duty review, bore selection, and application engineering assistance
Authorised Manufacturer Data
Specifications published exactly as manufacturer catalogue data
Technical Assistance
Configuration, interchangeability, and spare element guidance
Product Overview
NSK 45TAC75C is a TAC C high-rigidity angular-contact thrust ball bearing for ball screw support at machine-tool feed axes. The 60-degree contact angle prioritises axial stiffness for CNC positioning accuracy. Catalogue dimensions are 45 x 75 x 15 mm.
Commercial Identification
Authoritative procurement identifiers for ERP, RFQ, and purchase order entry. Copy values directly where shown.
- Manufacturer
- NSK / RHP
- Product Family
- NSK Ball Screw Support Bearings
- Series
- TAC C
- Designation
- 45TAC75C
- Configuration
- Ball Screw Support
Selection Guidance
Engineering checkpoints when specifying NSK 45TAC75C for a ball screw support application.
Engineering Specifications
NSK Super Precision Bearings Catalogue values for NSK 45TAC75C. Parameters not tabulated for this size are omitted rather than estimated.
Basic dimensions and identification
| NSK designation | 45TAC75C |
|---|---|
| Series | TAC C |
| Bore diameter (d) | 45 mm |
| Outside diameter (D) | 75 mm |
| Width (B) | 15 mm |
| Contact angle | 60° |
Load ratings
| Basic dynamic load Ca | 57 kN |
|---|---|
| Limiting static axial load | 41.5 kN |
| Basic dynamic load Ca (2 rows) | 67 kN |
| Basic dynamic load Ca (3 rows) | 89.5 kN |
| Limiting static axial load (2 rows) | 114 kN |
| Limiting static axial load (3 rows) | 170 kN |
Speed, mass and lubrication
| Limiting speed (grease) | 3700 min-1 |
|---|---|
| Limiting speed (oil) | 4900 min-1 |
| Mass (approx.) | 0.27 kg |
| Recommended grease quantity | 3.9 g/brg |
Preload and axial rigidity
| Preload class | H |
|---|---|
| Preload (duplex DB/DF) | 3100 N |
| Axial rigidity (duplex DB/DF) | 1170 N/um |
| Starting torque, grease (duplex DB/DF) | 0.2 Nm |
Dimensions
Mounting envelope and abutment shoulders for layout, housing design and screw-end integration.
Bore (d)
45 mm
Outside diameter (D)
75 mm
Width (B)
15 mm
| Bore diameter (d) | 45 mm |
|---|---|
| Outside diameter (D) | 75 mm |
| Width (B) | 15 mm |
| Chamfer r min / r1 min | 1 / 0.6 mm |
| Abutment shoulder da min | 54 mm |
| Abutment shoulder Da max | 67 mm |
| Abutment shoulder Db max | 68 mm |
| Abutment shoulder db min | 54 mm |
NSK Catalogue Reference
Authoritative source for the engineering values published on this page.
Published data basis
Engineering values on this page are taken from the NSK Super Precision Bearings Catalogue for NSK 45TAC75C. Parameters not shown require NSK manufacturer catalogue verification before design sign-off. Reference to NSK 45TAC75C supports engineering identification and quotation only.
Applications
Typical NSK TAC C ball screw support applications for NSK 45TAC75C.
Ball screw support
Precision feed axis
CNC machine tools
Machine-tool feed drives
High axial rigidity
Configuration and Arrangement
Series-specific mounting, preload and arrangement context for NSK 45TAC75C.
Arrangement and mounting
Duplex DB/DF preload, axial rigidity and starting torque values are catalogue ratings for the stated arrangement, not for a single unmounted bearing.
Preload
Catalogue preload class H. Duplex DB/DF preload: 3100 N.
TAC C series role
60-degree contact angle angular-contact thrust bearing for high axial rigidity in machine-tool ball screw feed mechanisms. Universal SU arrangement supports duplex, triplex or quadruple combinations per NSK catalogue guidance.
Frequently Asked Questions
Engineering and procurement answers for specification review and quotation.
What is NSK 45TAC75C?
NSK 45TAC75C is a TAC C ball screw support bearing - High-rigidity angular contact thrust ball bearing. It is used at the fixed or floating end of precision ball screw drives where axial rigidity and accurate screw guidance are required.
What are the dimensions of NSK 45TAC75C?
Catalogue dimensions for NSK 45TAC75C are 45 x 75 x 15 mm (bore x OD x width). Mounting shoulder dimensions are listed in the Dimensions section when tabulated in the NSK Super Precision Bearings Catalogue.
What is the contact angle of NSK 45TAC75C?
NSK 45TAC75C uses a 60° contact angle per the NSK Super Precision Bearings Catalogue for the TAC C series.
What is the limiting speed of NSK 45TAC75C?
Grease lubrication limiting speed for NSK 45TAC75C is 3700 min-1. Oil lubrication limiting speed: 4900 min-1.
What is the dynamic load rating of NSK 45TAC75C?
Catalogue basic dynamic load Ca for NSK 45TAC75C is 57 kN. Multi-row arrangement ratings are shown separately when tabulated.
What preload applies to NSK 45TAC75C in duplex mounting?
Catalogue duplex DB/DF preload for NSK 45TAC75C is 3100 N with axial rigidity 1170 N/um and starting torque 0.2 Nm. These are arrangement ratings, not single-bearing properties.
How do I order or identify NSK 45TAC75C?
Base designation NSK 45TAC75C must be extended with seal, arrangement, preload and accuracy suffixes for a complete ordering code. Send existing marking, screw diameter, speed and application duty for engineering identification.
Request an Engineering Quote
Share NSK 45TAC75C designation, screw diameter, lead, speed, axial load and application context for ball screw support bearing engineering quotation.