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Manufacturer NSK / RHP
TAC C
Ball Screw Support
NSK 40TAC72C Ball Screw Support Bearing
Availability
Confirm at quotation
NSK / RHP · TAC C · Ball Screw Support · 40TAC72C
Bore (d)
40 mm
OD (D)
72 mm
Width (B)
15 mm
Contact angle
60°
Dynamic load Ca
52 kN
Static axial load
40 kN
Limiting speed
4100 min-1
- Manufacturer
- NSK / RHP
- Product Family
- NSK Ball Screw Support Bearings
- Series
- TAC C
- Designation
- 40TAC72C
- Configuration
- Ball Screw Support
NSK 40TAC72C is a TAC C ball screw support bearing (40 x 72 x 15 mm) for CNC machine tool feed drives, machining centre ball screw supports and precision servo positioning axes. Catalogue dynamic load Ca: 52 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 40TAC72C 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 40 x 72 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
- 40TAC72C
- Configuration
- Ball Screw Support
Selection Guidance
Engineering checkpoints when specifying NSK 40TAC72C for a ball screw support application.
Engineering Specifications
NSK Super Precision Bearings Catalogue values for NSK 40TAC72C. Parameters not tabulated for this size are omitted rather than estimated.
Basic dimensions and identification
| NSK designation | 40TAC72C |
|---|---|
| Series | TAC C |
| Bore diameter (d) | 40 mm |
| Outside diameter (D) | 72 mm |
| Width (B) | 15 mm |
| Contact angle | 60° |
Load ratings
| Basic dynamic load Ca | 52 kN |
|---|---|
| Limiting static axial load | 40 kN |
| Basic dynamic load Ca (2 rows) | 65 kN |
| Basic dynamic load Ca (3 rows) | 86.5 kN |
| Limiting static axial load (2 rows) | 104 kN |
| Limiting static axial load (3 rows) | 157 kN |
Speed, mass and lubrication
| Limiting speed (grease) | 4100 min-1 |
|---|---|
| Limiting speed (oil) | 5500 min-1 |
| Mass (approx.) | 0.275 kg |
| Recommended grease quantity | 3.6 g/brg |
Preload and axial rigidity
| Preload class | H |
|---|---|
| Preload (duplex DB/DF) | 2860 N |
| Axial rigidity (duplex DB/DF) | 1080 N/um |
| Starting torque, grease (duplex DB/DF) | 0.19 Nm |
Dimensions
Mounting envelope and abutment shoulders for layout, housing design and screw-end integration.
Bore (d)
40 mm
Outside diameter (D)
72 mm
Width (B)
15 mm
| Bore diameter (d) | 40 mm |
|---|---|
| Outside diameter (D) | 72 mm |
| Width (B) | 15 mm |
| Chamfer r min / r1 min | 1 / 0.6 mm |
| Abutment shoulder da min | 47 mm |
| Abutment shoulder Da max | 66 mm |
| Abutment shoulder Db max | 67 mm |
| Abutment shoulder db min | 47 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 40TAC72C. Parameters not shown require NSK manufacturer catalogue verification before design sign-off. Reference to NSK 40TAC72C supports engineering identification and quotation only.
Applications
Typical NSK TAC C ball screw support applications for NSK 40TAC72C.
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 40TAC72C.
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: 2860 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 40TAC72C?
NSK 40TAC72C 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 40TAC72C?
Catalogue dimensions for NSK 40TAC72C are 40 x 72 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 40TAC72C?
NSK 40TAC72C uses a 60° contact angle per the NSK Super Precision Bearings Catalogue for the TAC C series.
What is the limiting speed of NSK 40TAC72C?
Grease lubrication limiting speed for NSK 40TAC72C is 4100 min-1. Oil lubrication limiting speed: 5500 min-1.
What is the dynamic load rating of NSK 40TAC72C?
Catalogue basic dynamic load Ca for NSK 40TAC72C is 52 kN. Multi-row arrangement ratings are shown separately when tabulated.
What preload applies to NSK 40TAC72C in duplex mounting?
Catalogue duplex DB/DF preload for NSK 40TAC72C is 2860 N with axial rigidity 1080 N/um and starting torque 0.19 Nm. These are arrangement ratings, not single-bearing properties.
How do I order or identify NSK 40TAC72C?
Base designation NSK 40TAC72C 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 40TAC72C designation, screw diameter, lead, speed, axial load and application context for ball screw support bearing engineering quotation.