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Manufacturer NSK / RHP
TAC C
Ball Screw Support
NSK 20TAC47C Ball Screw Support Bearing
Availability
Confirm at quotation
NSK / RHP · TAC C · Ball Screw Support · 20TAC47C
Bore (d)
20 mm
OD (D)
47 mm
Width (B)
15 mm
Contact angle
60°
Dynamic load Ca
13.9 kN
Static axial load
26.6 kN
Limiting speed
6900 min-1
- Manufacturer
- NSK / RHP
- Product Family
- NSK Ball Screw Support Bearings
- Series
- TAC C
- Designation
- 20TAC47C
- Configuration
- Ball Screw Support
NSK 20TAC47C is a TAC C ball screw support bearing (20 x 47 x 15 mm) for compact CNC feed axes, small precision positioning drives and light machine-tool ball screw supports. Catalogue dynamic load Ca: 13.9 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 20TAC47C 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 20 x 47 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
- 20TAC47C
- Configuration
- Ball Screw Support
Selection Guidance
Engineering checkpoints when specifying NSK 20TAC47C for a ball screw support application.
Engineering Specifications
NSK Super Precision Bearings Catalogue values for NSK 20TAC47C. Parameters not tabulated for this size are omitted rather than estimated.
Basic dimensions and identification
| NSK designation | 20TAC47C |
|---|---|
| Series | TAC C |
| Bore diameter (d) | 20 mm |
| Outside diameter (D) | 47 mm |
| Width (B) | 15 mm |
| Contact angle | 60° |
Load ratings
| Basic dynamic load Ca | 13.9 kN |
|---|---|
| Limiting static axial load | 26.6 kN |
Speed, mass and lubrication
| Limiting speed (grease) | 6900 min-1 |
|---|---|
| Mass (approx.) | 0.135 kg |
Preload and axial rigidity
| Preload class | H |
|---|---|
| Preload (duplex DB/DF) | 1450 N |
| Axial rigidity (duplex DB/DF) | 630 N/um |
| Starting torque, grease (duplex DB/DF) | 0.09 Nm |
Dimensions
Mounting envelope and abutment shoulders for layout, housing design and screw-end integration.
Bore (d)
20 mm
Outside diameter (D)
47 mm
Width (B)
15 mm
| Bore diameter (d) | 20 mm |
|---|---|
| Outside diameter (D) | 47 mm |
| Width (B) | 15 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 20TAC47C. Parameters not shown require NSK manufacturer catalogue verification before design sign-off. Reference to NSK 20TAC47C supports engineering identification and quotation only.
Applications
Typical NSK TAC C ball screw support applications for NSK 20TAC47C.
Ball screw support
Precision feed axis
CNC machine tools
Machine-tool feed drives
High axial rigidity
Compact ball screw supports
Configuration and Arrangement
Series-specific mounting, preload and arrangement context for NSK 20TAC47C.
Arrangement and mounting
Duplex DB/DF arrangement values from the NSK Super Precision Bearings Catalogue
Preload
Catalogue preload class H. Duplex DB/DF preload: 1450 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 20TAC47C?
NSK 20TAC47C 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 20TAC47C?
Catalogue dimensions for NSK 20TAC47C are 20 x 47 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 20TAC47C?
NSK 20TAC47C uses a 60° contact angle per the NSK Super Precision Bearings Catalogue for the TAC C series.
What is the limiting speed of NSK 20TAC47C?
Grease lubrication limiting speed for NSK 20TAC47C is 6900 min-1.
What is the dynamic load rating of NSK 20TAC47C?
Catalogue basic dynamic load Ca for NSK 20TAC47C is 13.9 kN. Multi-row arrangement ratings are shown separately when tabulated.
What preload applies to NSK 20TAC47C in duplex mounting?
Catalogue duplex DB/DF preload for NSK 20TAC47C is 1450 N with axial rigidity 630 N/um and starting torque 0.09 Nm. These are arrangement ratings, not single-bearing properties.
How do I order or identify NSK 20TAC47C?
Base designation NSK 20TAC47C 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 20TAC47C designation, screw diameter, lead, speed, axial load and application context for ball screw support bearing engineering quotation.