ManufacturerNSK / RHP
NSK 40TAC72C Ball Screw Support Bearing
Engineering product page for NSK 40TAC72C -- TAC C series, catalogue specifications and quotation support.
TAC CPreload H
Product and series description
NSK 40TAC72C is a TAC C high-rigidity angular contact thrust ball bearing. Customers search this exact designation for dimensions, load ratings, replacement and supplier quotation intent.
Duplex DB/DF preload, axial rigidity and starting torque values are catalogue ratings for the stated arrangement, not for a single unmounted bearing.
Application role
Ball screw support bearings at the fixed or floating end of a precision screw drive carry axial loads, define system stiffness and accommodate thermal elongation. This designation must be evaluated with screw diameter, speed, nut preload and lubrication at both screw ends.
Key specifications
Values from the NSK Super Precision Bearings Catalogue. Parameters not tabulated for this designation are stated explicitly.
| Parameter | Value |
|---|---|
| NSK designation | 40TAC72C |
| Series | TAC C |
| Bore diameter (d) | 40 mm |
| Outside diameter (D) | 72 mm |
| Width (B) | 15 mm |
| Contact angle | 60° |
| Basic dynamic load Ca (1-row) | 52 kN |
| Limiting static axial load (1-row) | 40 kN |
| 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 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 |
| 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 |
| 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 |
Ordering and identification
NSK ordering codes combine bore, TAC series, seal, arrangement, preload and accuracy suffixes. Example: 30 TAC 62 C DDG SU H PN7C. Do not assume a complete ordering designation from the base model code alone.
Send existing part marking, required seal type, arrangement (fixed/floating), preload class and accuracy requirement for engineering identification.
Selection and quotation guidance
For quotation, provide NSK designation, screw diameter, lead, speed, axial load, duty cycle, arrangement and environment. Golden Bearing Company supports engineering-led identification and quotation without publishing price, stock or availability claims on this page.
Evidence and commercial boundary
Engineering values on this page are taken from the NSK Super Precision Bearings Catalogue for NSK 40TAC72C.
Reference to NSK 40TAC72C does not imply Golden Bearing Company distributes, stocks, authorises or represents NSK unless separately confirmed. No price, stock, availability or lead-time claims are made.
Product questions
NSK 40TAC72C is a TAC C ball screw support bearing used in high-rigidity angular contact thrust ball bearing. Exact suffix configurations such as seal, arrangement and accuracy class must be confirmed against NSK manufacturer ordering data.
Catalogue extract dimensions: bore 40 mm, OD 72 mm, width 15 mm. See the specification table on this page for the full parameter list.
60° contact angle per NSK Super Precision Bearings Catalogue for this series.
Catalogue grease lubrication limiting speed: 4100 min-1. Oil lubrication limiting speed: 5500 min-1.
Catalogue duplex DB/DF preload: 2860 N with axial rigidity 1080 N/um and starting torque 0.19 Nm. These are arrangement ratings for duplex DB/DF mounting, not properties of a single unmounted bearing.
Base family designation: 40TAC72C. Complete ordering codes add seal, arrangement, preload and accuracy suffixes (for example SU H PN7C on TAC C sizes). Send existing marking or application duty for identification support.
NSK application contexts include CNC machine tool feed drives, precision positioning axes, and heavy-load servo drives depending on series (TAC C rigidity vs TAC 03 load vs BSBD cartridge mounting).
Request an Engineering Quote
Share shaft bore, speed, torque duty and ordering designation for NSK 40TAC72C. Send NSK designation, screw duty and application context for ball screw support bearing engineering quotation.