Skip Content


4" TS Disc Backup Pad, 1/4" Straight Shaft Back Mount, 12,000 Max. RPM, 1 EA

  • Item # 3WK74
  • My Part #
  • Mfr. Model # 63642543232
  • Catalog Page # 2372
  • UNSPSC # 31191505
Qk Chang Dsc BU Pad,4D,TS close

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.

CAD Downloads

Web Price $28.50 / each
Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Please sign in or register to access Quote

Want to Get Free Shipping?

Jump to:
  • Shipping Weight 0.23 lbs.
Country of Origin China Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Product Details

The NORTON disc back-up pad is designed for use on vertical shaft grinders to provide the required support and locking mechanism. Use this TS style pad with NORTON Speed-Lok® TS and MERIT Type 2, Standard Quick-Change™ discs. Medium-density can be used for a variety of grinding and finishing applications.

View More

Technical Specs

  • Item Disc Backup Pad
  • Disc Diameter 4"
  • Face Mounting Type TS
  • Back Mounting Type Straight Shaft
  • Back Mounting Size 1/4"
  • Max. RPM 12,000
  • Density Medium
  • Vacuum Hole Design Non-Vacuum
  • Body Material Rubber
How can we improve our Technical Specifications?

Compliance and Restrictions


Customer Reviews

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.