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Black round disc pad hub with threaded centre hole, 4-1/2 in diameter

3M

3M 11823 Fibre Disc Pad Hub Quick Change 4-1/2 in

SKU CH-8QPB-KATAR

Quick-change fiber disc pad hub with 5/8"-11 threaded hole for 4-1/2 inch sanders, compatible with multiple 3M models

  • TypeSanders
  • Quick disc swaps with GL quick-change system
  • Secure fit via 5/8 in.-11 threaded connector
  • Works with 02618, 05620, 05621, 05622, 45194, 80514, 80515, 80516
  • 4-1/2 in diameter matches standard grinder spindles
  • Black round backup pad built for fiber discs

3M 11823 Quick Change Hub 4-1/2 Inch

The 3M 11823 is a round backup pad hub designed for 4-1/2 inch fibre discs with the Quick Change GL mounting system. It fits angle grinders and sanders that accept a 5/8-11 threaded hole connector. This hub is built for metal fabrication, weld blending and surface preparation tasks where fast disc changes are required.

Installation uses the 5/8-11 threaded hole

The hub threads directly onto the tool spindle with a 5/8-11 connection, so no separate flange nut is needed. Quick Change GL discs snap onto the hub face and release with a quarter turn. Common issues arise when the spindle thread is worn or when a disc is not fully seated, causing vibration or disc ejection under load.

Quick Change GL system limits compatibility

Only fibre discs equipped with the 3M Quick Change GL attachment can be used on this hub; hook-and-loop or adhesive-backed discs will not engage. The hub works with the manufacturer model numbers listed in the specifications and is not suited for tools with M14 or other spindle threads. Disc diameter must match the 4-1/2 inch hub face for safe operation.

Highlights

  • Quick disc swaps with GL quick-change system
  • Secure fit via 5/8 in.-11 threaded connector
  • Works with 02618, 05620, 05621, 05622, 45194, 80514, 80515, 80516
  • 4-1/2 in diameter matches standard grinder spindles
  • Black round backup pad built for fiber discs

Specifications

TypeSanders
Brand3M
Model11823

Questions about this item

How do I confirm the 5/8 in.-11 threaded hole engages correctly on my sander?

Screw the hub onto the spindle until the threads bottom out; the round 4-1/2 in. face should sit flush with no wobble when the tool runs.

What comes in the package and what must I supply?

The box contains only the black fibre disc pad hub; you must provide compatible 3M fibre discs and a sander accepting a 5/8 in.-11 threaded arbor.

Which 3M sander models does the 11823 hub fit?

It is compatible with manufacturer model numbers 02618, 05620, 05621, 05622, 45194, 80514, 80515 and 80516.

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