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Clesco M-3 screw lock wheel adapter with dual flange

Clesco

Clesco M-3 Screw Lock-Type Wheel Adapter 540

SKU CH-3HAJ-3SYZG MPN M-3

Screw-lock wheel adapter with 1/4 and 3/8 inch unthreaded holes and a straight shank

  • TypeSanders
  • Screw-lock design secures abrasive wheels during high-speed sanding
  • Fits both 1/4 in and 3/8 in unthreaded wheel holes for versatile mounting
  • Straight 1/4 in shank fits standard rotary tool chucks and collets
  • Compact 2 1/8 in overall length improves control in tight work areas
  • 3/4 in outside flange diameter supports wheels up to 1/4 in thick

What This Adapter Does

The Clesco M-3 Screw Lock-Type Wheel Adapter connects abrasive wheels to power tools. It accepts unthreaded holes of 1/4 inch and 3/8 inch on the abrasive side and fits a 1/4 inch straight shank on the tool side. This suits technicians who need a quick-change mount for surface preparation work.

Connector Limits

The adapter handles a maximum wheel thickness of 1/4 inch and has an outside flange diameter of 3/4 inch. Overall length is 2 1/8 inches. Wheels thicker than the stated limit or with larger centre holes will not mount securely, and the straight shank requires a compatible chuck or collet on the tool.

Installation Notes

Slide the adapter into the tool chuck and tighten; the screw-lock mechanism then clamps the wheel by its centre hole. The most common issue is insufficient chuck grip on the 1/4 inch shank, which causes slippage under load. Ensure the wheel sits flat against the flange and the lock screw engages the unthreaded hole fully before starting the tool.

Highlights

  • Screw-lock design secures abrasive wheels during high-speed sanding
  • Fits both 1/4 in and 3/8 in unthreaded wheel holes for versatile mounting
  • Straight 1/4 in shank fits standard rotary tool chucks and collets
  • Compact 2 1/8 in overall length improves control in tight work areas
  • 3/4 in outside flange diameter supports wheels up to 1/4 in thick

Specifications

TypeSanders
BrandClesco
ModelM-3

Questions about this item

Which connector sizes does the M-3 adapter support?

The adapter fits abrasive wheels with 1/4 in and 3/8 in unthreaded holes and mounts to a tool with a 1/4 in straight shank.

How does the 2 1/8 in overall length affect reach in a die grinder?

The short 2 1/8 in length keeps the wheel close to the collet, reducing overhang and vibration during high-speed sanding.

What does the screw lock mechanism secure on this mandrel?

The screw lock clamps the wheel between the 3/4 in outside flange and the hub, holding wheels up to 1/4 in thick without a separate nut.

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