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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

  • Product 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.

How it compares

Measured against everything we stock in Sanders, Rotary & Demolition Tools, at today’s prices. Recalculated every night.

Price $2.99
Cheaper than about 93% of the 477 comparable items (median $21.99).

Specifications

Product
Brand nameClesco
Model nameM-3
Product typeSanders

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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