Collection: Grinder Spanners

Grinder Spanners are specialised hand tools used to install, tighten or remove the locking nuts (or flange nuts) that secure abrasive wheels, cutting discs and polishing pads on angle grinders and bench grinders.

Key Characteristics:

• Pin-Style or Slot-Style Ends:

  • Pin spanners have two hardened-steel pins spaced to match the holes in most angle-grinder flange nuts.

  • Hook or U-slot spanners engage the flats or slots on larger bench-grinder wheel nuts.

• Hardened Steel Construction: Built to resist wear against hardened nut surfaces and provide long service life.

• Compact Profile: Slim handles allow access in tight guard recesses without removing the guard.

• Ergonomic Grip: Many feature moulded or shaped handles for secure leverage when loosening stubborn nuts.

• Universal or Fixed Fit:

  • Fixed-spacing spanners suit a specific nut size (commonly 22 mm flange nuts on angle grinders).

  • Adjustable or multi-fit models include sliding pins or multiple hole patterns to cover various grinder brands.

Common Uses:

• Disc Changes: Quickly swap cutting, grinding or flap discs on angle grinders.

• Wheel Replacement: Remove and refit grinding wheels on bench grinders during wheel dressing or replacement.

• Maintenance & Safety Checks: Ensure nuts are correctly tightened to prevent wheel slippage or ejection under load.

• Accessory Swaps: Fit polishing pads, wire-brush wheels or sanding backing pads that use the same flange nut system.