How to Mount a Bench Grinder

Written by jim franklin
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How to Mount a Bench Grinder
A bench grinder must be mounted before use. (grinder sparks image by Mateusz Papiernik from Fotolia.com)

A bench grinder, as the name implies, is a bench-mounted device used for the mechanical removal of material. Bench grinders typically come with two wheels. They can have two grinder stones or a grinding stone on one wheel and a wire brush on the other. After purchasing a bench grinder, it must be properly secured. Failure to do so may cause damage to the grinder and yourself. Mounting the grinder requires you to drill holes and insert screws or bolts to hold the grinder to the bench material.

Skill level:
Moderate

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Things you need

  • Level
  • 2 screws or bolts, 10-mm
  • 2 washers, 10-mm
  • Drill
  • 7.5-mm or 10-mm drill bit
  • 2 standard, adjustable or socket wrenches, 10-mm

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Instructions

  1. 1

    Place the grinder over the desired mounting spot on the bench. The bench should be strong enough to support the weight of the grinder. Check the surface with a level.

  2. 2

    Use a pencil to place two marks on the bench, through the mounting holes on the sides of the grinder.

  3. 3

    Remove the grinder.

  4. 4

    Drill two pilot holes into the mounting screw marks. Use a drill and a 7.5-mm drill bit. If you are bolting the grinder to the bench, use a 10-mm drill bit and drill holes completely through the bench material.

  5. 5

    Place the grinder on the bench. Line up the mounting holes in the sides of the grinder with the holes you made.

  6. 6

    Insert two 10-mm screws or bolts into the holes of the grinder and the holes in the bench. The screws need to be long enough to go at least 1 inch into the bench material. The bolts need to be long enough to go through the bench material, with enough room on the bottom for attaching the washers and nuts.

  7. 7

    Attach the grinder to the bench. Use the drill to drive the screws into the bench until tight. For bolting the grinder, push the bolts through to the bottom of the bench. Place the washers over the bolt threads. Attach the nuts on the ends and tighten by hand. Hold the nuts in place with one hand using a 10-mm standard, adjustable or socket wrench. Tighten the bolt heads with your other hand using a 10-mm standard, adjustable or socket wrench.

  8. 8

    Wiggle the sides of the grinder to check for any movement. The grinder should be secure to the bench.

Tips and warnings

  • If you have trouble drilling the screws into the pilot hole, the bit may need to be increased to a larger size such as 8-mm.

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