This page has been edited 20 times. The last was made by - gheuer gheuer on May 19, 2015 11:32 am GMT


11.3 Slow Speed Water Wheel

Considerations

  • Pre-Operation Checklist is a prerequisite for ANY operation.
  • This standard refers to a bench grinder with a wheel which turns at between 70-700 rpm, with water cooling the edge as heat is generated.
  • This standard is intended to cover both horizontal and vertical wheels.
  • The wheel is properly guarded.
  • Appropriate stance is utilized for optimum balance and part control.
  • Operator clears machine and cleans work area after use.
  • Required OSHA approved personal protective equipment is worn.
  • Lock-out/Tag-out procedure is in place and followed.
  • Operations are completed in a timely manner.

Pre-Operation Checklist

Level 1

  • Verifies wheel is flat.
  • Ensures wheel has adequate supply of clean water.
  • Verifies that the space between the tool rest and the edge of the wheel does not exceed 1/8".

Level 2

  • Installs guide at desired angle.
  • Ensures wheel and tool rest adjustments are checked and tightened securely.
  • Verifies wheel is sound, without cracks or chips and properly dressed.
  • Meets Level 1 performance standard.


11.3.1 - Sharpening Straight Blade

Level 1

Given a properly set-up machine, wheel, and tool rest, produce a true edge and bevel, ready for honing, on a straight square blade such as a hand chisel or blade for a hand plane.
Performance Standard -
  • Edge is sharp enough to catch when sliding across the surface of a finger nail.
  • Edge of blade is straight and square to adjacent edges of tool ±0.015".
  • Ground surface of tool is smooth and shows uniform marks from grinding wheel.
  • There is no burning or discoloration.

Level 2

Given a wheel, tool rest and properly set-up machine, produce a true edge and bevel, ready for honing, on a straight square blade such as a hand chisel or blade for a hand plane.
Performance Standard -
  • Sets tool rest at the proper distance from wheel for specified angle.
  • Demonstrates ability to match existing angle by adjusting tool rest so contact point is in the middle of the bevel.
  • Demonstrates ability to blunt an edge at 90º and grind a new angle.
  • Demonstrates ability to install/change wheels.
  • Angle reading is accurate to within 0.5º.
  • Meets Level 1 performance standard.