Visually inspect the grinding wheel
for cracks or any damage. Subject the wheel to the ring test
or do not use if there is any doubt regarding the soundness
of the wheel.
Compare the speed marked on the wheel
with the machine spindle speed. If the maximum RPM marked on
the wheel is lower than the spindle speed DO NOT mount the
Inspect the machine spindle and
flanges for any damage or wear. Make certain that the flange
screws are not too long for the tapped holes in the wheel
sleeve. Many times grit can fill the flange bolt holes and
the bolts will bottom out. Thoroughly clean spindle and
flanges of all worn blotter material and any dirt or foreign
Never force a wheel onto a spindle.
DO NOT use oil or grease on the spindle as this can cause
wheel breakage. If a lubricant is required, use a silicone
spray on the spindle to ease mounting.
Always use new blotters on collet and
flange surfaces when mounting a wheel.
Make sure the mount up arrow is at
the top of the wheel. In the case of a multiple wheel set
make sure the match lines stenciled on the grinding face are
Tighten the bolts on the flange by
hand to make sure the flange is properly seated.
Tighten all the bolts in an
alternating pattern to 15 ft-lbs. Repeat this tightening
sequence increasing the torque to 20 ft-lbs. min. or to the
machine builder’s recommendations. Higher horsepower
machines may require greater torque then recommended above.
Use 30-ft-lbs. for up to a 12” wide Centerless wheels. Use
40-ft-lbs on wheels over 12” wide. Use more than 20 ft-lbs.
only when approved by the machine builder.
Re-torque the flange bolts to
specification after eight hours of operation. Check every
eight hours thereafter until the torque remains constant.