Diamond dressing rolls are precision tools that require careful handling to assure proper and efficient functioning.
- The diamond roll and shaft must be free of any nicks, oxidation, dust, and/or grit prior to mounting.
- Use a fine grit oilstone on the sides of the roll to insure no metal protrusions are present.
- Use a fine grit oilstone on the shaft shoulder, at the Key Slot and on any areas indicating a scratch or metal protrusion.
- Spray the roll bore and sides, the shaft diameter and shoulder with some gage oil and wipe off with a lint-free shop towel.
- Mount the diamond roll on the shaft insuring that it does not cock.
- If resistance occurs, remove and re check for burrs (protrusions), restone the shaft end, wipe with towel and remount.
- If the shaft has a key, make sure the lead ends of the key is relieved to assist in alignment. Note: At times it is necessary to expand the I.D. and Key Slot width in order to aid in mounting. This can be accomplished by immersing the diamond roll in warm water (approximately 120°F)) for a few minutes which will temporarily expand the bore for ease of mounting.
- If spacers are used repeat step #1.
- Stone the face of the lock nut as in step #1. Tighten the locknut approximately to 3-4 inch pounds.
- Set up an .0001 indicator on the conbands and revolve assembly by hand to insure concentricity of the roll is within .0002 T.I.R. Should the indicator exceed .0002 loosen the locknut, rotate e the diamond roll on the shaft, and repeat steps d and e. Set the indicator on the side faces to insure .0002 or less T.I.R.
- For face mounted rolls (held on by screws) tighten only to 3-4 inch pounds and check as in step e.
- Wipe and brush the end of the shaft and roll faces to insure any grit is removed prior to disassembly. Trapped grit will score the shaft diameter and roll bore and make removal difficult.
- Rolls should slide off with a minimum amount of pressure.
- If resistance is encountered, secure the shaft rigidly and rotate the rolls by hand. Repeat step #1.
DRESSER DRIVE UNIT
- Drive unit must be precise and of sturdy construction.
- Drive unit must be rigidly mounted to machine and properly aligned with the grinding wheel spindle.
- Periodic checks should be incorporated to insure that the shaft is rotating concentric to the unit bearings to .0001 maximum runout. This should be done with the diamond rolls not mounted.
- A sound and vibration check should be made each time the diamond rolls are removed and remounted.
- Handle the diamond rolls carefully.
- Following mounting and removal instructions.
- Align grinding wheel within the diamond area width.
- Supply properly directed and sufficient volume of coolant.
- Check the drive unit periodically.
- Insure the grinding wheel is balanced.
- Alter the diamond roll bore or side faces.
- Use any type of hammer for mounting and/or removal.
- Force the diamond roll on the shaft.
- Dress without the drive unit running.
- Overtighten the locknut.
- Use spacers that are not parallel on ends.
- Over infeed the diamond roll.