 |

Wheel Care & Usage
Diamond and CBN Wheel Care and Usage
- For achieving the best results using Newman Diamond and CBN products, the following steps -mounting, truing, dressing - should be followed.
Mounting - putting wheel on machine spindle
- Examine wheel flanges and spindle carefully.
- Inspect machine spindle for excessive runout.
- Mount wheel between hand-tightened flanges.
- Using a dial indicator, tap the wheel lightly with a rubber or wooden block to minimize runout to less than .0010".
- Tighten flange securely and recheck with indicator.
- Allow a newly mounted wheel to operate for one full minute before grinding.
Truing - making wheel round and concentric with the spindle axis
- Prior to truing the wheel, run a wax crayon over the wheel face.
- Any crayon left on wheel face after truing will reveal untrued areas.
- Newman Brake Controlled Truing Devices are most commonly used to true diamond and CBN straight, cup and cylinder wheels.
- Always use Brake Controlled Truing Device dry.
- Bring the Diamond/CBN wheel and the truing wheel together until they almost touch.
- Make sure the truing wheel is spinning at time of contact.
- Traverse the wheel back and forth at 30 to 60 inches per minute.
- Downfeed .0005" to .001" at the end of each traverse.
- At the end of truing, the Diamond/CBN wheel should be smooth and in truth.
Dressing - opening the face of a trued wheel
- Dressing sticks should be one or two grit sizes finer than the Diamond/CBN wheel.
Trouble Shooting Guide
|
Problem
|
Possible Cause
|
Suggested Correction
|
Problem
|
Possible Cause
|
Suggested Correction
|
Burning (excessive heat)
|
Wheel loaded or glazed
|
Dress wheel with a dressing stick
|
Poor finish (con't)
|
Poor coolant flow or location interface
|
Apply heavy flood so it reaches wheel/workpiece
|
|
Excessive feed rate
|
Reduce infeed of wheel or workpiece
|
Chatter
|
Wheel out of truth
|
True wheel, ensure it is not slipping on mount
|
|
Wheel too durable
|
Use freer cutting specification or slow down wheel speed
|
|
|
|
|
Poor placement of coolant
|
Apply coolant directly to wheel/workpiece interface
|
|
|
|
Poor Finish
|
Excessive dressing
|
Use lighter dressing pressure; stop dressing as soon as wheel starts to conusme stick rapidly
|
Short wheel life
|
Incorrect coolant flow
|
Apply coolnat to flood wheel/workpiece
|
|
Grit size
|
Select finer grit sizes
|
|
Low Wheel speed
|
Increase wheel speed
|
|
|
|
|
Wheel too soft or too hard
|
Change grit or grade, use higher concentration
|
Please email newmanwheel@newmanwheel.com with any questions
Designed by Heck Consulting © 1997
|