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