Grinding Blackalloy™ "525"™ Spitfire Tools

Blackalloy™ tool compound "525"™ requires a grinding technique that is not difficult. Several easy precautions are necessary to prevent cracking and checking.

  • Select the proper grinding wheel. The chart below shows our recommendations for grinding wheel selection.
  • Operate the wheel in the recommended speed range. Use our simple cross reference chart to translate your wheel/motor RPM combination to surface speed.
  • Avoid local overheating by traversing the work continually with respect to the wheel.
  • Use either a generous coolant supply or none at all. Cutoff wheels must be run dry.
  • Dress the wheel frequently to keep it free cutting.
  • Don't quench the tool after grinding.
  • Don't use excessively hard wheels. Common aluminum oxide wheels are more than suitable.
  • Don't use too heavy pressure.


Recommended Grinding Wheel Selection @ 3800-4200 SFPM

Method

Abrasive

Grain Size

Grade

Structure

Hand Roughing

Aluminum Oxide

60

K

6

Hand Finishing

Aluminum Oxide

60

I

6

Machine Roughing

Aluminum Oxide

60

I

8

Machine Finishing

Aluminum Oxide

60

I

6

Machine Forming

Aluminum Oxide

100

I

6

Note: Tools must be completely flushed with coolant or used dry.
Intermittent or insufficient coolant can cause tool failure.


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Blackalloy Company of America • 1836 Lonestar Street • Unit 3 • Conway, SC 29526

Tel: (843) 347-3390 • Fax: (843) 347-3391

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