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FAQ:

Abrasives



What is the recommended infeed per pass when dressing grinding wheels with diamond dressers?
Dress the minimum amount necessary to restore the geometry and cutting action of the grinding wheel per suggested infeed amount per pass:
  • Single Point Tools: .001 - .0015 maximum
  • Chisel Point, Blade Tools: .001 - .002 maximum
  • Multi Point, Cluster Tools: .001 - .005 maximum

EXCEPTION: Reduce infeed amounts by 25% when truing and dressing ceramic grinding wheels.

Remember that too heavy an infeed overheats the dressing tool, reducing tool life and wasting grinding wheel abrasive.

What is the proper tool speed (traverse rate) when dressing grinding wheels with diamond dressers?

TYPE OF TOOL SURFACE FINISH REQUIRED LEAD VALUE
SINGLE POINT, CHISEL, CONE AND MULTI-POINT FINE
MEDIUM
COARSE
.002 - .004
.005 - .007
.008 - .010
IMPREGNATED (MULTI-POINT), CLUSTER FINE
MEDIUM
COARSE
.006 - .012
.013 - .022
.023 - 030

Calculation Formula: RPM of Wheel X Lead Value = Traverse Rate (IPM) (Inches per minute)

EXAMPLE:

WHEEL: 20 X 8 X 12 64A60-K8V127
TOOL: Multi-Point BC63 (15° angle)
WHEEL SPEED: 1241 RPM
FINISH/STOCK REMOVAL: 32 RMS/Medium

Recommended Traverse Rate: 22.4 IPM (1241 (RPM) X .018 (Medium Lead Value)

A slow traverse rate will “close the wheel” resulting in lower RMS and lower metal removal rates. However, too slow a traverse rate can cause burn or chatter on parts.

A fast traverse rate will “open the wheel” resulting in higher RMS and higher metal removal rates.

How can I convert grinding wheel speed from RPM (revolution per minute) to SFPM (surface feet per minute)?
SFPM = .262 X Wheel Diameter in inches X RPM. EXAMPLE: 14” X 1-1/2” X 5” grinding wheel running @ 1750 RPM
SFPM = .262 X 14” (wheel diameter) X 1750 (RPM) or 6419 SFPM

Why does a grinding wheel begin to act softer as it gets smaller?
A grinding wheel will begin to lose surface footage speed as it loses size. For every 1,000 foot decrease in surface footage, the grinding wheel will act one grade softer.

EXAMPLE: A 20 X 8 X 12 centerless grinding wheel specification of 55A60-LVH running @ 1241 RPM starts out running @ 6502 SFPM (.262 X 20 (Wheel Diameter) X 1241 (RPM). The same wheel worn to "17" diameter is now running @ 5527 SFPM and acting like a K grade (one grade softer).

What is the accurate conversion of millimeters to inches?
Millimeters X 0.0393701 = inches.

Note: inches to millimeters conversion is: Inches ÷ 0.0393701 = millimeters.



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