Performance Comparison Among Various Grinding Wheels; Selecting Grinding Wheel - Acer Supra 818PD Operation Manual

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5.9 PERFORMANCE COMPARISON AMONG VARIOUS
GRINDING WHEELS
Below table shows various grinding wheels performance.
Grinding Wheel Type (Abrasive and
production method)
CBN, DIA (resin, metal, electrolytic iron)
CBA
AG, CA (ceramic)
A, GC (ceramic porosity)

5.10 SELECTING GRINDING WHEEL

Selecting a grinding wheel for deep cutting with low speed feed:

ABRASIVE TYPE: Use high hardness and semi-brittle abrasive. For high alloy tool steel, it
is suggested to use the GC abrasive with high hardness that reduces wear and extends
service life.

GRAIN SIZE: Grain size can be finer by 2-grade when comparing with that of general
surface grinding.

BOND TYPE: Normally an extra soft bond type is suggested. For high-tensile strength
materials, a slightly hard bond type should be used.

STRUTURE: When selecting the abrasive percentage 32%~36%, for finer grain size, the
narrow part of continuous abrasive spacing can be compensated by coarse structure.
The selection of porous structure may ensure better dressing effect and increased
coolant effect.

Performance comparison among various grinding wheels

Symbol Description:
Abrasive
Abrasive
Wear
Spacing
Resistance
◎
◎
△
△
○
Excellent, Good,
◎
5-19
Coolant
Effect
◎
╳
◎ △
○
╳
◎ ◎
Poor, Bad
△
╳
818~2040 PD
Dressing
Effect
╳
△
○
◎