INITIAL CHOICE GRADE SELECTION GUIDE
APPLICATION & RECOMMENDATION

ALUMINUM
— heavy deburring: coarse resin
— stock removal: fiber

BRASS: resin

CEMENTED CARBIDE: green s/c (best) or black s/c

CENTER HOLE GRINDING: click here for recommended points

CENTER LAPPING (EX-CELL-O): click here for recommended points

CERAMICS (hard and brittle): green s/c

CHAMFERING EDGES: very hard blue-gray

DEBURRING: very hard blue-gray or very hard grayish-white

FORGING DIE GRINDING: hard blue-gray

INTERNAL FIXED FEED:
— highest RC materials: very soft grayish-white
— general purpose tool room: soft white
— softer RC materials: medium burnt-orange

JIG GRINDING: See this page

OFF HAND (PORTABLE) GRINDING (TOOLS AND DIES):
— general purpose stock removal: medium burnt-orange
— stock removal with light deburring: hard burnt-orange
— general deburring: hard to very hard blue-gray
— wear resistant steels: medium black s/c

POLISHING AND BLENDING: fiber

PROFILE GRINDING: click here for recommended points

ROUGH GRINDING:
— castings with incorporated burnt sand: very hard, coarse black s/c
— castings with no burnt sand: hard, coarse blue-gray
— interrupted cut or severe dressing: very hard, coarse blue-gray

STAINLESS STEEL (400 SERIES): resin

TROUBLESHOOTING
PROBLEM	LIKELY CAUSE
Wheel loading/glazing	Wheel too hard or fine Not enough grinding pressure* RPM too fast
Chatter marks on workpiece	Wheel needs to be trued Wheel overhang is too great Wheel is too hard Grinder/collet is overworn
Burning of workpiece	Wheel too hard or fine Not enough grinding pressure* Poor coolant flow (where used) Wrong bond type being used
Wheel life too short	Wrong grade Wheel, grinder or collet off balance

*never use excess grinding pressure!