GRINDING WHEELS

GRINDING WHEELS

STANDARD SHAPES AND APPLICATIONS:

Grinding wheels are made in different shapes and sizes for grinding different jobs and for use in different machines. The size may differ in diameter, face width and bore dia.
The following are the standard shapes of grinding wheels.

Straight wheel: Type 1 (Fig 1)
This type of wheel is used on cylindrical, surface and center less grinders for grinding cylindrical and flat surfaces. Sometimes this type of wheel is used on rough grinders for off hand grinding

Cylinder: Type 2 (Fig 2)
This type of wheel is used on both horizontal and vertical spindle surface grinders for the surface grinding operations.

Tapered (both sides) Type 4 (Fig 3)
It is mainly used for rough grinding. The tapered sides reduce the chance of breaking.

Recessed both sides: Type 5(Fig 4)
It is used for cylindrical, surface and center less grinding. The recess provides clearance for the flange

Straight cup: Type 6 (Fig 5)
It is used on surface grinders and on tool and cl grinders to grind flat surfaces

Recessed both sides: Type 7 (Fig 6)
Used on cylindrical, surface and center less grinders. T recesses provide clearance for both flanges.

Flaring cup: Type 11 (Fig 7)
It is used on tool and cutter grinders mainly to sharps milling cutters and reamers.

Dish: Type 12 (Fig 8)     
Used on tool and cutter grinders to sharpen milling cutters with narrow slots like formed relieved cutters, hobs etc.

Saucer: Type 13 (Fig 9):
It is used for sharpening circular and hand saws.  It is also used for gashing milling cutter teeth.

Segmented wheels (Fig 10)
This type of wheels is formed by holding segments of abrasives using a metal holder. This is mainly used on a vertical spindle surface grinder.

Mounted wheels (Fig 11)
These are wheels with less than 50 mm dia. formed on a steel shank to various shapes. Mounted wheels are mainly used for die grinding, de burring and for finishing operations. Used on pneumatic or electric grinders.

Types of wheel faces
To do different operations different types of wheel faces are produced by manufacturers. (Fig 12)

Grinding wheel specification
A grinding wheel is specified by its marking, shape, outside dia. bore dia. thickness etc. (Fig 13a)

A recessed wheel is specified with all the above given particulars plus the dia. of the recess and the depth of the recess. (Fig 13b)