Failure During Cutting; Wheel Breakage; Discoloration Of The Specimen; Excessive Wear On The Wheel - Struers Discotom-2 Mode D'emploi

Failure During Cutting

Wheel breakage

Discoloration of the specimen

Excessive wear on the wheel

Undue burring

10
Discotom-2
Instruction Manual
Wheel breakage is usually the result of one or more of the following
conditions:

Use of unsuitable cut-off wheels designed for a rotational speed
of less than 3450 rpm (45 m/s).

Improper mounting of the wheel.

Improper clamping of the object. Only one of the quick-clamping
devices should be tightened, unless the object is completely flat.

Rough handling of the cut-off wheel during mounting or cutting.

Machine in bad repair.

Irregular coolant distribution. The cooling system should be
cleaned frequently. The sieve in the drain pan should be cleaned
whenever it is covered by chips.

Excessive feed speed.

Wheel too hard.

The wheel hardness was inappropriate for the hardness or
dimensions of the specimen, causing the motor to become
overloaded and the speed to fall below the permissible minimum.

Insufficient wheel pressure. If the wheel is not held against the
specimen with sufficient pressure, it will drag instead of bite,
which leads to overheating.

Inadequate cooling (cf. above).

The wheel is pressed too hard against the specimen.

Inadequate cooling (cf. above)

The wheel is too soft for the task.

Machine vibrations (worn bearings).

Wheel too coarse

Wheel too hard

Too much pressure on the specimen towards the end of the
operation. Where possible, the specimen should be fastened and
supported on both sides of the cut.