Struers Discotom-2, Инструкция по эксплуатации

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Discotom-2
Instruction Manual
10
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.
Failure During Cutting
Wheel breakage
Discoloration of the specimen
Excessive wear on the wheel
Undue burring