Gullco KBM-28 User Manual download pdf (Page 28)

CUTTER

The circular cutter on the Gullco KBM

-28 bevelling machine is made from special, high strength

and abrasion resistant tool steel and is designed to withstand the heavy stresses applied during

normal bevelling operations. All cutters are heat treated to provide maximum cutter life. The

specifically designed serrated cutting edge provides a firm grip on the material for both feeding and

cutting purposes.

Three (3) types of cutters are available for use with the KBM

-28. The table below shows the basic

features of each cutter. It is important to note that the properties of different materials will respond

differently to each other with respect to rotary shearing. Therefore the following is only intended as

a guideline. It is Gullco's recommendation that the best cutter for the project be found by trial and

experimentation.

AVAILABLE

CUTTERS

CUTTER PROPERTIES

FEEDABILITY BEVEL FINISH

IMPACT/HARD

SPOT

RESISTANCE

FEATURES

KBM

-28-X1C GOOD EXCELLENT GOOD

TOUGHER, MORE DURABLE,

MORE FORGIVING OF MINOR

IMPROPER SETUP/OPERATION

KBM

-28-X1H GOOD GOOD FAIR

HARDER, BETTER WEAR

RESISTANCE

KBM

-28-X1A EXCELLENT FAIR LOW

HARD, AGGRESSIVE CUTTER

PERFORMS WELL UNDER

PERFECT CONDITIONS, BUT

WILL FAIL IF NOT PROPERLY

SETUP/OPERATED

CUTTER LIFE

KBM

-28 cutters are subject to wear under normal working conditions and should be re-ground at

regular intervals, as per the procedure described later in this manual. The service life of the cutter,

before resurfacing or replacement is necessary, depends on a number of factors. The tougher the

plate material, the shorter the expected service life. It is also shortened by heavier cuts and greater

bevelling angles. However, the most important factor contributing to premature failure of the cutter

is misapplication of heavy stress to the cutter. How and why this occurs is described later in this

manual. Generally, it involves errors relative to the proper setup and use of the machine. A well

experienced operator will obtain a much longer service life from the cutter than indicated in the

“guide” below. An inexperienced operator may experience cutter failure after only a few feet

[meters] of cut. The following re-grinding schedule is provided as a guide:

- Mild Steel - Re-grind after bevelling 600 feet (182 meters)

- Stainless Steel - Re-grind after bevelling 300 feet (91 meters)

The most effective way to obtain maximum cutter life is:

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Gullco KBM-28 User Manual Page 28

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