Methods Of Cutting; General Instructions For Carrying Out A Cutting Operation; Cutting Straight Through; Two-Phase Turn-Around Cutting - GEISMAR STUMEC MTZ 350S Manual

4.4 Methods of cutting

4.4.1 General instructions for carrying
out a cutting operation
Here is a number of recommendations and
basic rules to ensure that the cutting operation
takes place under the best possible conditions
and guarantee the longest possible service life
for the equipment. In all cases, refer to the
methods of cutting in force on the worksite.
• Maximum engine power must be used
throughout the cutting operation, which
takes place in three phases :
➊ ➊ ➊ ➊ The cut-starting phase >> Cut the rail
beginning on the side of the railhead to
have the best possible angle of attack.
➋ ➋ ➋ ➋ The cutting phase >> During this phase,
the disc must be made to cut cleanly
using all the engine power available, but
without overloading it. A cut where the
disc has not entered the rail cleanly
enough, will lead to deterioration in the
disc's cutting power, to it overheating
and possibly to it disintegrating.
Wherever possible,
operation without stopping. ONLY re-
enter a cut that has already been started
if the guiding vice has not been moved
and the same machine and the same disc
are used.
4.4
IT IS EXTREMELY IMPORTANT
THAT THE MACHINE IS GIVEN A
PERMANENT BACK-AND-FORTH
MOVEMENT DURING CUTTING
Whatever type of cut is being carried out
(either a through-cut or a turn-around
cut), it must always be done in the two
following phases :
Ⓐ
Ⓑ
➌ ➌ ➌ ➌ The end of cutting phase >> Reduce the
pressure at the end of the cut so that, when
the disc passes through the rail, it does not
throw the operator off-balance or hit any
carry out the
foreign object.
Do not work with the forced
acceleration unit that should only be used
on starting up.
Before starting, always check that the
disc is large enough to cut through the
entire rail.
Cut the railhead
Cut the rail web and flange
A B
MTZ_Gb_00300_070525.doc

4.4.2 Cutting straight through

This type of cut consists of cutting through the
whole rail without turning the machine round.
A new disc must always be used for doing this
type of operation.

4.4.3 Two-phase turn-around cutting

➊ Working from the same side, first cut the
complete railhead and part of the flange.
➋ After slowing the engine down to idling
speed, and waiting for the disc to come to a
complete halt, stop the rail-cutting machine.
4.4