571 Operation/Maintenance Instructions Page 14 of 19
8. Do not traverse the table when the chisel is in contact with the bottom of the mortise, as this
could damage the auger and strain the mortise chisel.
9. In the interests of ease, for an extended life of mortise chisels, and for speedy working, it is
preferable to use sharp but shallow strokes on the handle, i.e. about 25mm deep for softwoods,
and 12mm deep for hardwoods. This applies particularly to wet or abrasive timber.
Faults Diagnosis
Chisel is not square to fence
Square the chisel to the fence
Auger too far in advance of
the chisel
Chisel end blued and cracked
auger rubbing against the
auger edge, causing over
heating
Reposition the auger, regrind,
or replace the chisel
Chisel becomes hot near
centre
Straighten or replace the
auger
Chippings build up inside
chisel
Bad clearance. The auger
spiral does not extend far
enough, or resinous timber is
gumming up the inside of the
chisel
Remove the auger and clean
with paraffin periodically
Limitations of Use and Safe Working Practices
Training and instruction is a central requirement of the Provision of Work Equipment
Regulations 1998 (PUWER). No morticing machine can be operated by any person under the age
of 18 without them having first completed an approved course of training. The regulation does
realise that young persons may need to operate one of these machines as part of a course, and
such use is permitted provided that it is carried out under the supervision of a person who has
thorough knowledge and experience of the machine and of its safeguarding requirements.
It is essential that all operators of morticing machines are adequately trained in the use,
adjustment and operation of the machine, this covers in particular:
The dangers associated with the operation of the machine;
The principles of machine operation, correct use and adjustment of the controls;
The safe handling of the workpiece when cutting;
The position of the hands relative to the cutters and the safe stacking of the workpiece
before and after cutting.
Under no circumstances should anyone operate the machine while under the influence of
drugs, alcohol or any medication which may render them drowsy.
Persons who install this machine for use at work have a duty under the Health and Safety at
Work Act 1974 to ensure, as far as is reasonably practicable, that nothing about the way in
which it is installed makes it unsafe or a risk to health at any time during setting, use, cleaning,
and maintenance. This includes such aspects as correct assembly, electrical installation,
construction of enclosures, and the fitting of guards and ventilation equipment. When installing
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