Harrison Labs M400, Operation Manual

Page: 31 / 84

I'',
1'•.I
',.,..\
1-o.,
> .. \
1·1
\'.;:)
[1
J
[";
/,'.
!
1:-,j
hJ
I I tJ
Leadscrew Torque Limiting Device
This unit (mounted at the L. H. end of the lea dscrew l is provided to protect the gearbox and
end drive from damage in the event of a 'collision' during the thread cutting cycle and is carefully
set to a pre-determined slipping torque before the machine is dispatched from our works.
THE USER IS ADVISED NOT TO DISTURB THIS SETTING DURING NORMAL USE OF THE
MACHINE, BUT TO CONSl)LT OUR SERVICE DEPARTMENT IN THE UNLIKELY EVENT OF A
PROBLEM.
. .
Adjustment may be achieved however as follows:
1. Slacken the two M4socket grub screws on the R.H. O.D. of the unit.
2.
Turn the inner adjusting ring (clockwise to increase slipping torque) by means of the two
holes in the R.H .. end face of the unit.
3. Re-tighten the two M4 'Locking' screws, on the 0. D. of the shell.
An assessment of the slipping torque can be made by holding the apron handwheel in order to stop
the saddle movement whilst the screw cutting traverse is in operation.
29