1 I 11.,skl
MULTl�STARTTHREADS - 'SPINDLE GEAR' METHOD
When using this method, it must be noted that the top Changewheei rotates at
half
the Spindle
speed and the number of starts which can be cut is limited to figures which can be divided
(without _a remainder) into
half
the number of teeth on the top Changewheel.
THEN
Number of teeth to be
indexed between
=
each 'Thread-start'
E.G.·
No. Teeth of Top Changewheet
2 x No. of Starts Required
For a Two-Start Thread, index top Changewheel by:-
Or:-
No. Teeth on Top Changewheel
4
One whole quarter of a revolution.
22
1·:.···.
,•,.-.
'
i":-:\
u
Содержание M400
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