Re: [CAD_CAM_EDM_DRO] Re: turret tool post for lathe

Hi Les,

The spindle direction is forwards when the chuck-key you left in the chuck
hits you in the head. If the key bounces off your wedding tackle the machine
is in reverse. Tool mount in the rear tool post are upside down so that the
cutting forces are in the same direction as those mounted the the front tool
post. A parting tool will not then dig in and a boring tool will turn
parallel to the lathe ways instead of turning trumpet, this is assuming the
lathe turns parallel when tooling is used in the front tool post. Unless the
lathe has a cam-lock chuck it should never be used to cut in the reverse
direction anyway as the chuck will unscrew. In twenty years of machining, I
can count on one hand the number of times I've run a lathe in reverse.

Regards,

Terry

> Good point, I never thought of that! My turret uses a worm and wheel so it
> should be fairly resistant to being back driven but it is worth keeping in
> mind.
>
> BTW on a machine with a rear turret, which spindle direction is

'forwards'.

> Clockwise or anticlockwise(looking at the chuck)?
>
> Thanks,
> Les