I have been looking at this lathe, it has a 6 station turret and 4
slides. How does it work for setting the feed on the turret when
tapping and using a diehead.
The rest I can figure out with using the cams, plus what should I look
for and what questions to ask.
Ron

On 2010-05-06, Ron from Oz wrote:
I have been looking at this lathe, it has a 6 station turret and 4
slides. How does it work for setting the feed on the turret when
tapping and using a diehead.

Hmm ... I'm not familiar with this lathe (it sounds like an
automatic screw machine) but with my lathe (bed turret replaces the
tailstock, and has no power feed) I do threading with Geometric die
heads, which cut to full depth with hand feed, and pretty much control
the feed once they start, and once it reaches full length of thread (the
stop on the turret stops the advance) the thread feeds the head just a
little farther and trips the dog which allows the four chasers (like the
jaws in a 4-jaw chuck) to spring outwards and the die head is withdrawn
over the still rotating workpiece.

For large diameter threaded holes (e.g. on camera extension
tubes) there are collapsing taps by Geometric which behave similarly
except inside out.

For tapping normal sized holes, the tap is in a releasing tap
holder which pulls free of a dog and allows the tap to rotate with the
workpiece until you can stop and reverse the spindle to back out of the
tapped hole.

The rest I can figure out with using the cams, plus what should I look
for and what questions to ask.

Sounds like you have an intersting toy.

Good Luck,
DoN.

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On 7 May 2010 06:18:40 GMT, "DoN. Nichols" wrote:

On 2010-05-06, Ron from Oz wrote:
I have been looking at this lathe, it has a 6 station turret and 4
slides. How does it work for setting the feed on the turret when
tapping and using a diehead.

Hmm ... I'm not familiar with this lathe (it sounds like an
automatic screw machine) but with my lathe (bed turret replaces the
tailstock, and has no power feed) I do threading with Geometric die
heads, which cut to full depth with hand feed, and pretty much control
the feed once they start, and once it reaches full length of thread (the
stop on the turret stops the advance) the thread feeds the head just a
little farther and trips the dog which allows the four chasers (like the
jaws in a 4-jaw chuck) to spring outwards and the die head is withdrawn
over the still rotating workpiece.

For large diameter threaded holes (e.g. on camera extension
tubes) there are collapsing taps by Geometric which behave similarly
except inside out.

For tapping normal sized holes, the tap is in a releasing tap
holder which pulls free of a dog and allows the tap to rotate with the
workpiece until you can stop and reverse the spindle to back out of the
tapped hole.

The rest I can figure out with using the cams, plus what should I look
for and what questions to ask.

Sounds like you have an intersting toy.

Good Luck,
DoN.

Ive got (3) Bechler A10s and (1) Bechler AR10 swiss screw machines. All
running nicely, very very good condition and available for very very
little money.

$1000 gets all 4 machines plus spares, tooling, bar feeders, manuals and
whatnot.

http://picasaweb.google.com/gunneras...79652064241154
http://picasaweb.google.com/gunnerasch/ForSale#

Located in So. California

And I really really need these gone.

Gunner

--


"First Law of Leftist Debate
The more you present a leftist with factual evidence
that is counter to his preconceived world view and the
more difficult it becomes for him to refute it without
losing face the chance of him calling you a racist, bigot,
homophobe approaches infinity.

This is despite the thread you are in having not mentioned
race or sexual preference in any way that is relevant to
the subject." Grey Ghost

Thanks for the replys.
Ron from OZ