Hi all, I am new here.
I have just bought a Granville Senior Lathe,(some parts are similar to
a Myford ML7) probably as old as I am. Unfortunately the leadscrews on
the cross slide and topslide are not as desired.
The crossslide has got a really badly worn nut with about 4mm play
longitudinally.You can see the wear marks on the screw. The Topslide
has had the original leadscrew removed, the topslide reversed and a new
hole drilled and threaded to take what looks like a Whitworth thread.

So , my question is, where can I get replacements?
do I
a) send off to an engineering company to get new screws and nuts?
b) obtain Myford screws and nuts? Does anyone know if they will fit?

I I go for option a), is it worth going for a ball-screw system?

If I had a working lathe I could I suppose cut some new screws, but its
a bit like 'theres a hole in my bucket'

Does anyone have a copy of the manual for the lathe? I would be willing
to purchase one.

Assuming they are Acme thread, you can buy lengths of Acme threaded rod
for very reasonable prices. Cut to length, shape the ends as needed. As
for the crossfeed nuts, you can refresh the existing ones with Moglice.
- -


wrote:
Hi all, I am new here.
I have just bought a Granville Senior Lathe,(some parts are similar to
a Myford ML7) probably as old as I am. Unfortunately the leadscrews on
the cross slide and topslide are not as desired.
The crossslide has got a really badly worn nut with about 4mm play
longitudinally.You can see the wear marks on the screw. The Topslide
has had the original leadscrew removed, the topslide reversed and a new
hole drilled and threaded to take what looks like a Whitworth thread.

So , my question is, where can I get replacements?
do I
a) send off to an engineering company to get new screws and nuts?
b) obtain Myford screws and nuts? Does anyone know if they will fit?

I I go for option a), is it worth going for a ball-screw system?

If I had a working lathe I could I suppose cut some new screws, but its
a bit like 'theres a hole in my bucket'

Does anyone have a copy of the manual for the lathe? I would be willing
to purchase one.

On Tue, 28 Mar 2006 14:43:22 -0600, Rex B
wrote:

Assuming they are Acme thread, you can buy lengths of Acme threaded rod
for very reasonable prices. Cut to length, shape the ends as needed. As
for the crossfeed nuts, you can refresh the existing ones with Moglice.
- -



They'd need to be left hand threads wouldn't they?

Randy Replogle

Randy Replogle wrote:
On Tue, 28 Mar 2006 14:43:22 -0600, Rex B
wrote:

Assuming they are Acme thread, you can buy lengths of Acme threaded rod
for very reasonable prices. Cut to length, shape the ends as needed. As
for the crossfeed nuts, you can refresh the existing ones with Moglice.
- -



They'd need to be left hand threads wouldn't they?

Maybe. I can't recall without making twirly gestures with my fingers
and attracting undue attention in the office. But those are available also.

wrote in message
ups.com...
Hi all, I am new here.
I have just bought a Granville Senior Lathe,(some parts are similar to

Hi,
Go to www.lathes.co.uk they have details of the Senior.
Regards. Rotty

Its ok I won't care.
"Rex B" wrote in message
...
Randy Replogle wrote:
On Tue, 28 Mar 2006 14:43:22 -0600, Rex B
wrote:

Assuming they are Acme thread, you can buy lengths of Acme threaded rod
for very reasonable prices. Cut to length, shape the ends as needed. As
for the crossfeed nuts, you can refresh the existing ones with Moglice.
- -



They'd need to be left hand threads wouldn't they?

Maybe. I can't recall without making twirly gestures with my fingers and
attracting undue attention in the office. But those are available also.

According to :
Hi all, I am new here.

[ ... ]

So , my question is, where can I get replacements?
do I
a) send off to an engineering company to get new screws and nuts?
b) obtain Myford screws and nuts? Does anyone know if they will fit?

I I go for option a), is it worth going for a ball-screw system?

For a manual machine? That is really asking for trouble, as the
cutting forces can easily drive a ball-screw backwards.

On CNC machines (which can really benefit from ball screws),
there is always a stepper or servo motor resisting those forces, so you
should have no problems. But this does not sound like a CNC machine to
me.

Good Luck,
DoN.

--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---