Leadscrew suppliers

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Leadscrew suppliers

This topic has 39 replies, 20 voices, and was last updated 16 July 2020 at 16:17 by Michael Gilligan.

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8 July 2020 at 01:09 #484527
Pete.
Participant
@pete-2
I've been restoring a small benchtop mill from the 1940's, there is quite a lot of backlash in the x and y, I'm going to fit new leadscrews and nuts.

The current screw is 5/8, so a trapezoidal 16mm will be a suitable replacement.

I can only find one supplier for a T16 leadscrew and nuts, and it's a 4mm lead, ideally I'd prefer a 3mm lead, does anyone know any suppliers?

The one I found is called 'accu' and they only seem to have a 4mm lead.

Any help much appreciated thanks.
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8 July 2020 at 01:09 #13971
Pete.
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@pete-2
8 July 2020 at 06:10 #484529
Thor 🇳🇴
Participant
@thor
Hi Pete,

T16 with a 3mm pitch might not be easy to find, usually 3mm pitch go to T14. I found one in the US, this supplier lists T16 with 3mm pitch, may be expensive to get delivered to Europe though.

Thor
8 July 2020 at 08:09 #484533
not done it yet
Participant
@notdoneityet
Bornemann comes up on my ‘puter as a bespoke supplier. Would not be cheap, but likely no worse than importing from the US?

HPC Gears says ‘specials can be manufactured to order’.
8 July 2020 at 09:17 #484542
John C
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@johnc47954
**LINK**
8 July 2020 at 09:27 #484543
Mike Woods 1
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@mikewoods1
I wonder if any of the Warco, Chester, Sieg, Amadeal or Axminster lathes or milling machines use this T16 x 3mm format. If so, the perhaps you could buy a spare part from one of the suppliers and modify to suit? Both my lathe and mill are in storage at the moment, otherwise I would measure them, but I am sure that the lathe is T16 x 3mm x 500mm. Mine is a Chester 920, so has a keyway over its entire length for a feed worm gear, other lathes which use half nuts for both feed and threading would not have that. Also, what is used on the remanufactured Myfords? Maybe others with ready access to their machines could offer some advice. Just a thought.

Edited By Mike Woods 1 on 08/07/2020 09:30:22
8 July 2020 at 09:27 #484544
John Haine
Participant
@johnhaine32865
Was the original 1/8" pitch? 3 mm is an awkward number for dials. 2.5 mm would surely be better?

Why 16 mm? You can get 3 mm in smaller size.

**LINK**
8 July 2020 at 09:29 #484545
john fletcher 1
Participant
@johnfletcher1
If you do a search for lead screws , I think you might find some thing like Humber Engineering or Hull Engineering, both ring a bell but can't be sure. Some time ago some here ,spoke of an engineering company in the Hull area who stock lead screws and he was a satisfied customer. John
8 July 2020 at 09:32 #484547
Chris Evans 6
Participant
@chrisevans6
Not sure of your pitch but I have bought from Automotion Components in the past.
8 July 2020 at 09:59 #484555
William Chitham
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@williamchitham75949
Posted by John Haine on 08/07/2020 09:27:50:

Was the original 1/8" pitch? 3 mm is an awkward number for dials. 2.5 mm would surely be better?

For some reason 2.5mm pitch screws are vanishingly rare which is a shame since that is what I need for a Boxford crosslide.

W.
8 July 2020 at 10:26 #484560
Sandgrounder
Participant
@sandgrounder
Posted by john fletcher 1 on 08/07/2020 09:29:21:

If you do a search for lead screws , I think you might find some thing like Humber Engineering or Hull Engineering, both ring a bell but can't be sure. Some time ago some here ,spoke of an engineering company in the Hull area who stock lead screws and he was a satisfied customer. John

There is a firm in Hull called Kingdton Engineering who make leadscrews

http://www.kingston-engineering.co.uk/products.php

John
8 July 2020 at 11:40 #484572
Niels Abildgaard
Participant
@nielsabildgaard33719
These people also has nuts (Mutter) and trapez 16 * 3.

Tr 16 * 3 and nuts
8 July 2020 at 13:09 #484581
old mart
Participant
@oldmart
If you are replacing both leadscrews, check to see if they are right and lefthanded. If they are and you want to save money by buying one length of leadscrew, you will have to decide which axis will turn in the opposite direction to before choosing. I fitted a 3mm pitch leadscrew to the Smart & Brown model A at the museum to replace the worn out 8tpi one, and made a dial with 118 divisions on it instead of the original 125. This was because the rest of the lathe was imperial. With both leadscrews on your mill metric, you might just as well go with 120 divisoins, for 0.025mm steps.

If you end up with 4mm pitch screws, then dials with 160 divisions would give the 0.025mm steps.

Edited By old mart on 08/07/2020 13:15:16
9 July 2020 at 03:02 #484667
Pete.
Participant
@pete-2
Thanks for all the suggestions, I will take a look at all of them when I have 5 minutes.

The screw on there is a 5/8" 10tpi that I believe is 1/8" lead, replacing it with a 4mm lead isn't the end of the world, it just allowed for slightly smaller divisions with a 3mm.

The company I originally found that does a Tr16 x 4mm works out about £50 – £60 which is pretty reasonable.

I'll have a look at some of the suggestions and see what the prices are and leave a note here for anyone else who might have a similar problem.

Thanks to all
9 July 2020 at 07:27 #484673
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Pete. on 09/07/2020 03:02:16:

[…]

The screw on there is a 5/8" 10tpi that I believe is 1/8" lead …

.

Sorry, Pete … I don’t understand that statement ^^^

MichaelG.
9 July 2020 at 07:40 #484678
JasonB
Moderator
@jasonb
Indeed, 10tpi will be 0.100" lead which allows for the handwheel to have a handy 100 divisions.

Personally I would avoid half mm pitches or uneven ones and go for 2 or 4mm pitch as it makes it easier to count the number of turns. 2mm should do on a small benchtop machine and allows a handwheel to have quite small divisions and is a lot closer to your existing 2.54mm pitch than 4mm. Not such an issue if fitting a DRO.

4mm pitch would also need a bit more effort to turn, lack feel and be a bit harder to set to an exact position as you will have less rotation for a given amount of movement.

Edited By JasonB on 09/07/2020 07:49:08
9 July 2020 at 08:28 #484685
Andy Carlson
Participant
@andycarlson18141
Imperial ACME screws can be had, certainly from HPC Gears in Chesterfield and Kingston Engineering in Hull so the first question is whether you actually want to change it to a metric pitch.

Also check whether each screw is right or left handed before investigating prices and availability.
9 July 2020 at 18:46 #484794
old mart
Participant
@oldmart
Having minimum backlash is a huge advantage, and while the mill is in bits, it would be worth seeing if there is room to incorporate backlash adjustment. Also, if fitting DRO's is a likelyhood, then the actual pitch wont matter as you will never be looking at mechanical scales.
9 July 2020 at 20:11 #484807
colin vercoe
Participant
@colinvercoe57719
Halifax Rack and Screw company, if they are still in operation.
10 July 2020 at 01:04 #484838
Pete.
Participant
@pete-2
Posted by Michael Gilligan on 09/07/2020 07:27:53:

Posted by Pete. on 09/07/2020 03:02:16:

[…]

The screw on there is a 5/8" 10tpi that I believe is 1/8" lead …

.

Sorry, Pete … I don’t understand that statement ^^^

MichaelG.

Sorry, I'd had long day when I wrote that, I'm not surprised you didn't understand it, I don't.

It's a 5/8" leadscrew, 10 turns of the dial moves the table 1" which would make the lead closer to 2.5mm?
10 July 2020 at 01:08 #484839
Pete.
Participant
@pete-2
Posted by JasonB on 09/07/2020 07:40:30:

Indeed, 10tpi will be 0.100" lead which allows for the handwheel to have a handy 100 divisions.

Personally I would avoid half mm pitches or uneven ones and go for 2 or 4mm pitch as it makes it easier to count the number of turns. 2mm should do on a small benchtop machine and allows a handwheel to have quite small divisions and is a lot closer to your existing 2.54mm pitch than 4mm. Not such an issue if fitting a DRO.

4mm pitch would also need a bit more effort to turn, lack feel and be a bit harder to set to an exact position as you will have less rotation for a given amount of movement.

Edited By JasonB on 09/07/2020 07:49:08

You're right, after some consideration, 2mm lead would be much better.
10 July 2020 at 01:18 #484840
Pete.
Participant
@pete-2
Posted by old mart on 09/07/2020 18:46:50:

Having minimum backlash is a huge advantage, and while the mill is in bits, it would be worth seeing if there is room to incorporate backlash adjustment. Also, if fitting DRO's is a likelyhood, then the actual pitch wont matter as you will never be looking at mechanical scales.

I won't be fitting a DRO, I don't want to alter the machine too much, but as I work in metric, putting a metric leadscrew in would be a good compromise.

I will likely incorporate something to adjust backlash, I plan on using it for small jobs as I do have a bigger mill, but adjustment on the backlash would make it nicer to use.,
10 July 2020 at 08:06 #484853
JasonB
Moderator
@jasonb
Posted by Mike Woods 1 on 08/07/2020 09:27:06:

I wonder if any of the Warco, Chester, Sieg, Amadeal or Axminster lathes or milling machines use this T16 x 3mm format.

TR16 x 2 on some of the Sieg mills, what length of thread do you need?
10 July 2020 at 08:16 #484854
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Pete. on 10/07/2020 01:04:13:

Posted by Michael Gilligan on 09/07/2020 07:27:53:
[…]

Sorry, I'd had long day when I wrote that, I'm not surprised you didn't understand it, I don't.

[…]

.

It happens to us all, Pete

… go for the 2mm pitch.

MichaelG.
10 July 2020 at 10:50 #484872
Kiwi Bloke
Participant
@kiwibloke62605
Another supplier… Halifax Rack and Screw.

Edited By Kiwi Bloke on 10/07/2020 10:50:59
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