Author Topic: Raglan mill help  (Read 841 times)

Offline scc

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Raglan mill help
« on: February 09, 2019, 06:14:33 PM »







Hi All,    My Raglan mill is in need of new leadscrews/nuts on it's x/y axis. I got away with it on the big Burrell but  cannot cope with the smaller stuff...locking gibs and adding/subtracting numbers to dials is not on :ShakeHead:
I am unsure about making new myself (the long one is to long for my lathe anyway. Thread is square 0.625 inch dia X 8 tpi, one of them is left hand. Are parts available?
Any ideas?







raglan

Online steamer

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Re: Raglan mill help
« Reply #1 on: February 09, 2019, 08:13:38 PM »
Is it the screw that is gone? or the nut?
Or both?

Dave
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Offline crueby

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Re: Raglan mill help
« Reply #2 on: February 09, 2019, 08:22:10 PM »
From the bottom photo, it looks like at least the screw thread is gone, the threads look very thin in the middle, that machine has made lots of swarf in its day to wear that much!
I don't know about full parts, but threaded rod and nuts are available from commercial suppliers - that looks like an Acme thread?

Online steamer

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Re: Raglan mill help
« Reply #3 on: February 09, 2019, 08:30:44 PM »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

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Re: Raglan mill help
« Reply #4 on: February 09, 2019, 08:38:02 PM »
My thought is to document what is there completely.   Then purchase some threaded ACME Lead screw blank material.    Cut the old stub ends, and bore out for a close loctite fit and turn the OD of the threaded stock to fit.   Loctite them together and that takes care of the screw.

The nuts can be done similarly by boring the old nuts to accept a new nut loctited into place. 

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

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Re: Raglan mill help
« Reply #5 on: February 09, 2019, 09:21:08 PM »
If a lathe big/Long enough to do this isn't available SCC, and you're stuck,I'll do it for you.

I have a 9 x 36" and a 12 x 39"

Dave
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Damned ijjit!

Offline Bluechip

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Re: Raglan mill help
« Reply #6 on: February 09, 2019, 09:30:48 PM »
I have no knowledge of Raglans, lead-screws et al ... but .... ages ago ( about 8 yrs.-ish ) An acquaintance was involved in a CNC engraver / wood-butchering device and I think he sourced some lead-screws from here:

https://www.automotioncomponents.co.uk/en

No idea if this helps or not ...  :headscratch:  :old:

Dave

Offline scc

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Re: Raglan mill help
« Reply #7 on: February 09, 2019, 11:35:52 PM »
I like the Loctite idea Steamer Dave
Bluechip Dave,  thanks for the uk supplier info
At first glace I think the cost might put me off but will look into it.

Thank You all for help               Terry

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Re: Raglan mill help
« Reply #8 on: February 10, 2019, 01:22:54 PM »
The stock from Roton was not that expensive.  Shipping and VAT might be....

Dave
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Damned ijjit!

Online Jo

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Re: Raglan mill help
« Reply #9 on: February 10, 2019, 02:16:59 PM »
Lathes.co.uk do nuts, they probably also can point you in the direction of leadscrew suppliers.

Eric reckons it will cost more than the mill is worth  :(

Jo
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Offline scc

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Re: Raglan mill help
« Reply #10 on: February 10, 2019, 08:00:59 PM »
Eric could well be right Jo.     I've been looking in to it and I reckon I could buy some Acme taps and make new nuts.    I also think I could screwcut a new short shaft (the left hand one).  Looking closely at the long shaft and measuring flank thickness I think it will be OK with just the new nut.    I know it's an old machine but what could I replace it with and at what cost?          Terry

Offline pgp001

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Re: Raglan mill help
« Reply #11 on: February 10, 2019, 10:58:34 PM »
Why dont you add some DRO kit to it. That will overcome the problems with the worn screws.
They are available at very reasonable cost these days.

Phil

Offline Admiral_dk

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Re: Raglan mill help
« Reply #12 on: February 11, 2019, 12:20:40 PM »
I put a DRO on my lathe for similar reasons - this works nicely in regard to moving a distance, but not so well in regard to finish to the surface I'm doing with the lathe …. so a DRO isn't a complete solution in it self.

Offline Steamer5

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Re: Raglan mill help
« Reply #13 on: February 11, 2019, 01:15:48 PM »
Hi Terry,
 Think I've mentioned before my Dad has the same mill.
He brought it from a guy who had refurbish it. I'm not sure what was done to it, I'll ask Dad if he can remember, hes had it for quite awhile &  :old: age is creeping up on him.

On the cost front...well its either fix what you have, OR buy a replacement! I guess you could sell off the Raglan as parts to offset the new mill but I think that would be a pity!  NO I'm not looking at buying yours for spares! The cost to get it here would be horrible!

Cheers Kerrin
Get excited and make something!

Offline scc

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Re: Raglan mill help
« Reply #14 on: February 11, 2019, 09:27:20 PM »
I have had a play with the lathe and had the right change wheels for once. So I can cut a LH 8 tpi :whoohoo:  Next job is to make a suitable cutter and see what happens. If all goes well I shall order the taps for the nuts.
Thank you gents for the dro thoughts...might need to do that as well but probably only on the "modified digital caliper" route due to my limited budget.            Cheers     Terry