Its nearly there !

Advert

New Replies

Report Bug

Help/FAQs

Its nearly there !

This topic has 29 replies, 15 voices, and was last updated 26 March 2019 at 07:17 by Dave Springate.

Viewing 25 posts - 1 through 25 (of 30 total)

1 2 →

Author

Posts
17 March 2019 at 14:45 #400823
Dave Springate
Participant
@davespringate
Finally, got the lathe back together and I'm really pleased with it although I am so tempted to strip it again and spray the bed, tailstock and headstock as I have the covers as its a much better finish. Trouble is I want to start using it. Just waiting on new switch gear and should be able to get it up and running.
Advert

17 March 2019 at 14:45 #19272
Dave Springate
Participant
@davespringate
My ML10 rebuild
17 March 2019 at 15:06 #400825
Former Member
Participant
@formermember19781
[This posting has been removed]
17 March 2019 at 15:25 #400828
Mick B1
Participant
@mickb1
What's up with my eyesight? I think it looks pretty good, and I can only see the faintest mismatch.

Thing I'd wanna do it put in a leadscrew clutch and handwheel dial, like my old Speed 10 had. Good for milling in the vertical slide, and dialing off exact facing lengths, with halfnuts engaged and without disconnecting the geartrain.
17 March 2019 at 18:12 #400871
Dave Springate
Participant
@davespringate
A leadscrew clutch is on my list of things to do as I have some drawings to follow, as is a handwheel dial, the first job is a new handle for the original drum switch, although I won't be using it. Thought it might be a nice beginner project to get something turned to size and to try and cut a thread.
17 March 2019 at 18:22 #400872
duncan webster 1
Participant
@duncanwebster1
Paint doesn't make it work any better, and it looks pretty good to me anyway.

Rather than a clutch have you considered a 3 phase motor? Much smoother running and much less troubled by stop/starts. Could easily be cheaper as well.

Edited By duncan webster on 17/03/2019 18:23:56
17 March 2019 at 18:48 #400880
Dave Springate
Participant
@davespringate
Hi Duncan, yes I have considered three phase with a VFD but the motor that came with it was running fine when I tested it and will do to get me started. I do appreciate that three phase and its benefits would be the way to go when this one packs up though and it will be on the cards at some point. I just want to get going and use the lathe even if its a simple thing like a handle for the old drum switch

Here is the drum switch, i have stripped cleaned and painted it, its a type A Dewhurst switch and it appears to be threaded where the handle fits. Does anyone know how to measure this thread?

Edited By Dave Springate on 17/03/2019 19:19:05
17 March 2019 at 19:48 #400891
Jon Lawes
Participant
@jonlawes51698
Those Dewhurst switches are great for changing direction but for starting and stopping they seem to arc and erode over time. If I can respectfully suggest another switch inline which you use for starting and stopping the lathe, leaving the Dewhurst engaged and only changed when a direction change is required. Its is also a good opportunity to include a No Volt Release switch, which is a good safety improvement anyway.

The work you have done on restoring that lathe is superb, good work.

Jon.
17 March 2019 at 20:09 #400896
Emgee
Participant
@emgee
Dave, measure the thread internal diameter, this is the Core size and is close to the tapping drill size for the thread in the spindle. Check thread charts for a similar size core and you may find an exact match, or the thread size may be the same as diameter of the operating handle if someone could measure.
If you have access to some thread gauges you will be able to confirm the TPI by inserting gauge into the threaded hole, from memory it may be 1/4" W or BSF.

Emgee
17 March 2019 at 21:34 #400910
AJW
Participant
@ajw
That looks great, super job – don't get it all messed up though!

Alan
17 March 2019 at 21:54 #400911
roy entwistle
Participant
@royentwistle24699
Dave Try to insert a bolt of the appropriate size bearing in mind that it will probably be imperial or BA

Roy
17 March 2019 at 22:10 #400913
Mick B1
Participant
@mickb1
I see all the comments about Dewhurst switches – how did I get away with using mine to start and stop my Speed 10 many thousands of times over 15 years without a hint of a problem?
17 March 2019 at 22:29 #400914
Hopper
Participant
@hopper
Looks good. Don't forget the bed and apron will quickly be covered with oil and swarf once you start using it, covering up any glossy paintwork underneath.
18 March 2019 at 10:05 #400961
Dave Springate
Participant
@davespringate
Hopper
21 March 2019 at 07:28 #401467
Dave Springate
Participant
@davespringate
Still waiting for a NVR switch to turn up so……

Edited By Dave Springate on 21/03/2019 07:30:40
21 March 2019 at 13:19 #401528
Graham Flavell
Participant
@grahamflavell13482
Dave

5/16 Whitworth on my Dewhurst type A.

Regards

Graham
21 March 2019 at 14:13 #401534
Dave Springate
Participant
@davespringate
Brilliant, thanks Graham, that's exactly what I have to try and make
24 March 2019 at 14:18 #401969
Dave Springate
Participant
@davespringate
All back together now after rubbing back down and spraying the few bits that I had hand painted. Really pleased with how it turned out. Just waiting on an NVR switch to turn up and I can finally get the motor installed and get it up and running.
24 March 2019 at 15:51 #401977
Bazyle
Participant
@bazyle
Looking good. I can still remember looking enviously at one at the ME show in about 1981 when they cost £600 without tray, motor, or chuck and were the cheapest lathe at the show apart from a tiny flexispeed.

For finding threads when a helpful forum isn't available just screw in a bit of soft wood or plastic loosely so it is indented with the thread to measure against a rule more easily.

For those misusing their Dehursts and getting away with it because they are old fashioned solidly built – the next owner will suffer from your lack of consideration.
24 March 2019 at 16:34 #401984
Jon Lawes
Participant
@jonlawes51698
I hope its not too good to use, that would be criminal!
24 March 2019 at 17:58 #401997
Jim Guthrie
Participant
@jimguthrie82658
Posted by Bazyle on 24/03/2019 15:51:34:

Looking good. I can still remember looking enviously at one at the ME show in about 1981 when they cost £600 without tray, motor, or chuck and were the cheapest lathe at the show apart from a tiny flexispeed.

Mine cost just over £100 in 1973 (Ted Heath's three day week year) and I remember that the price doubled when I added in the three jaw, four jaw and Jacobs tailstock chuck. So that's a fair bit of inflation given that my lathe was the original plain bearing version and your 1981 version probably was a Speed 10.

Jim.
24 March 2019 at 22:16 #402029
Mick B1
Participant
@mickb1
Posted by Bazyle on 24/03/2019 15:51:34:

…

For those misusing their Dehursts and getting away with it because they are old fashioned solidly built – the next owner will suffer from your lack of consideration.

There was no lack of consideration, because I'd never heard any of the tales current here of the Dewhurst being unfit for this purpose, and in any case the lathe had been in use with that switch probably since the late '70s. It ran from 2000 to 2015 in my workshop with no evidence of fault in the switch. It sounded to me as if a contactor operated when the switch did, so perhaps it wasn't handling full mains voltage, but I had no reason to investigate.
25 March 2019 at 06:54 #402055
Dave Springate
Participant
@davespringate
Thanks Bazyle I will try that little thread finding tip !
25 March 2019 at 09:44 #402069
SillyOldDuffer
Moderator
@sillyoldduffer
Posted by Mick B1 on 24/03/2019 22:16:46:

Posted by Bazyle on 24/03/2019 15:51:34:

…

For those misusing their Dehursts and getting away with it because they are old fashioned solidly built – the next owner will suffer from your lack of consideration.

There was no lack of consideration, because I'd never heard any of the tales current here of the Dewhurst being unfit for this purpose, and in any case the lathe had been in use with that switch probably since the late '70s. It ran from 2000 to 2015 in my workshop with no evidence of fault in the switch. It sounded to me as if a contactor operated when the switch did, so perhaps it wasn't handling full mains voltage, but I had no reason to investigate.

Yes, but it's worth knowing that Dewhurst Switches fitted to Myford's have long been a source of trouble. I believe the main problem is they aren't designed to switch hot loads and the resulting sparks damage the contacts. I've also seen suggestions that the mechanical design isn't as good as it might be. Can anyone more knowledgeable comment?

Dave
25 March 2019 at 15:42 #402104
Mick B1
Participant
@mickb1
Posted by SillyOldDuffer on 25/03/2019 09:44:30:

Posted by Mick B1 on 24/03/2019 22:16:46:

Posted by Bazyle on 24/03/2019 15:51:34:

…

For those misusing their Dehursts and getting away with it because they are old fashioned solidly built – the next owner will suffer from your lack of consideration.

There was no lack of consideration, because I'd never heard any of the tales current here of the Dewhurst being unfit for this purpose, and in any case the lathe had been in use with that switch probably since the late '70s. It ran from 2000 to 2015 in my workshop with no evidence of fault in the switch. It sounded to me as if a contactor operated when the switch did, so perhaps it wasn't handling full mains voltage, but I had no reason to investigate.

Yes, but it's worth knowing that Dewhurst Switches fitted to Myford's have long been a source of trouble. I believe the main problem is they aren't designed to switch hot loads and the resulting sparks damage the contacts. I've also seen suggestions that the mechanical design isn't as good as it might be. Can anyone more knowledgeable comment?

Dave

All the same, I'm finding it hard to fit a mechanism that functioned in regular use with no maintnenance for 35+ years without fault into my definition of 'defective'.
Author

Posts