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Author Topic: Scrap Yards  (Read 33702 times)

bogstandard

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Re: Scrap Yards
« Reply #25 on: November 16, 2008, 06:33:28 AM »
Actally Darren, your maths is off slightly, it is in fact 0.02mm, which is a standard metric lathe scale resolution.

Also 0.0254mm relates to 0.001", so very close to imperial, but not quite.

If you did both the topslide (assuming it has the same scale markings) and crosslide, you would in theory be able to convert your machine to metric. I think you said that this has no leadscrew, so it is perfectly feasible.

But be aware, 2mm pitch doesn't sound very big, but my main leadscrew is 3mm and that is nearly 1" diameter, so you would have to find out the diameter first to see if you can squeeze the screw and nut into the leadscrew tunnel.

Nothing is ever as simple as you think.

John
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Offline Darren

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Re: Scrap Yards
« Reply #26 on: November 16, 2008, 07:32:11 AM »
Thanks for correcting that error John  ;D

This brings me back to these items, at these prices with the fact that the screw finish "should" be much better than I can manage seems to be the easiest option.

What I'm not sure about is the trapezoid thread. Do I assume this is simple the modern metric eqiv of the imperial Acme thread form?

My current screw is 3/8, a tad under 10mm dia, so the above should be fine.  As long as I can machine the end. I'll have to ask the seller about that.

Yep, you are correct John, no leadscrew, so no worries there.

Darren

http://cgi.ebay.co.uk/TR10x2D-Trapezoidal-Spindle-Acme-Ballscrew-Leadscrew_W0QQitemZ280239661742QQcmdZViewItemQQptZUK_BOI_Metalworking_Milling_Welding_Metalworking_Supplies_ET?hash=item280239661742&_trksid=p3286.c0.m14&_trkparms=66%3A3|65%3A1|39%3A1|240%3A1318

http://cgi.ebay.co.uk/TRTAP-M10x2RH-Trapezoidal-Tap-Acme-Ballscrew-Leadscrew_W0QQitemZ220307826465QQcmdZViewItemQQptZUK_BOI_Metalworking_Milling_Welding_Metalworking_Supplies_ET?hash=item220307826465&_trksid=p3286.c0.m14&_trkparms=66%3A3|65%3A1|39%3A1|240%3A1318
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Offline Darren

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Re: Scrap Yards
« Reply #27 on: November 16, 2008, 07:41:43 AM »
Shaped like this

Trapezoidal




Darren
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Offline John Stevenson

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Re: Scrap Yards
« Reply #28 on: November 16, 2008, 07:52:00 AM »
3/8" x 10 RH is standard size thread for a Myford both cross slide and top slide.

Contact this guy.

For Sale
Tools
Breaking Myford ML7 & Super 7 lathes most parts available.We accept cards on mail order. Sorry we do not stock parts for other makes of lathes.We are open mon-fri 9-5pm.

JIm Marshall (Trade)
lathe-parts[ at ]new-or-used.co.uk
01205 480 666
Near Boston Lincs
UK

He's very good and ships worldwide.

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John Stevenson

bogstandard

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Re: Scrap Yards
« Reply #29 on: November 16, 2008, 08:13:30 AM »
Nice one John, just the person to tell us where to get everything from.

John
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Offline CrewCab

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Re: Scrap Yards
« Reply #30 on: November 16, 2008, 01:53:01 PM »
Mr Stevenson  :thumbup:

Blimey is nowhere sacred  :D ................ welcome aboard Sir  8)

CC
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Offline Darren

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Re: Scrap Yards
« Reply #31 on: November 16, 2008, 03:43:19 PM »
Part tiled the new bathroom floor today,,,oo,ps sorry wrong forum   ;D

Well apart from that I stripped the compound slide on the Smart and Brown to check if all was the same there regarding the screw.
Alas it's not, same design totally, except it's a left hand thread, so one right and one left...

Ho hum, more tools to buy then......and I need a 3/8 die too or do it on the mini.....but that's no issue really.

Darren
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Offline CrewCab

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Re: Scrap Yards
« Reply #32 on: November 16, 2008, 03:50:27 PM »
Quote from: Darren on November 16, 2008, 03:43:19 PM
Part tiled the new bathroom floor today

No worries Darren, I (think) I finished the kitchen tiling today  :beer:






































just don't ask in which decade I started it  ::)



CC
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Offline dsquire

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Re: Scrap Yards
« Reply #33 on: November 16, 2008, 07:48:38 PM »
CC

What Century did you start it???   I just had to do it.

 :beer:

Don
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Offline Darren

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Re: Scrap Yards
« Reply #34 on: December 01, 2008, 05:03:52 AM »
Another update, decided to do a little more on this last night.
Well my ER32/MT3 collet holder and a set of collets turned up. You know how it goes, new toy and all that.
Still only armed with some new 5mm end mils I set about a little end facing and cutting a slot.

I needed a flat on one side of this disk



Finished off



Now the slot



And finally a little marking out followed with 3 center punch marks ready for drilling.



Well that was enough for one nights relaxation therapy.. :wave:
« Last Edit: December 01, 2008, 06:36:31 AM by Darren »
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Offline HS93

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Re: Scrap Yards
« Reply #35 on: December 01, 2008, 12:00:16 PM »
Are any of these correct for your needs , I have found it better to go direct to thee site than via e-bay as they have a larger range
. Plus they have the speck for most items, they are quick on delivery.

Marchant Dice Ltd

http://www.worldofcnc.com/products.asp?category=Trapezoidal&subcategory=Single+Start+Spindles

http://www.worldofcnc.com/main.asp

Peter
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Offline Darren

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Re: Scrap Yards
« Reply #36 on: December 01, 2008, 01:20:33 PM »
Hi Peter,

Firstly welcome to the forum and thanks for your first post.
I think you may have meant to post your message on another thread here, (just so people can follow) http://madmodder.net/index.php?topic=460.0

That is where I bought my spindle and tap from, but off ebay.

Any chance you can post something in the welcome area and let us know a little about what area interest you most in machine work. I guess if you are buying spindles you are up to something interesting  :wave:

Regards
Darren
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Offline Darren

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Re: Scrap Yards
« Reply #37 on: December 01, 2008, 02:54:33 PM »
Darn it...!!

Just broke a HSS 4mm tap in the piece....*^$%*"

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Offline Darren

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Re: Scrap Yards
« Reply #38 on: March 27, 2009, 06:05:43 PM »
I dug this one out from beyond the grave back of the drawer.

If you remember I broke a tap in it and put it aside till now.
Well with my new "killer" drill bits, tungsen carbide tipped, I decided to have a go and see if I could drill the broken 5mm HHS tap out. There was a fair bit of it in there, but what the heck, nothing ventured and all that.

Set it up ready to murder, as Bogs would say, over the offending hole....



Well no real drama, used a 4.5mm bit followed by a 5mm. All holes now done



Even the tap behaved itself, on this one I tapped a little, fully retracted, tapped a little more and so on. It was tight as the drill bit got thrown off very slightly.
The reverse feature on the new mill was nice in this instance to retract the tap. (tapped manually though) New size was 6mm.



All done and grub screws inserted into their new home.



Well, I didn't expect this to work, but that's one project saved...... :ddb: :ddb: :ddb:

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bogstandard

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Re: Scrap Yards
« Reply #39 on: March 27, 2009, 06:10:49 PM »
Nice rescue Darren.

There is usually a way to 'fix' most things.

Bogs
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Offline Darren

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Re: Scrap Yards
« Reply #40 on: March 27, 2009, 06:37:17 PM »
I've just spotted something about my vice, 5 pic's up...

It's got a threaded hole in the side of it, never noticed that before. Fancy spotting it in a picture.... :doh:

For a stop I guess?
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Offline Divided he ad

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Re: Scrap Yards
« Reply #41 on: March 27, 2009, 09:34:13 PM »
Well I never expected that to work!

Spot on!!  :thumbup:

Quote
It's got a threaded hole in the side of it, never noticed that before. Fancy spotting it in a picture....  :doh:

It's amazing what you find when you are not looking for it ehh?  If it is not for a stop Darren, I'm sure it will be some time soon  :)



So I haven't read it...... What ya makin'?



Ralph.
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Offline sbwhart

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Re: Scrap Yards
« Reply #42 on: March 28, 2009, 02:47:36 AM »
Blimey Darren

You got me really confused with this one  :scratch: first it was a QCTP then your working on something that looks like a ball turner with a broken tap:-  I'd thought I'd just woken up from a comma  :lol:

Bit of back reading sorted me out though.

Nice fix by the way

Cheers
 :wave:
Stew
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Offline Darren

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Re: Scrap Yards
« Reply #43 on: March 28, 2009, 07:03:48 AM »
My workshop is like my mind Stew....all over the place  :lol:


I tend to work on several things at the same time, I do a bit, think a bit, do a bit more..... :ddb:

Just do something else while I'm thinking, I find it good therapy and it allows me to breathe  :dremel:
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Offline Divided he ad

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Re: Scrap Yards
« Reply #44 on: March 28, 2009, 09:42:22 AM »
Ok..... So I got the time to re-read this lot..... From November!!! No wonder I couldn't recall  :scratch:




So full steam ahead then....? 

So you'll be making some fun bits for the end of all the handles and shafts you can find?   :)



Keep us posted,



Ralph.
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