Forum sponsored by:

Posilock threads.

Search for: in Thread Title in

Chris	21/05/2009 22:55:12
87 forum posts 13 photos	Does anyone know what the thread is on the posilock milling chuck (mt 3)? I have a Clarke 500 lathe and need to make a draw bar. Chris.
David Clark 1	22/05/2009 07:34:41
3357 forum posts 112 photos 10 articles	Hi Chris What is the internal diameter of the thread? Usually drawbars are 3/8 Whit or 10mm. The Clarke is more likely to be metric so I would try a 10mm bolt in it first. If that fits, buy a bit of 10mm studding (threaded rod) from B&Q. Larger Bridgeport type mills are usually 7/16UNF. regards David
Richmond	22/05/2009 11:20:37
73 forum posts 632 photos 64 articles	Hi, From memory, some of the MT3 chucks have an M12 thread for use as a drawbar. A quick call to Chester should resolve this for you. Rgds
Chris	22/05/2009 22:07:20
87 forum posts 13 photos	Hi David and Richmond, Thanks for your help. Turns out to be 100 but not the pitch of standard studding. Found a bolt at work ( I'm the maintenance man at a lead mining museum, how obscure can you get) that fit and cut,sleeved and welded it to the Clarke drawbar. Success. plus a lesson learned,10mm is not always what you think! Thanks again, Chris.
GarethP	23/05/2009 09:51:14
5 forum posts	If its a old Clarkson posilock it'll be whit - I took mine to the local engineering merchant and told them I thought it was 3/8 whit, they then produced a length of metric stud which did screw in but rattled about - I insisted on a piece of whit stud and it fitted perfectly.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts

*Oct 2023: FORUM MIGRATION TIMELINE*
05/10/2023 07:57:11
Making ER11 collet chuck
05/10/2023 07:56:24
What did you do today? 2023
05/10/2023 07:25:01
Orrery
05/10/2023 06:00:41
Wera hand-tools
05/10/2023 05:47:07
New member
05/10/2023 04:40:11
Problems with external pot on at1 vfd
05/10/2023 00:06:32
Drain plug
04/10/2023 23:36:17
digi phase converter for 10 machines.....
04/10/2023 23:13:48
Winter Storage Of Locomotives
04/10/2023 21:02:11
More Latest Posts...
View All Topics

Support Our Partners

Shopping Partners

Subscription Offer

Latest "For Sale" Ads

Reeves** - Rebuilt Royal Scot by Martin Evans
by John Broughton
£300.00
BRITANNIA 5" GAUGE James Perrier
by Jon Seabright 1
£2,500.00
Drill Grinder - for restoration
by Nigel Graham 2
£0.00
WARCO WM18 MILLING MACHINE
by Alex Chudley
£1,200.00
MYFORD SUPER 7 LATHE
by Alex Chudley
£2,000.00
More "For Sale" Ads...

Latest "Wanted" Ads

D1-3 backplate
by Michael Horley
Price Not Specified
fixed steady for a Colchester bantam mark1 800
by George Jervis
Price Not Specified
lbsc pansy
by JACK SIDEBOTHAM
Price Not Specified
Pratt Burnerd multifit chuck key.
by Tim Riome
Price Not Specified
BANDSAW BLADE WELDER
by HUGH
Price Not Specified
More "Wanted" Ads...

Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues