Forum sponsored by:

14BA die and 15 thou split pin.

Working at a small scale

Search for: in Thread Title in

File Handle	15/08/2023 18:37:38
250 forum posts	Thanks for all of the replies. I was aware that I shouldn't be calling them cotter pins, not sure how I picked up the error, I was curious if I was alone in doing so. Looking online 16 BA "nuts and bolts" seems to be the smallest commonly available. Seeing the price of 14BA dies I am sort of regretting not buying it, but I don't really have a use for it. I am impressed with the small scale that some people can work to. I do have a pack of 1/64th drills that I have had for decades, but never really had a need to use them. Probably not confident to try. I have never looked at how well their tips are ground, will check them out. Keith
Grindstone Cowboy	15/08/2023 18:44:01
1160 forum posts 73 photos	Posted by Simon0362 on 15/08/2023 14:21:27: Posted by Bazyle on 15/08/2023 10:59:39: The lathe they used for this had a system for correcting leadscrew errors which must have worked down in the tenth of thous region. Sheer curiosity, but how on earth do they do that? Don't know about that particular instance, but a late friend who was apprenticed at Broadbent lathes once tried to explain to me a system for doing this - not sure I got all the details, but it involved a sort of linear cam, or wavy ramp, parallel to the leadscrew. The leadscrew nut (possibly a solid nut rather than half-nuts) was rotated slightly in both directions by this, thus cancelling out pitch deviations in the leadscrew thread. Hope I've explained that clearly, it did make sense when he told me, although I have since wondered how they got the nut follower to bear on the cam, some sort of spring-loading, possibly? Rob

<< First < Prev 1 2

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

hemingway ball turner
04/07/2025 14:40:26
*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
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