Forum sponsored by:

Notes on Screw Gauges -NPL

Search for: in Thread Title in

Michael Gilligan	16/10/2022 09:56:28
23121 forum posts 1360 photos	Whilst pondering the discussion here: LINK https://www.model-engineer.co.uk/forums/postings.asp?th=183696&p=1 I found this 133 page ‘booklet’ yesterday: LINK https://www.npl.co.uk/dimensional/screw-gauge-booklet … and would rate it ‘astonishing’ In a world increasingly full of that’ll do approximations [the camera/tripod specification springs to mind], it is interesting to look at the pages numbered 79 and 80 [quote] Whitworth Thread Form The depths of thread calculated from the data in Fig. 42 are rounded to the nearest 0.0001 in., and are given, together with the corresponding values for s, r and H in Table 10. [/quote] The whole booklet is full of little surprises ! Not easy reading, but a useful reference by the Masters of the Art. MichaelG.
Paul Lousick	16/10/2022 12:48:20
2276 forum posts 801 photos	Some good reading about gauges for screw threads. One of my previous jobs was working for Borg Warner (American automotive supplier) in Australia, designing gauges in in one of their gearbox manufacturing plants. Gauges were use on their production lines and in their metrology labs. Learnt a lot about tolerances and the accumulation of errors when dimensioning a drawing. Gauges for measuring shafts, etc to ± 1/1000" tolerance had to be made ± 2/10000".

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