Forum sponsored by:

tapping drill size

Search for: in Thread Title in

steve williams 3	08/07/2010 21:01:21
28 forum posts 49 photos	could anyone please tell me the tapping drill size for a 1/4 32 tpi thread cheers steve
NJH	08/07/2010 21:06:59
2314 forum posts 139 photos	Hi Steve 5.7mm in my book Cheers Norman
steve williams 3	08/07/2010 21:11:11
28 forum posts 49 photos	cheers norman its now in my book steve
Terryd	09/07/2010 06:15:23
1946 forum posts 179 photos	Hi Steve, You might like to download Alan Munday's Model Engineers Utilities which has a wealth of information and data such as thread details (tapping drills etc) which are invaluable. Download here Terry
Terryd	09/07/2010 06:15:23
1946 forum posts 179 photos	Hi Steve, You might like to download Alan Munday's Model Engineers Utilities which has a wealth of information and data such as thread details (tapping drills etc) which are invaluable. Download here Terry
Terryd	09/07/2010 06:15:24
1946 forum posts 179 photos	Hi Steve, You might like to download Alan Munday's Model Engineers Utilities which has a wealth of information and data such as thread details (tapping drills etc) which are invaluable. Download here Terry
Nobby	15/01/2011 00:02:56
587 forum posts 113 photos	Hi How about a Zeus book Metris addition Regards Nobby
John Stevenson	15/01/2011 00:07:26
5068 forum posts 3 photos	Has he written three utilities terry ? Sorry couldn't resist I must agree with terry though in that there is some very good information in these utilities, well worth having loaded on a shop computer. John S.
Terryd	15/01/2011 05:29:04
1946 forum posts 179 photos	Hi John S, Unfortunately no, only one set as far as I know. It was just one of those days when the website gives an error message after posting so one sends it again, I've learned my lesson now. Seriously with these utilities one needs a reference book as much as one needs a slide rule nowadays, as long as you have a workshop computer or old, bashed up laptop limping along. Best regards Terry.
JasonB	15/01/2011 11:03:03
25215 forum posts 3105 photos 1 articles	NJH are you sure its 5.7mm. In my books thats the size for 1/4x40, for 32tpi you want 5.3mm. Didn't think Zeuz had ME sizes in it. J Edit just realised this is 6months old, why bring up an old post? Edited By JasonB on 15/01/2011 11:04:05
KWIL	15/01/2011 11:32:40
3681 forum posts 70 photos	Hang on Jason, Nobby has to get his forum post numbers up somehow!
Nicholas Farr	15/01/2011 11:37:49
3988 forum posts 1799 photos	Hi Jason, no, Zeus dosen't have ME in my copy. However, MEW data cards say 5.7mm, and on the back of Tracy Tools catalogue it has No 3 drill which is 5.4mm. So there seems to be some differance of opinion. Regards Nick.
Chris Trice	15/01/2011 11:57:51
1376 forum posts 10 photos	Tubal Cain quotes 5.5mm for 85% thread engagement to 5.75mm for 60% engagement. The recommended is 5.65mm although I'd drop it to 5.6mm without fear of overstressing the tap. Remember Zeus tables assume a perfectly rigid commercial set up with new cutters and excess torque safety features. If you read the WPS book on the subject, the reasons for drilling very slightly larger than the Zeus figures becomes apparent and valid. Neither does it appreciably weaken the resulting thread but you'll break far fewer taps.
Terryd	15/01/2011 12:38:06
1946 forum posts 179 photos	Hi Michael, That is as near as dammit as given on Alan Munday's utilities (5.54mm). T
JasonB	15/01/2011 13:29:26
25215 forum posts 3105 photos 1 articles	My tracy says 5.3mm, thats what was to hand this morning. Just looked at the table I use down in the workshop and that has 5.6mm, didn't think my threads were that sloppy J Edited By JasonB on 15/01/2011 13:31:49
Chris Trice	15/01/2011 16:33:43
1376 forum posts 10 photos	If you guys can find a 5.54mm or 5.56mm drill...... Go for 5.6mm. I think there's a good chance of locking the tap up at 5.3mm. Remember there's an element of extrusion when tapping a thread, not just a clean cut. That's why you can drill something, tap it but then find you can't pass the original drill bit through the tapped hole. Edited By Chris Trice on 15/01/2011 16:34:25
Nobby	16/01/2011 17:13:00
587 forum posts 113 photos	Hi Whoops Nobby
Weldsol	21/01/2011 09:59:24
74 forum posts	I don't know how they worked it out but GLR site give 6.4 as a tapping drill size. Double Whoops Paul
Alexander13	21/01/2011 14:11:21
8 forum posts	I bought a steel ruler from toolstation and it had tap and drill sizes marked on the back.
Dougie Swan	21/01/2011 18:46:38
269 forum posts 73 photos	A long time ago we were promised a reprint of the old ME data wallchart, with all of this info Still waiting Dougie

1 2 Next > Last >>

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