Forum sponsored by:
Point on a Thread Tap
| Vic | 08/08/2020 18:43:48 |
| 3453 forum posts 23 photos | I realise it’s there to aid manufacturing but why do some manufacturers leave the point on whilst others grind it off? Just wondering! |
| Howard Lewis | 08/08/2020 18:50:37 |
| 7227 forum posts 21 photos | Cost of removal? Aid to holding for sharpening? Not long ago, I need to tap some 5 x 0.5 mm holes, only 3.5 mm deep, so the tap was ground to a flat end. Fortunately, it worked O K despite having no lead in chamfer. Howard |
| Andrew Tinsley | 08/08/2020 19:23:48 |
| 1817 forum posts 2 photos | Depending on size of tap either a centre hole or a point is left by the manufacturer. They are there so that the tap can be accurately aligned on a tool and cutter grinder for resharpening. Andrew. |
| OneManEngineering | 08/08/2020 20:01:36 |
| 33 forum posts 48 photos | Generally speaking the smaller sizes have point tip so you need something like a cone to aid aligning. the bigger ones have hole so you can use a tap follower. answer is simple: there is no room to centre drill the little ones.
Greg |
| Martin Kyte | 08/08/2020 20:06:10 |
 3445 forum posts 62 photos | So you can use it as a dot punch. regards Martin |
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!
Sign up to our Newsletter
Sign up to our newsletter and get a free digital issue.
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
Donate
Register
Log-in
Model Engineer Magazine
- Percival Marshall
- M.E. History
- LittleLEC
- M.E. Clock
ME Workshop
- An Adcock
- & Shipley
- Horizontal
- Mill
Subscribe Now
- Great savings
- Delivered to your door
Pre-order your copy!
- Delivered to your doorstep!
- Free UK delivery!
All Forum Topics > The Tea Room > Point on a Thread Tap