0.750×40 tpi thread.

0.750×40 tpi thread.

This topic has 7 replies, 5 voices, and was last updated 9 January 2017 at 09:01 by Ian S C.

Viewing 8 posts - 1 through 8 (of 8 total)

Author

Posts
8 January 2017 at 11:46 #276465
mick70
Participant
@mick70
in MEW there is project for screw modification tool that is threaded 0.750×40.

i know in article it says use what you have but my taps go up m16 then start again at m24 or english equivalent.

couldn't see that size on tracey tools when i looked.

prob me not looking right.

what size is it?
Advert

8 January 2017 at 11:46 #18354
mick70
Participant
@mick70
8 January 2017 at 12:04 #276471
Russell Eberhardt
Participant
@russelleberhardt48058
Tracy tools catalogue 2010 ( my latest) lists 3/4 in x 40 tpi under Brass, Cycle, and special.

Russell.
8 January 2017 at 12:08 #276474
Ady1
Participant
@ady1
If you count it up then 0.75mm x 40 =30mm

Since there are 25.4mm in an inch then it's deffo not TPI

So it's a 40mm bar, threaded 0.75mm

In metric parlance, M40 x 0.75mm

Quite a rare beast, if I've read you correctly

Edited By Ady1 on 08/01/2017 12:14:39
8 January 2017 at 12:15 #276479
mick70
Participant
@mick70
sorry missed the " off 0.750.
8 January 2017 at 12:19 #276480
Ady1
Participant
@ady1
Aha!, I did wonder.

A fraction also makes discerning metric/imperial a bit easier

3/4" x 40TPI kinda thing
8 January 2017 at 12:30 #276483
HOWARDT
Participant
@howardt
If you read the article, John says he would make the thread 32 or 26tpi if he was making it again or 1mm pitch for metric. So M18 X 1 or use whatever you have, or cut on the lathe.
9 January 2017 at 09:01 #276697
Ian S C
Participant
@iansc
Quite an easy size to handle in the lathe.

Ian S C
Author

Posts

Viewing 8 posts - 1 through 8 (of 8 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Code of Conduct

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- Fixturing conundrum with Hemingway die filer kit
  Started by: timdotd in: Workshop Techniques
- 5
- 7
- 17 July 2026 at 20:38
  timdotd
- Use of insert type lathe tools
  Started by: JA in: Workshop Tools and Tooling
- 8
- 12
- 17 July 2026 at 19:43
  JA
- Help ID’ing Round Carbide Insert and Finding a Supplier 1 2
  Started by: Jon Gibbs in: Workshop Tools and Tooling
- 9
- 32
- 17 July 2026 at 19:19
  Vic
- Very Low Q
  Started by: duncan webster 1 in: Clocks and Scientific Instruments
- 2
- 2
- 17 July 2026 at 18:39
  John Haine
- How Good Are 3D Printers? 1 2
  Started by: Neil Wyatt in: 3D Printers and 3D Printing
- 19
- 43
- 17 July 2026 at 17:17
  Roderick Jenkins
- My adventures with a bench top CNC mill 1 2 3
  Started by: John Hinkley in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 8
- 70
- 17 July 2026 at 16:13
  JasonB
- New project for 2025 1 2
  Started by: SteveP in: I/C Engines
- 8
- 28
- 17 July 2026 at 13:52
  Roger B
- Myford VMC Spindle Advice Please. 1 2 3
  Started by: Nigel Graham 2 in: Manual machine tools
- 12
- 57
- 17 July 2026 at 13:24
  Bazyle
- Maisie
  Started by: ian Holdsworth in: Beginners questions
- 10
- 14
- 17 July 2026 at 12:48
  KenL
- My Intro
  Started by: Martin Freestone in: Introduce Yourself – New members start here!
- 6
- 6
- 17 July 2026 at 11:42
  Howard Lewis
- Plug in Solar 1 2 3 4
  Started by: Vic in: The Tea Room
- 25
- 76
- 16 July 2026 at 22:38
  Mark Rand
- Smart & Brown model A spindle lock
  Started by: old mart in: Workshop Tools and Tooling
- 2
- 11
- 16 July 2026 at 19:44
  old mart
- Bonding brass hubs to steel
  Started by: mikemunson in: Beginners questions
- 6
- 8
- 16 July 2026 at 17:09
  Diogenes
- Comm Ads
  Started by: bernard towers in: Website Questions, Comments, and Suggestions
- 4
- 20
- 16 July 2026 at 12:14
  JasonB
- QCTP 1 2
  Started by: James A in: Workshop Tools and Tooling
- 20
- 35
- 16 July 2026 at 10:34
  John Haine
- Bridgeport Series 1 CNC 1 2 3
  Started by: tomcnc in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 12
- 60
- 16 July 2026 at 07:21
  seemack
- Bending copper tube?
  Started by: Bo’sun in: Workshop Techniques
- 18
- 22
- 15 July 2026 at 23:29
  Nigel Graham 2
- What Did You Do Today 2026 1 2 … 5 6
  Started by: JasonB in: The Tea Room
- 42
- 146
- 15 July 2026 at 23:05
  Michael Gilligan
- Help please! Workshop clearance
  Started by: ksw in: General Questions
- 11
- 24
- 15 July 2026 at 22:23
  ksw
- Pipe Size Puzzle.
  Started by: Nigel Graham 2 in: Locomotives
- 5
- 11
- 15 July 2026 at 18:15
  Nigel Graham 2
- Solar Panels 1 2
  Started by: Vic in: The Tea Room
- 17
- 45
- 15 July 2026 at 18:11
  An Other
- Band saw 1 2 3 4
  Started by: Peter Simpson 3 in: Beginners questions
- 25
- 81
- 15 July 2026 at 16:54
  ega
- What is this? 1 2
  Started by: Sonic Escape in: General Questions
- 18
- 26
- 14 July 2026 at 19:52
  Andy Stopford
- Offen imperial bore mic gauge.
  Started by: Graeme Seed in: Workshop Tools and Tooling
- 6
- 13
- 14 July 2026 at 19:30
  Graeme Seed
- THE MONTHLY TIPS COMPETITION – THE ENTRY THREAD! 1 2
  Started by: Neil Wyatt in: Hints And Tips for model engineers
- 19
- 46
- 14 July 2026 at 17:40
  Neil A

Viewing 25 topics - 1 through 25 (of 25 total)

View full reply list.

Latest Issue

July 2026

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies