Change gears

Change gears

This topic has 8 replies, 6 voices, and was last updated 27 October 2017 at 09:57 by Yngvar F.

Viewing 9 posts - 1 through 9 (of 9 total)

Author

Posts
26 October 2017 at 02:20 #323583
kevin barron
Participant
@kevinbarron12390
I have hercus 260atm metric lathe set up to cut imperial would like to know metric change gear set iup it has gear box
Advert

26 October 2017 at 02:20 #8929
kevin barron
Participant
@kevinbarron12390
Hercus 260atm metric lathe
26 October 2017 at 06:38 #323585
John Ockleshaw 1
Participant
@johnockleshaw1
Hello Kevin, Here are the gears for metric pitches. They will suit you if your lead-screw is 8 TPI.

Regards, John
26 October 2017 at 07:09 #323587
John Ockleshaw 1
Participant
@johnockleshaw1
This may be more easily read Kevin
26 October 2017 at 23:52 #323806
kevin barron
Participant
@kevinbarron12390
My leadscrew is metric 3mm but change gears set up to cut imperial need gears for metric with quick change gearbox
27 October 2017 at 00:36 #323810
Jens Eirik Skogstad 1
Participant
@jenseirikskogstad1
Kevin,.. you can download the program for calculating the change gear if pitch of the lead screw and a set of change gear is known and the threading size is selected to create threads.

Go to this link –> **LINK** and download the program –> NthreadsP

and if your lathe has a screwcutting gearbox —> BoxfthreadP
27 October 2017 at 08:33 #323837
Hopper
Participant
@hopper
You might find some charts on one of the South Bend lathe sites, yahoo group or even the SB section on Home Shop Machinist forum. Pretty sure as Hercus copied SB to a tee the gearing would be the same.

Hercus are still in business and still reconditioning the 260s so they could probably tell you. And there is a very enthusiastic fellow selling parts for the older Herci who might be able to help too.Here **LINK**
27 October 2017 at 09:17 #323854
Robbo
Participant
@robbo
Kevin

This chart for gearbox and changewheel lathes may help, as well as Jens links.
27 October 2017 at 09:57 #323856
Yngvar F
Participant
@yngvarf
You need a 18t or 45t stud gear. A idler gear. usually 80t on South Bend clones. and a 60t screw gear.
Author

Posts

Viewing 9 posts - 1 through 9 (of 9 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
- Workshop decoration 1 2
  Started by: Sonic Escape in: The Tea Room
- 14
- 26
- 31 May 2025 at 23:36
  Bazyle
- Boiler Design – issue 4765 1 2 3
  Started by: Charles Lamont in: Model Engineer & Workshop
- 17
- 55
- 31 May 2025 at 22:49
  duncan webster 1
- Replacement gear
  Started by: David George 1 in: Manual machine tools
- 7
- 9
- 31 May 2025 at 22:45
  John Hinkley
- Sandvik Coromant 20mm hand-scraper
  Started by: flatline in: Workshop Tools and Tooling
- 8
- 16
- 31 May 2025 at 22:15
  Neil Lickfold
- A new lathe
  Started by: Sonic Escape in: The Tea Room
- 7
- 7
- 31 May 2025 at 22:04
  Neil Lickfold
- Gear cutting
  Started by: str8axle57 in: Introduce Yourself – New members start here!
- 8
- 19
- 31 May 2025 at 21:12
  Pete Rimmer
- Building Bernard Tekippe’s Precision Regulator 1 2 … 5 6
  Started by: Chris Raynerd 2 in: Clocks and Scientific Instruments
- 14
- 132
- 31 May 2025 at 19:57
  Michael Gilligan
- laths and mills
  Started by: sonic_m1etn in: Workshop Tools and Tooling
- 3
- 3
- 31 May 2025 at 19:22
  SillyOldDuffer
- Model dynamo drawings
  Started by: Dougie Swan in: General Questions
- 3
- 4
- 31 May 2025 at 18:38
  Dougie Swan
- The Latest INDEX to Model Engineer & Workshop (Also past issues of MEW) 1 2
  Started by: David Frith in: Model Engineer & Workshop
- 7
- 37
- 31 May 2025 at 16:04
  David Frith
- Seig C0 baby lathe
  Started by: msrt7mcfl7 in: General Questions
- 8
- 11
- 31 May 2025 at 00:24
  msrt7mcfl7
- Finding Unified rivnuts
  Started by: old mart in: Help and Assistance! (Offered or Wanted)
- 5
- 9
- 30 May 2025 at 20:15
  old mart
- HaLifax 10″ Lathe for sale
  Started by: Richard Bartholomew 3 in: Help and Assistance! (Offered or Wanted)
- 2
- 2
- 30 May 2025 at 18:38
  JasonB
- Drilling holes in blades?
  Started by: Bo’sun in: The Tea Room
- 7
- 18
- 30 May 2025 at 17:50
  Bo’sun
- Faulty Warco 1630 Item 4085
  Started by: john fletcher 1 in: Manual machine tools
- 9
- 17
- 30 May 2025 at 17:24
  Dave Halford
- Inspection Cover fasteners
  Started by: Vic in: Materials
- 12
- 15
- 30 May 2025 at 17:09
  Nicholas Farr
- Cooked motor
  Started by: jimmy b in: Manual machine tools
- 5
- 10
- 30 May 2025 at 16:17
  jimmy b
- Metric Build
  Started by: danieldlonsdale@gmail.com in: Traction engines
- 3
- 4
- 30 May 2025 at 10:39
  JasonB
- Drunk driver broke my workshop! 1 2
  Started by: stew 1 in: The Tea Room
- 15
- 31
- 30 May 2025 at 09:56
  John Haine
- Design Advice!- Warco GH600 Solid Topslide
  Started by: Richard Kirkman 1 in: Help and Assistance! (Offered or Wanted)
- 9
- 25
- 30 May 2025 at 08:58
  Richard Kirkman 1
- Stone mason query
  Started by: Plasma in: The Tea Room
- 3
- 7
- 30 May 2025 at 07:18
  Plasma
- Alligator v the 3-Bar Overhead Slidebar arrangement
  Started by: Greensands in: The Tea Room
- 2
- 2
- 29 May 2025 at 22:56
  duncan webster 1
- Boxford 280 Screwcutting Chart, Metric
  Started by: Nigel Bennett in: Manual machine tools
- 3
- 6
- 29 May 2025 at 21:39
  Mark Hall
- Proxxon PD400 vs HBM 180 lathe 1 2
  Started by: Sonic Escape in: The Tea Room
- 14
- 28
- 29 May 2025 at 21:01
  Andy Stopford
- Help me to identify and value lathes
  Started by: sammystox in: Workshop Tools and Tooling
- 8
- 10
- 29 May 2025 at 20:21
  Pete

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

View full reply list.

Latest Issue

June 2025

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies