Tumbler back gear

This topic has 3 replies, 3 voices, and was last updated 18 July 2018 at 20:30 by David George 1.

Viewing 4 posts - 1 through 4 (of 4 total)

Author

Posts
18 July 2018 at 16:37 #362846
james short
Participant
@jamesshort53745
Hi thanks for the info on back gears for drummond M type lathe 3 1/2 inch lathe , Is it possible to fit a tumbler reverse to my lathe and what does it do. ? On the gear cover there is a cover plate which seems to suggest that you can fit one, I have a tumbler reverse from a ML7 ,can this be made to fit kind regards
Advert

18 July 2018 at 16:37 #9261
james short
Participant
@jamesshort53745
can one be fitted
18 July 2018 at 17:38 #362857
Bazyle
Participant
@bazyle
The tumbler reverse is for reversing the leadscrew relative to the direction of the chuck, and also for disconnecting the feed on lathes that don't have the clutch that a Drummond has. This allows feeds away from the chuck and left hand threads. Neither of these is required all that often so it is not an essential item and can also be achieved by putting an extra gear in the gear train, just a bit slow for those always in a rush. A slight advantage of using it for disconnecting the feed as its position means the gear train is also not turning needlessly which is quieter.

It would be possible to use the Myford one but it probably has different pitch gears. This is not uncommon on TRs but you then have to arrange extra gears to suit.
18 July 2018 at 20:30 #362879
David George 1
Participant
@davidgeorge1
Hi James the tumbler reverse on an M type just reverses the leadscrew and I have not found a real use as Bazyle says if you want to reverse the screw cutting just put another gear in the train. You can get the drawings on the Yahoo Drummond web site but I wouldn't bother.

David
Author

Posts

Viewing 4 posts - 1 through 4 (of 4 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.

Advert

Latest Replies

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

- Topic
- Voices
- Posts
- Last Post
- AVG;BEWARE!
  Started by: Howard Lewis in: The Tea Room
- 3
- 3
- 30 July 2026 at 08:12
  Charles Lamont
- Why righthand threads? 1 2
  Started by: vintagengineer in: General Questions
- 21
- 31
- 30 July 2026 at 00:36
  not done it yet
- Mysterious Morse Tapers
  Started by: Pippin in: Workshop Tools and Tooling
- 11
- 21
- 29 July 2026 at 22:51
  Pippin
- Is anyone interested in developping a new series of model engines? 1 2 3 4
  Started by: paulmichael1084 in: General Questions
- 20
- 98
- 29 July 2026 at 22:38
  duncan webster 1
- A new Milling Machine
  Started by: Martin Johnson 1 in: Workshop Tools and Tooling
- 7
- 10
- 29 July 2026 at 18:57
  Vic
- Hello from EastAnglia
  Started by: 1southdrive in: Introduce Yourself – New members start here!
- 6
- 6
- 29 July 2026 at 13:08
  Howard Lewis
- All things Beaver Mill 1 2 … 9 10
  Started by: Robert James 3 in: Manual machine tools
- 43
- 235
- 29 July 2026 at 09:56
  Lex Davis
- Sealed Lead-Acid Battery
  Started by: Michael Gilligan in: Electronics in the Workshop
- 5
- 19
- 29 July 2026 at 00:14
  Michael Gilligan
- It’s A Compressor, Jim, But Not… 1 2
  Started by: Nigel Graham 2 in: General Questions
- 15
- 48
- 28 July 2026 at 23:26
  Nigel Graham 2
- blackgates eng 1 2
  Started by: Peter Daw in: Beginners questions
- 22
- 38
- 28 July 2026 at 22:39
  Stuart Smith 5
- Basic(?) Milling question
  Started by: paulmichael1084 in: Beginners questions
- 10
- 16
- 28 July 2026 at 21:15
  Julie Ann
- REXON SS16A scroll saw
  Started by: Michael Gilligan in: Workshop Tools and Tooling
- 4
- 9
- 28 July 2026 at 16:58
  Michael Gilligan
- Boiler explosion on Guadeloupe.
  Started by: howardb in: The Tea Room
- 6
- 10
- 28 July 2026 at 13:17
  JasonB
- Garden water pump
  Started by: John MC in: The Tea Room
- 12
- 22
- 28 July 2026 at 09:42
  noel shelley
- Latest new addon for FreeCAD!!
  Started by: Russell Eberhardt in: CAD – Technical drawing & design
- 2
- 5
- 28 July 2026 at 08:51
  Russell Eberhardt
- Silver Soldering
  Started by: Jss in: General Questions
- 11
- 18
- 27 July 2026 at 23:36
  duncan webster 1
- Bengs kits
  Started by: paul1956 in: Beginners questions
- 5
- 8
- 27 July 2026 at 17:37
  duncan webster 1
- New motor for a Myford super 7
  Started by: Hollowpoint in: Electronics in the Workshop
- 12
- 16
- 27 July 2026 at 17:29
  john fletcher 1
- chester conquest pcb board connections
  Started by: In Wilson in: Introduce Yourself – New members start here!
- 6
- 15
- 27 July 2026 at 13:35
  Hugh Stewart-Smith 1
- Peat-Shaped [ ref. Verdict DTI ]
  Started by: Michael Gilligan in: Workshop Tools and Tooling
- 1
- 1
- 27 July 2026 at 12:40
  Michael Gilligan
- Plug in Solar 1 2 3 4
  Started by: Vic in: The Tea Room
- 28
- 94
- 27 July 2026 at 09:27
  not done it yet
- Super Simplex Build
  Started by: Peter Hoerlein in: Work In Progress and completed items
- 7
- 19
- 27 July 2026 at 06:29
  Peter Hoerlein
- Hobbing a Brass or Aluminium Drive Pulley to Stop Belt Slippage
  Started by: Blue Heeler in: Hints And Tips for model engineers
- 7
- 15
- 27 July 2026 at 00:45
  Blue Heeler
- Long awaited FreeCAD version 1.1 released
  Started by: Russell Eberhardt in: CAD – Technical drawing & design
- 3
- 9
- 26 July 2026 at 15:36
  Russell Eberhardt
- Looking for detailed build logs to help decide next project
  Started by: GrahamS in: Stationary engines
- 4
- 8
- 26 July 2026 at 10:57
  GrahamS

Tumbler back gear

Tumbler back gear

Latest Replies

Latest Issue

August 2026

Newsletter Sign-up

Latest Replies