Collets ground or unhardened?

Collets ground or unhardened?

This topic has 4 replies, 3 voices, and was last updated 26 August 2019 at 12:51 by Chris TickTock.

Viewing 5 posts - 1 through 5 (of 5 total)

Author

Posts
26 August 2019 at 11:36 #426058
Chris TickTock
Participant
@christicktock
Hi I read somewhere someone had a collection of collets hardened and some unground. As a green horn when I buy something I generally assume it is ready for use. Are collets generally sold hardened ready for use and what is the virtue of buying unground collets?

Regards

Chris
Advert

26 August 2019 at 11:36 #9824
Chris TickTock
Participant
@christicktock
26 August 2019 at 11:57 #426062
SillyOldDuffer
Moderator
@sillyoldduffer
Most collets are hard and ready to go. I don't recognise "unground collets" as a thing, but you may mean "Emergency Collets". These are sold soft so you can drill out the centre to hold a non-standard size. Explanation here at ArcEuro.

Dave
26 August 2019 at 11:57 #426063
Anonymous
Collets are normally supplied hardened. However, some collets can be bought unhardened. These are often known as emergency collets. These collets are machined to fit the holder but the bore is left solid. This is so the user can machine the collet in situ to hold a special size or shape of work. The emergency collets may, or may not, be slit. The 5C emergency collets sold by Arc are slit and supplied with pins to hold the fingers apart during machining. On the other hand I have several emergency collets for my Pultra lathe where the nose is unmachined and the collet is unslit.

Chris: As an aside your post about WW collets implies you're in Cambridge? If so I'm close to Cambridge, out to the west, so youre welcome to visit and rabbit about machining. PM me if interested.

Andrew
26 August 2019 at 12:51 #426069
Chris TickTock
Participant
@christicktock
Thanks Guys I have been ferreting around there are apparently unhardened collets such as some 4 jaw brass and aluminium. Hardened and ground is how most machinists would buy quality collets. Hardened collets grip with a dependable force and being ground they sit in a concentric fashion.

Chris
Author

Posts

Viewing 5 posts - 1 through 5 (of 5 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
- Brian’s 1″ Minnie Traction Engine 1 2 … 13 14
  Started by: Brian Abbott in: Traction engines
- 38
- 338
- 21 May 2025 at 17:30
  Andy Stopford
- Tungsten Contact Points
  Started by: Durhambuilder in: I/C Engines
- 6
- 14
- 21 May 2025 at 17:09
  JasonB
- Stuart Twin Victoria (Princess Royal) Mill Engine 1 2 … 50 51
  Started by: Dr_GMJN in: Work In Progress and completed items
- 33
- 1,269
- 21 May 2025 at 15:53
  JasonB
- Building Bernard Tekippe’s Precision Regulator 1 2 3 4
  Started by: Chris Raynerd 2 in: Clocks and Scientific Instruments
- 14
- 94
- 21 May 2025 at 15:40
  Dave S
- Sandvik Coromant 20mm hand-scraper
  Started by: flatline in: Workshop Tools and Tooling
- 5
- 10
- 21 May 2025 at 15:20
  Mark Easingwood
- New Warco D330 – Some Advice Please
  Started by: Mark Slatter in: Manual machine tools
- 13
- 17
- 21 May 2025 at 15:01
  KEITH BEAUMONT
- Suitable fuel for boll aero engine
  Started by: half whit in: I/C Engines
- 7
- 12
- 21 May 2025 at 14:55
  KEITH BEAUMONT
- Aliphatic glue removal/separation
  Started by: Mike Joseph in: Model Boats
- 3
- 3
- 21 May 2025 at 14:09
  Colin Bishop
- Colchester Chipmaster Clutch question
  Started by: Peter_H in: Manual machine tools
- 1
- 1
- 21 May 2025 at 14:01
  Peter_H
- Not unexpected, but is it predictable ? 1 2
  Started by: Michael Gilligan in: 3D Printers and 3D Printing
- 9
- 32
- 21 May 2025 at 13:59
  Andrew Entwistle
- Is content in ME&W being written by AI?
  Started by: norm norton in: Model Engineer & Workshop
- 2
- 2
- 21 May 2025 at 13:38
  JasonB
- CNC Coolant
  Started by: Steve355 in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 8
- 25
- 21 May 2025 at 13:24
  JasonB
- Help and advice please
  Started by: acklam65 in: Beginners questions
- 5
- 8
- 21 May 2025 at 11:31
  Nicholas Farr
- Printed ME&W not arriving (overseas).
  Started by: michael rietveld in: Model Engineer & Workshop
- 3
- 3
- 21 May 2025 at 10:23
  simondavies3
- What Did You Do Today 2025 1 2 … 4 5
  Started by: JasonB in: The Tea Room
- 28
- 116
- 21 May 2025 at 10:14
  Bazyle
- Clockmakers Depthing Tool
  Started by: David Carne in: Clocks and Scientific Instruments
- 10
- 15
- 21 May 2025 at 10:04
  Matt Harrington
- ML7 Topslide limitations 1 2
  Started by: Mike Poole in: Manual machine tools
- 14
- 27
- 20 May 2025 at 22:58
  Michael Gilligan
- making a 3″ saw-blade clamping washer with a tapered thickness
  Started by: milesincam in: Workshop Tools and Tooling
- 11
- 19
- 20 May 2025 at 22:34
  John Haine
- Not another one
  Started by: Dell in: Manual machine tools
- 2
- 2
- 20 May 2025 at 21:57
  Michael Gilligan
- Countersinking carbon fibre sheet with my Sieg CNC Mill
  Started by: Sarah F in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 7
- 17
- 20 May 2025 at 20:44
  Neil Lickfold
- The June copy of ME&W has not arrived.
  Started by: Andrew Tinsley in: General Questions
- 2
- 3
- 20 May 2025 at 18:58
  Andrew Tinsley
- Boxford Cud or ML7
  Started by: Trevor Howley in: General Questions
- 14
- 21
- 20 May 2025 at 18:05
  Bazyle
- Motorised Adept No. 2 Shaper
  Started by: William Ayerst in: Workshop Tools and Tooling
- 6
- 11
- 20 May 2025 at 10:47
  William Ayerst
- Intro – a Cambridge hobbyist
  Started by: milesincam in: Introduce Yourself – New members start here!
- 9
- 15
- 20 May 2025 at 10:05
  Julie Ann
- What is Hobbymat MD65 RAL colour?
  Started by: stew 1 in: Workshop Tools and Tooling
- 5
- 7
- 20 May 2025 at 09:59
  stew 1

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