Author Topic: KEA108 substitute steel or source of 108  (Read 2294 times)

Offline raynerd

  • Madmodder Committee
  • Hero Member
  • *****
  • Posts: 2853
  • Country: gb
    • Raynerds Projects - Raynerd.co.uk
KEA108 substitute steel or source of 108
« on: June 08, 2014, 04:23:10 AM »
In a number of my Clock books it references KEA108 as an excellent material for cutting clock pinions. I believe that it was really nice and free cutting yet could be hardened due to its high carbon content. Does anyone know what would be the nearest replacement to kea108. My understanding was that is was banned due to selenium content.

Apparently 01 tool steel is not a good substitute. Would en24t be the nearest?

Anyone by any chance machines with these steels and could give a comparison? Remembering that wi tiny pinions your trying to fly cut tiny teeth so the more free cutting the better! I tried "silver steel" last time and got quite a bit of chatter. Of course that could have been my setup but thought I'd ask for future to see what other options I had.
Youtube: craynerd
Projects at - www.raynerd.co.uk

Offline ticker

  • Jr. Member
  • **
  • Posts: 5
Re: KEA108 substitute steel or source of 108
« Reply #1 on: June 26, 2014, 06:23:44 AM »
Take a look at Thorntons, they and many other manufacturers of clock pinions advise using EN8 or EN9 steel.  EN8DM is a free cutting version of EN8 which is a medium carbon steel and can be heat treated.

http://www.ppthornton.com/pdf/ppthornton_brochure_2012.pdf
http://kvsteel.co.uk/steel/EN8.html

Offline RodW

  • Full Member
  • ***
  • Posts: 109
  • Country: au
    • Vehicle Modifications Network
Re: KEA108 substitute steel or source of 108
« Reply #2 on: June 26, 2014, 06:56:13 AM »
This document has the cross references you need.

http://keiusa.com/wp-content/uploads/2013/01/Cross-Reference-of-Steel-Standards.pdf

It says EN8 equivalent is 1040 or 1045.

Try these guys in the UK.

http://www.bohler-uddeholm.co.uk/

In Australia where I use this supplier, 1045 is one of their stock lines. You might end up with enough material to make  lot of clocks though!
RodW
Brisbane, Australia

Offline ticker

  • Jr. Member
  • **
  • Posts: 5
Re: KEA108 substitute steel or source of 108
« Reply #3 on: June 26, 2014, 07:23:33 AM »
This document has the cross references you need.

http://keiusa.com/wp-content/uploads/2013/01/Cross-Reference-of-Steel-Standards.pdf

It says EN8 equivalent is 1040 or 1045.

Try these guys in the UK.

http://www.bohler-uddeholm.co.uk/

In Australia where I use this supplier, 1045 is one of their stock lines. You might end up with enough material to make  lot of clocks though!

Were does this document show the cross ref. for KEA 108 which is what the OP is asking about

Offline RodW

  • Full Member
  • ***
  • Posts: 109
  • Country: au
    • Vehicle Modifications Network
Re: KEA108 substitute steel or source of 108
« Reply #4 on: June 26, 2014, 07:35:52 AM »

Were does this document show the cross ref. for KEA 108 which is what the OP is asking about

The Thorntons document says EN8 or EN9 is preferred for clocks (bottom right of P2). I'm not right up on all these steel numbers but from what I understand a lot of them are obsolete standards. 1040 and 1045 are current ones. I think we Aussies have been more forceful in adopting the new standards than a lot of other countries. I think that comes from the fact we developed the best adoption strategy of metric units of any country so the thinking has flowed on to engineering standards.
RodW
Brisbane, Australia

Offline chipenter

  • Hero Member
  • *****
  • Posts: 763
  • Country: gb
Re: KEA108 substitute steel or source of 108
« Reply #5 on: June 26, 2014, 11:11:05 AM »
EN8DM steel is freecutting http://www.johnwardle.co.uk/standard-cut-pinions-2-c.asp , I have used silver steel got to go slow and gentle and be ridgid  , it dosn't like to be rushed .
Jeff