Author Topic: EW 350 front brake spring box  (Read 3761 times)

0 Members and 1 Guest are viewing this topic.

Offline watchpaintdry

  • Member
  • *
  • Join Date: Jul 2014
  • Posts: 11
  • Location: new zealand
EW 350 front brake spring box
« on: 22 Apr 2016 at 09:04 »
Hi, has anyone got pictures and/or sizes of the spring box assembly for an EW350?

Offline shuswapkev

  • Senior Member
  • ***
  • Join Date: Mar 2014
  • Posts: 173
  • Location: gold coast
Re: EW 350 front brake spring box
« Reply #1 on: 22 Apr 2016 at 09:52 »


  whats a spring box??

Offline watchpaintdry

  • Member
  • *
  • Join Date: Jul 2014
  • Posts: 11
  • Location: new zealand
Re: EW 350 front brake spring box
« Reply #2 on: 24 Apr 2016 at 00:32 »
It sits on the front forks and acts as a return for the front brake

Offline Daren W Australia

  • Master Member
  • ****
  • Join Date: Apr 2005
  • Posts: 569
  • Location: Sydney Australia
Re: EW 350 front brake spring box
« Reply #3 on: 24 Apr 2016 at 06:08 »
Hi this was on ebay Daren
too many dougli not enough time!

Offline oily bloke

  • Senior Member
  • ***
  • Join Date: Mar 2009
  • Posts: 219
  • Location: Surrey. UK
Re: EW 350 front brake spring box
« Reply #4 on: 24 Apr 2016 at 08:34 »
I think you mean the part which is the transition from brake cable to rod halfway up the fork. A sleeve /spring assy?

Offline watchpaintdry

  • Member
  • *
  • Join Date: Jul 2014
  • Posts: 11
  • Location: new zealand
Re: EW 350 front brake spring box
« Reply #5 on: 24 Apr 2016 at 20:44 »
Yes thats right.whats the length of the rod from tip to tip as I am going to have to make that too

Offline shuswapkev

  • Senior Member
  • ***
  • Join Date: Mar 2014
  • Posts: 173
  • Location: gold coast
Re: EW 350 front brake spring box
« Reply #6 on: 02 May 2016 at 13:12 »

  I,d like to get some sizes as well..is ther any more parts to that item?? 
I,m going to have to make one

Offline Chris

  • Master Member
  • ****
  • Join Date: Jun 2004
  • Posts: 507
  • Location: Kent, UK.
Re: EW 350 front brake spring box
« Reply #7 on: 09 Jul 2016 at 07:50 »
Hi All
     In response to the question above I have prepared a sketch of a typical spring box set of components. These were fited to most Douglas models between 1924 and 1939. I have four machines with spring boxes and they all differ very slightly in detail so I cannot claim originality for any of them . The sketch attached is not fully dimensioned but there is sufficient information to enable understanding of the function and to manufacture a working set of parts. A rear brake spring from several BSA models has been recommended for some time as exactly what is required inside the spring box. This spring should be a nice easy fit inside the spring box body and the diameter of the adaptor where the cable is anchored should be a nice easy fit inside the spring . The lower stepped part of the adaptor should also be a sliding fit inside the body . The nipple should be a good fit inside the bore of the adaptor and the width of the slot in the adaptor and the bore of the upper knurled adjuster a loose fit for the diameter of the Bowden cable inner used. The knurling of the adjuster and its locking ring is straight on some examples and diamond on others. Your choice. Chris.
« Last Edit: 09 Jul 2016 at 15:53 by Chris »

Offline shuswapkev

  • Senior Member
  • ***
  • Join Date: Mar 2014
  • Posts: 173
  • Location: gold coast
Re: EW 350 front brake spring box
« Reply #8 on: 09 Jul 2016 at 13:35 »
chris
    thanks heaps
  that drawing is a tremendous help
   greatly appreciated

   I get my springs from the local building supply....they have a great range

 

motorcycle