I'm looking to get a plunger piston for a coil fork, copied - and the length customised. Basically, PUSH don't do a 180mm ACS-3 conversion and 180 is what I need for my new frame. I've measured up the solid height of the spring, so it should work.
Any idea on who I should go to and how much it's going to cost me?
Do you have a drawing?
Where are you?
I can do it, cost is completely dependent on what is involved in making it, so could be £20 if it's a simple spacer type piston to anything a one off item. Does it have any bearing surfaces, bushes, seals etc.
Also are you 100% sure that the spring isn't going to go coil bound at fully compresed because it will be a full metal on metal bottom out and likely to damaged things.
I'll respond in more detail this evening when I have more time, i used the calculation for closed and ground springs (N-0.75)*average diameter of the wire - and came up with 188mm before the coil bound.
With the ACS-3 you can never quite fully bottom it out anyway because of the air bump stop that has a tiny main chamber volume.
Cheers chaos 🙂 that was a nice response.
I'm based in London and Sheffield.
I'll strip the fork this weekend - I'm hoping the black nut looking thing on the piston, just before you get to the blue nut - is actually a nut and comes off - if it does, this should be simple yes? If not, I could send you the part out to copy?
How did you get on with working out what you want? I couldn't figure out how to find this thread again...