Well I’m a machinist, so how do you make them? I just figured at a $1 each shim it wasn’t worth it, but it’s proving very difficult to actually get them
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Looking for suspension shims
- Thread starter Jaymod
- Start date
Well I’m a machinist, so how do you make them? I just figured at a $1 each shim it wasn’t worth it, but it’s proving very difficult to actually get them
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You're a machinist, that doesn't know how to make a shim?
I'm sorry, that does not compute. Could you explain how you got to be a "machinist" and never made a custom shim?
"Machine operator" maybe?
I make a stack of shim stock.
Clamp them between two flat pieces and drill a hole in the center
Mount the stack on an arbor, with the clamp pieces and do the outside diameter. you want to finalize the final diameter with a file or sandpaper as to not fold over the edge
Mount the stack in your custom jig that holds the stack in alignment by the outside diameter
Now do the inside diameter. Again finish the diameter in a way that doesn't fold over the edge, I use a ream.
The "trick" is to keep the stack compressed at ALL times so they stay aligned, and the more pressure you use the less likely it is the edges will fold over.
You will end up tossing the outside pieces of the stack as you can't keep them compressed, so if you want one shim you have to make five
When you're done go over the shims with a stone
...I'm not a machinist, I'm a hack that owns machine tools.
... but I know how to make shims... a VERY simple/basic necessity for a machinist... or a hack with machine tools.
MACHINISTS make shims all the time, it would be one of the first things you did as an apprentice... and, as a "machinist", HOW do you setups without making shims? At least half of my setups involve shims. (If you're a CNC jockey and someone else does your setups, you're a machine operator. I don't care what your employer's title for you is).
I'm sorry, that does not compute. Could you explain how you got to be a "machinist" and never made a custom shim?
"Machine operator" maybe?
I make a stack of shim stock.
Clamp them between two flat pieces and drill a hole in the center
Mount the stack on an arbor, with the clamp pieces and do the outside diameter. you want to finalize the final diameter with a file or sandpaper as to not fold over the edge
Mount the stack in your custom jig that holds the stack in alignment by the outside diameter
Now do the inside diameter. Again finish the diameter in a way that doesn't fold over the edge, I use a ream.
The "trick" is to keep the stack compressed at ALL times so they stay aligned, and the more pressure you use the less likely it is the edges will fold over.
You will end up tossing the outside pieces of the stack as you can't keep them compressed, so if you want one shim you have to make five
When you're done go over the shims with a stone
...I'm not a machinist, I'm a hack that owns machine tools.
... but I know how to make shims... a VERY simple/basic necessity for a machinist... or a hack with machine tools.
MACHINISTS make shims all the time, it would be one of the first things you did as an apprentice... and, as a "machinist", HOW do you setups without making shims? At least half of my setups involve shims. (If you're a CNC jockey and someone else does your setups, you're a machine operator. I don't care what your employer's title for you is).
Trials
Well-known member
If the forks were in bad shape, I would just fix them and put them back together with 5 weight and good seals and bushings and see where you need to go from there. That will give you a baseline. Rear shock I would totally take that to the scrap yard and find one that might work that features good adjustment and similar dimension, job done.
Sorry yah, I guess I’m not a machinist, I’m a fabricator that got pushed into the tool room to repair injection moulds, and found it so boring that I found a way back on the floor to help with maintenance, and build assembly machines.. have made a ton of shims, but they are always being clamped somehow so never needed to be perfect. The ones used in one of the moulds to control a tear away membrane( the pull out spout for 5gallon pails) is an off the shelf part and comes in .001” increments. So yah I’m a hack too with no formal training, but have full use of the tool room, and understand how to use the tools. When I need round shims I have made a punch set that I have added dies to get what I needed.
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The forks are fine, just want to make them better. The shock is not scrap, it just needed a new rod seal, but I replaced the wiper and the shaft bushing as well. This is just a bike that I poke around on with the family while they ride quads.. I just wanted to play with the valving, cause it looked like I could possibly have some fun learning how a shim stack works( reading is great, but I always learn better when I do it for real and feel the difference).
who knows maybe the boy will start racing MX, or doing trials.. it would be nice to be able to tune his suspension and know for sure I understand how it all works together.
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Trials
Well-known member
3 PQ riders came here today to play and we spent 40 minutes sorting out one fellas suspension, we couldn't figure out why he was riding so bad and then we tried his bike. We fixed the bike issues easy, he rode better, but I think he wants to sell his Sherco if anyone is interested :| he's too worried about getting hurt and is going to street bikes. it's a 2016
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