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| How to manufacture shim washers ? |
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| Bluechip:
--- Quote from: picclock on July 25, 2012, 06:59:02 PM ---@ Bluechip Sir :bow: I had no idea these were available. I have wasted hours on these so I think I shall kick myself. Will order both of the sizes I need. Many many thanks Best Regards picclock --- End quote --- They are available, just not thick on the ground anymore. When I were a nipper, I was often despatched on the works bike to the local Engineering Sundries Supplier for such parts. It seemed you could take any obscure bit of metal you'd tortured into oblivion and get a replacement. Not today though. Another time, another world. :( BC |
| rotorhead:
Hi All, I had a need for some 3mm ID x 10mm OD x 0.005" brass shim washers a while ago, to personalise a centralising gauge. So I used a few earlier prepared items, and produced some punch and die sets, I can only find the assembled frame photos, but it gives an idea. The top was just whacked with a smallish hammer, but a decent sized pillar drill would do. |
| Lew_Merrick_PE:
Pic -- It sounds as if you are making these in (something resembling) quantity and doing it repeatedly. ??? 1) A steel sandwich plate works better than aluminum for steel parts. That will give you better control and edge finish for boring the ID. I find that a dedicated clamp made up of a baseplate and a clamp plate retained by high-strength screws works better than cantilevered clamp screws for compressing things. Insert fresh sacrificial spacers either side of the washer stack to get the best edge finish after the first usage (and drill out the hole in the base and clamp plate so they don't impact your drilling after the first usage). 2) If you have a lathe, it would be better to make an arbor that will hold the parts sandwiched between an (spindle-side) shoulder and a threaded clamping nut. The shoulder and clamping nut should be just slightly (call it .010 inch or 0.25 mm -- roughly) smaller than your desired OD. I will also admit to having made up such an arbor, mounting it in appropriate collet on my mill, and clamping a turning tool in my vise to turn such parts. ??? |
| picclock:
@ rotorhead (rc helicopters ??) I think if I was making them in brass I would just have used a pair of scissors for the outside and drilled the inside with them sandwiched as I said before. I like the punch idea but I think it would need to be hardened to use with steel and the punch alignment could be tricky. @ Lew These are to go next to bearings to give a running clearance for the parts involved. I need about 7 with 10mm ID and 6 with 8mm ID. They also ensure the correct mesh spacing of some bevel gears, so maybe more maybe less. I have ordered some from Caleb components, also in additional sizes, as bluechip suggested, but they have yet to arrive. I think they will make a handy addition to my 'stock'. Now I know about this supplier I can't imagine that I will ever want to attempt to make them again. Best Regards picclock |
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