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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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SS shims
I need to make some donut shaped shims.
Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. Last ones I made where from brass. I sandwiched the sheet between 2 boards and drilled the center hole. Then I used snips for the O.D. They were not pretty, but functional. I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe. What's a good way to put the hole in and cut the OD in a way that would look decent? Wayne D. |
#2
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SS shims
"Wayne" wrote in message
... I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. Last ones I made where from brass. I sandwiched the sheet between 2 boards and drilled the center hole. Then I used snips for the O.D. They were not pretty, but functional. I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe. What's a good way to put the hole in and cut the OD in a way that would look decent? Wayne D. Epoxy it to a sacrificial block, machine to size and shape, remove from block with heat. |
#3
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SS shims
Bob La Londe wrote:
"Wayne" wrote in message ... I need to make some donut shaped shims. Epoxy it to a sacrificial block, machine to size and shape, remove from block with heat. What Bob said, except use Super-Glue cyanoacrylate. Epoxy doesn't stick to steel nearly as well. Start with an aluminum backing plate the same X and Y size as your shim stock blanks. Clean and degrease shimstock and backing plate, interleave layers of copier paper between each piece of shim, all glued up with Super-glue. A 4 layer sandwich will give you 4 shims per operation. Use a thick aluminum sheet to clamp the sandwich to cure each lamination flat. HINT! Before gluing, exhale to fog the shim. The condensed water really speeds up the curing process. Adjust the direction of mill cutter travel clockwise on the ID and counterclockwise on the OD so that the ragged edge appears on the scrap material rather than your top workpiece. A propane torch on the backing plate will cause the shims to release from the backing plate. Use Lots Of Ventilation! Promptly blow out the flame produced by burning superglue. They turn out very nicely. Use a random orbit sander to clean off charring on the back of the top most shim, should it appear. --Winston |
#4
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SS shims
On Sun, 17 Jan 2010 20:32:42 -0600, Wayne wrote:
I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. .... I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe .... Besides SS shim stock, McMaster also has SS shim washers, like at http://www.mcmaster.com/#stainless-steel-shim-washers/=5f8nkc, 74 or 72 cents each for .012 or .015 thick, 3/8" ID, 5/8" OD. I don't see much of a match at McMaster for your other size, but you could have a look at suppliers of metric shim washers. -- jiw |
#5
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SS shims
On Sun, 17 Jan 2010 20:32:42 -0600, Wayne
wrote: I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. Last ones I made where from brass. I sandwiched the sheet between 2 boards and drilled the center hole. Then I used snips for the O.D. They were not pretty, but functional. I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe. What's a good way to put the hole in and cut the OD in a way that would look decent? Wayne D. Given the thickness of the material and the few that you need, it may be possible to chemical or electro-chemical mill these at home. What sort of accuracy do you need on the ID/OD and is some slight undercut on the edges OK? Resist, etchant and possibly a battery charger are all pretty cheap. It may be possible to get one of the sheet plastic lettering machines [like a plotter but with a knife to cut the plastic sheet] to produce your "donut" resists in some sort of stick on plastic. Or if you have a steady hand just paint the resist on with a fine brush. see http://www.cricut.com/default.aspx?A...ookieSupport=1 http://medicaldesign.com/contract-ma..._milling_0309/ http://www.metallographic.com/Etchants/Etchants.htm http://www.finishing.com/108/82.shtml Unka George (George McDuffee) ............................... The past is a foreign country; they do things differently there. L. P. Hartley (1895-1972), British author. The Go-Between, Prologue (1953). |
#6
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SS shims
On Mon, 18 Jan 2010 06:06:40 +0000 (UTC), James Waldby wrote:
On Sun, 17 Jan 2010 20:32:42 -0600, Wayne wrote: I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. ... I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe ... Besides SS shim stock, McMaster also has SS shim washers, like at http://www.mcmaster.com/#stainless-steel-shim-washers/=5f8nkc, 74 or 72 cents each for .012 or .015 thick, 3/8" ID, 5/8" OD. I don't see much of a match at McMaster for your other size, but you could have a look at suppliers of metric shim washers. Nobody has shim stock anymore?? Gunner "I am for doing good to the poor, but I differ in opinion of the means. I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. In my youth I travelled much, and I observed in different countries, that the more public provisions were made for the poor the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer." -- Benjamin Franklin, /The Encouragement of Idleness/, 1766 |
#7
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SS shims
Wayne,
I have a sheet of peelable SS shim stock. It peels in .002" sheets. It comes as a .035" sheet. I make a cutting die on a lathe and a 60 ton hydraulic press. You would not need 60 tons. I would guess ten tons is fine. Steve "Wayne" wrote in message ... I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. Last ones I made where from brass. I sandwiched the sheet between 2 boards and drilled the center hole. Then I used snips for the O.D. They were not pretty, but functional. I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe. What's a good way to put the hole in and cut the OD in a way that would look decent? Wayne D. |
#8
Posted to rec.crafts.metalworking
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SS shims
F. George McDuffee laid this down on his screen :
On Sun, 17 Jan 2010 20:32:42 -0600, Wayne wrote: I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. Last ones I made where from brass. I sandwiched the sheet between 2 boards and drilled the center hole. Then I used snips for the O.D. They were not pretty, but functional. I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe. What's a good way to put the hole in and cut the OD in a way that would look decent? Wayne D. Given the thickness of the material and the few that you need, it may be possible to chemical or electro-chemical mill these at home. What sort of accuracy do you need on the ID/OD and is some slight undercut on the edges OK? Resist, etchant and possibly a battery charger are all pretty cheap. It may be possible to get one of the sheet plastic lettering machines [like a plotter but with a knife to cut the plastic sheet] to produce your "donut" resists in some sort of stick on plastic. Or if you have a steady hand just paint the resist on with a fine brush. see http://www.cricut.com/default.aspx?A...ookieSupport=1 http://medicaldesign.com/contract-ma..._milling_0309/ http://www.metallographic.com/Etchants/Etchants.htm http://www.finishing.com/108/82.shtml Unka George (George McDuffee) .............................. The past is a foreign country; they do things differently there. L. P. Hartley (1895-1972), British author. The Go-Between, Prologue (1953). Don't need any special accuracy. I think I'd like to stay away from chemicals though. Wayne D. |
#9
Posted to rec.crafts.metalworking
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SS shims
Winston pretended :
Bob La Londe wrote: "Wayne" wrote in message ... I need to make some donut shaped shims. Epoxy it to a sacrificial block, machine to size and shape, remove from block with heat. What Bob said, except use Super-Glue cyanoacrylate. Epoxy doesn't stick to steel nearly as well. Start with an aluminum backing plate the same X and Y size as your shim stock blanks. Clean and degrease shimstock and backing plate, interleave layers of copier paper between each piece of shim, all glued up with Super-glue. A 4 layer sandwich will give you 4 shims per operation. Use a thick aluminum sheet to clamp the sandwich to cure each lamination flat. HINT! Before gluing, exhale to fog the shim. The condensed water really speeds up the curing process. Adjust the direction of mill cutter travel clockwise on the ID and counterclockwise on the OD so that the ragged edge appears on the scrap material rather than your top workpiece. A propane torch on the backing plate will cause the shims to release from the backing plate. Use Lots Of Ventilation! Promptly blow out the flame produced by burning superglue. They turn out very nicely. Use a random orbit sander to clean off charring on the back of the top most shim, should it appear. --Winston What kind of cutter are we talking about here? I've mostly have used end mills, or occasionally a counterbore. Wayne D. |
#10
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SS shims
Got no press. Best I can do is a bench vise, mill vise, or BFH.
Wayne D. Steve Lusardi wrote on 1/18/2010 : Wayne, I have a sheet of peelable SS shim stock. It peels in .002" sheets. It comes as a .035" sheet. I make a cutting die on a lathe and a 60 ton hydraulic press. You would not need 60 tons. I would guess ten tons is fine. Steve "Wayne" wrote in message ... I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. Last ones I made where from brass. I sandwiched the sheet between 2 boards and drilled the center hole. Then I used snips for the O.D. They were not pretty, but functional. I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe. What's a good way to put the hole in and cut the OD in a way that would look decent? Wayne D. |
#11
Posted to rec.crafts.metalworking
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SS shims
James Waldby laid this down on his screen :
On Sun, 17 Jan 2010 20:32:42 -0600, Wayne wrote: I need to make some donut shaped shims. Thinnest is .012, largest .015. One shim has a 10 mm I.D. and 17.5 mm O.D. The other 15 mm I.D. and 33.5 mm O.D. I only need a few of each. ... I'd like to make some out of SS this time, for more durability and rust resistance. I haven't worked with SS. McMaster has type 302 in an assortment pack. I have no punches and would be too expensive for a couple shims. Got a mill and lathe ... Besides SS shim stock, McMaster also has SS shim washers, like at http://www.mcmaster.com/#stainless-steel-shim-washers/=5f8nkc, 74 or 72 cents each for .012 or .015 thick, 3/8" ID, 5/8" OD. I don't see much of a match at McMaster for your other size, but you could have a look at suppliers of metric shim washers. I might as well make my own. That way I'll have shim stock leftover if needed for something else. Got the shim stock in today. I just love next day delivery from McMaster. Wayne D. |
#12
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SS shims
Wayne wrote:
Winston pretended : Bob La Londe wrote: "Wayne" wrote in message ... I need to make some donut shaped shims. Epoxy it to a sacrificial block, machine to size and shape, remove from block with heat. What Bob said, except use Super-Glue cyanoacrylate. Epoxy doesn't stick to steel nearly as well. Start with an aluminum backing plate the same X and Y size as your shim stock blanks. Clean and degrease shimstock and backing plate, interleave layers of copier paper between each piece of shim, all glued up with Super-glue. A 4 layer sandwich will give you 4 shims per operation. Use a thick aluminum sheet to clamp the sandwich to cure each lamination flat. HINT! Before gluing, exhale to fog the shim. The condensed water really speeds up the curing process. Adjust the direction of mill cutter travel clockwise on the ID and counterclockwise on the OD so that the ragged edge appears on the scrap material rather than your top workpiece. A propane torch on the backing plate will cause the shims to release from the backing plate. Use Lots Of Ventilation! Promptly blow out the flame produced by burning superglue. They turn out very nicely. Use a random orbit sander to clean off charring on the back of the top most shim, should it appear. --Winston What kind of cutter are we talking about here? I've mostly have used end mills, or occasionally a counterbore. End mill. I used a 1/8" 4 flute center - cutting type. Lots of superglue; saturate the paper or coolant will cause delamination. Use coolant or the end mill will melt the super glue and bind in the slot. Cut SS aggressively to stay under the work - hardened area. --Winston |
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