Making rubber bushings
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| − | First, order some urethane casting compound. [http://www.devcon.com/products/products.cfm?familyid=152 Devcon Flexane] is a good choice, or, a more generic, less-expensive product, such as [http://www.mcmaster.com/#8644k11/=3f24h0 part #8644K11 from McMaster Carr]. This can be used to repair seals, make molds to cast ceramics, etc. It comes in two parts; you mix the two together, and then pour them into your mold. They take 48 hours to dry, and there is no baking required. Because this compound only shrinks 0005" per inch of thickness, there is no need to worry about making your molds oversized. | + | {{youcanedit}}First, order some urethane casting compound. [http://www.devcon.com/products/products.cfm?familyid=152 Devcon Flexane] is a good choice, or, a more generic, less-expensive product, such as [http://www.mcmaster.com/#8644k11/=3f24h0 part #8644K11 from McMaster Carr]. This can be used to repair seals, make molds to cast ceramics, etc. It comes in two parts; you mix the two together, and then pour them into your mold. They take 48 hours to dry, and there is no baking required. Because this compound only shrinks 0005" per inch of thickness, there is no need to worry about making your molds oversized. |
Molds can be made out of steel tubing -- you can use the steel tubing that will be housing the bushings; that will ensure that the bushings are the correct diameter. Bases can be turned out of HDPE plastic, so the tubing presses into it, and then you can drill a hole in the base for some 3/4" nylon rod used as a center core to leave a hole for the bushing spacers. | Molds can be made out of steel tubing -- you can use the steel tubing that will be housing the bushings; that will ensure that the bushings are the correct diameter. Bases can be turned out of HDPE plastic, so the tubing presses into it, and then you can drill a hole in the base for some 3/4" nylon rod used as a center core to leave a hole for the bushing spacers. | ||
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