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Сабвэй надо мною...
Mar. 11th, 2012 07:24 pm
Ньютрик в районе где-то 70-х в солнечный день. Очень неприятно ездить, как в большом стробоскопе.
Mar. 11th, 2012
Ньютрик в районе где-то 70-х в солнечный день. Очень неприятно ездить, как в большом стробоскопе.
Brent: shims.
Mar. 11th, 2012 07:34 pmThere are shims, and there are washers. Both separate two surfaces BUT: wahers just separate, shims separate them on precise distance. So how do I do it?
First I select a piece of brass with thickness slightly more than required. Don't know what's required? Take well overthickened, more is not less.
In my case it some kind of end cap for brass duct or pipe, go figure. Found it in Home Depote. Hey, brass is brass, there's no science fiction here. I took 2 wooden planks and restrain brass piece between, then drilled holes with exact diameter of blade axle:
If you will not encase thin brass between the wood, the hole will be of a rough shape, never perfectly round due to wiggle.
Then I used Corel Draw to make an imprint of two circles exactly 11mm with center marked. Cut them off paper, glued to the brass, using light from the bulb as a guide:
Then I took a jeweler saw and cut these suckers off:
After that I used my jig to hold them securely on the lathe while Dremel was sanding it down to the precise 11mm:
As a result I got the best shims I made to date, slightly overwheight, but hey! Diamond lapping plate will make a short work on this problem.
NOW: the thickening of the whole project, that's why I needed the shims. Everything must be in parallel to eachother with allowance of hundreds of a millimeter, or the blade will have funny feeling while opening or closing.
First I select a piece of brass with thickness slightly more than required. Don't know what's required? Take well overthickened, more is not less.
In my case it some kind of end cap for brass duct or pipe, go figure. Found it in Home Depote. Hey, brass is brass, there's no science fiction here. I took 2 wooden planks and restrain brass piece between, then drilled holes with exact diameter of blade axle:
If you will not encase thin brass between the wood, the hole will be of a rough shape, never perfectly round due to wiggle.
Then I used Corel Draw to make an imprint of two circles exactly 11mm with center marked. Cut them off paper, glued to the brass, using light from the bulb as a guide:
Then I took a jeweler saw and cut these suckers off:
After that I used my jig to hold them securely on the lathe while Dremel was sanding it down to the precise 11mm:
As a result I got the best shims I made to date, slightly overwheight, but hey! Diamond lapping plate will make a short work on this problem.
NOW: the thickening of the whole project, that's why I needed the shims. Everything must be in parallel to eachother with allowance of hundreds of a millimeter, or the blade will have funny feeling while opening or closing.
