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Cam Ball Race Pair for a Load Cell Zero Check
Two grooved rings that sit on top of Ruge's load cell. Turning the upper one rides its balls up shallow cam ramps and lifts the load a few thousandths of an inch, so the zero can be read without moving the tank.
中级
A few hours
说明
1
1
Watch: boring a hole on a lathe
Watch: boring a hole on a lathe
Boring a hole step by step on a metal lathe.
2
2
Turn two rings
Turn two rings
Turn and bore two rings from round bar: the lower to sit on the shell, the upper with a centre opening larger than the piston top.
此步骤所需材料：
低碳钢圆棒1 个所需工具：
钢锯
金属车床
镗杆
切削油3
3
Groove the races
Groove the races
Turn a ball groove in the facing sides, and one in the top of the upper ring for the second row of balls.
所需工具：
金属车床
游标卡尺4
4
File the cam ramps and bar holes
File the cam ramps and bar holes
File the lower groove into very slight ramps, one per ball. Drill a row of recesses round the upper ring's edge for a turning bar.
所需工具：
锉刀套装
台钻
台虎钳5
5
Limits
Limits
Ruge's patent gives the part's shape and job but no material or size. Mild steel and silver-solder brazing are our choice; size it to the load you need. Lathe method after Palmateer, Elementary Machine Shop Practice (1918).
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