This is the leadscrew from the eShapeoko kit. It is stainless steel, threaded Tr 8 x 2 ("metric acme"), 175 mm long. One end is turned down to 5 mm diameter for a length of 5 mm, the other is simply chamfered. (The 5 mm section is for a future option, where it will be supported by a bearing; it is not used in the current eShapeoko design.)
The leadscrew is compatible with our Tr 8 x 2 lead nut.
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Thread: Tr 8 x 2
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Major (outer) diameter: 8 mm
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Lead: 2 mm
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Pitch: 2 mm
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Number of starts: 1
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Overall length: 175 mm
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End A machining: 5 mm long, 5 mm diameter, edges chamfered
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End B machining: chamfered
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Thread length: 170 mm (less chamfer at ends)