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Home Workshop > Members > Forum > Projects Area > Millers > Driving a horizontal head from a vertical mill

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Driving a horizontal head from a vertical mill

Driving a horizontal head from a vertical mill

I recently acquired a Richmond universal mill, complete with vertical head attachment. Unfortunately the vertical head has issues: Firstly the internal fitting was too large for the register on the face of the mill, implying it didn't originally come with this machine; I've cured that by making a spacer ring pressed into the head. Secondly the drive shaft had sheared at the point of entry to the input of the head and only the small piece in the head left, so I've no idea what the original fixing to the horizontal drive was like. I imagine this fault occurred because of shaft misalignment caused by the ill-fitting register. The drive end is 40 INT, so simple enough to adapt a 40 INT arbour to suit the job, but it occurs to me that there is always scope for misalignment, however slight and it should also be entirely possible to pick the drive just from the dogs rather than the taper, thus leaving a degree of float, but this might be noisy and noise tends to imply potential for longer term damage to the shaft or dogs, etc. So some questions: does anyone know what solution Midgely and Sutcliffe used? How did other makers deal with the issue? Any thoughts on the merits of the options, or other suggestions?

Nick

When you stop learning you start dying

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Nick Kempley
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Re: Driving a horizontal head from a vertical mill

Hi Nick
If I read and understand correctly.
You understand that the mill locates on the taper and a majority of the drive comes from there not the dogs.
Also the taper is employed to align the tool with concentricity it cannot just flo9at.
if the tooling clamp bar has sheared its because of something else happening are you certain its a 40 int set up?
I run an elliot omnimill which is mt3 but have a load f mismached stuff you need to be carefull of clearence on draw bars I currently have one for each piece of tooling.
they draw the taper in they don't drive the tool.
A lot of bridgeports have a location peg in the quill many of the ones I have used have it broken off but if the R8 tool id tightened correctly it grips in the taper fine.
regards
Alan

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