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Any old iron (as long as it's British!)

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Andrew Wildman:
the machine wiring was all ditched and replaced with a modern starter unit and wiring that did not have cotton braid!.  I will probably put the cable up to the head in flexible conduit eventually:



Machine in its final resting place - the grinding and welding corner


Still needs a paint and I am looking into replacing the gears for the table feed as they are shot and means that the table feed is not as smooth as I would like.  I will update as I get these little bits sorted.

philf:
Very nice Andrew - well done and well documented restoration.

I have the Union equivalent which I suspect needs the same treatment. The work table isn't parallel to the slide.

The drive pinion on mine looks as though it's been filed and the drive feels very rough.

Your final picture shows I think a magnetic chuck on the table. Can your grinding wheel cover the whole chuck? Mine has a different grinding spindle (double ended and with a seperate motor) to what I think was fitted originally and I can't cover the width of the table.

Cheers.

Phil.

Andrew Wildman:
phil, The mag chuck is not original it was a flea bay purchase (£20) and is a eclipse model (something like ak47 but I will have to go and check!).  It covers the length easily but only just covers the width.  I have knocked up a dresser this morning and have had a go at surface grinding.  The results are ok except that if you look in the right light there are fine ripples on the surface.  I will post some pics in a bit on the main forum.

Some of this is due to the worn pinion but some is also probably due to me not having the right wheel etc.  I guess I cant expect to much from what is just a tool and cutter grinder.

Do you know what size the pinions are?  My measurements point to 14dp but I am not 100% sure.

philf:

--- Quote from: Andrew Wildman on January 04, 2014, 10:30:38 AM ---Do you know what size the pinions are?  My measurements point to 14dp but I am not 100% sure.

--- End quote ---

Andrew,

I just measured the rack with a steel rule and mine works out to 16DP (give or take a midges). I don't know the reasoning behind using a straight spur gear on an rack with angled teeth. Maybe it has some of the effect of a helical rack but there must be a lot of sliding involved which is maybe why the pinion wears out.

I got mine to run a bit smoother by shimming out the rack to give better engagement with the pinion.

Cheers.

Phil.

Andrew Wildman:
Thanks.  I will recheck my measurements.  Mine could well be different anyway.  I am hoping that I can use standard parts from hpc gears, with the bores and widths modified.  I don't have any change wheels for my dividing head for helical gears, its they look like a pain to make!

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