Running Down Tool

I seem to remember seeing, either in one of the Magazines or on here someone describing a tool to reduce the diameter of round material for instance to reduce 5/16 round to take a quarter inch thread. Can anyone offer any help on such a tool? I should be most grateful, many thanks.

John

Is this what you mean.? Shame they are out of stock.

http://www.chronos.ltd.uk/acatalog/info_XC10____.html

John, here are two sites.1995 Vol175 no., 3999, Page 238. Fixed size running- down tool. By Peter Spenlove - Spenlove.

2004 Vol 193 no., 4228, page 214. Setting up the Clarke CL 300M lathe. Both these in ME.

Ian S C

I've got one similar to the Chronos one John (I may have brought it from them in fact) but it occurred to me later that it should be possible to modify one of my standard toolholders to take a front guide extension.

This would be a flat plate screwed to the front that could be simply bored to take the guides. I'd set the holder to centre height with the tool inserted, remove the tool, then screw the holder on and bore it at that height, I think it would probably work just fine.

Regards,

IanT

Capstan lathe roller box, available in all sizes from very small to huge, frequently appear in on-line auctions at modest cost, I use one with a 5/8" shank fitted to a block on the cross slide.

Many thanks to all those who replied to my question, I have one which I made way back very similar to the one in ME and also the one described by Peter Spenlove-Spenlove. However the one lurking in the depths of my mind (a dark place indeed) looked something like a spotfacing tool but with a hole through rather than a centre pin. Again many thanks for the help extended.

John

You are thinking of a rose bit. Described by Tubal Cain in ME also in one of his WPS books. File four teeth on the end of a hollow cylinder of silver steel (copy an end mill, but don't bother with flutes), harden and temper.

> 2004 Vol 193 no., 4228, page 214. Setting up the Clarke CL 300M lathe. Both these in ME.

Comes highly recommended

Most of the time I use a bar clamped to the toolpost with a hole in it, just ahead of the tool tip. I've reduced the diameter of 1/16" welding rods this way.

Neil

Go get hold of 'Making Small Workshop Tools' by Stan Bray, page 64----- A Rose Bit, page 67---- A Box Tool.

The box tool, maybe that's what your thinking of.

The box tool is just the ticket for doing what you want to do, I made two of these, one for for making 12 BA coach bolts and the other for making 10 BA coach bolts.

I use bronzing rods for making the miniature coach bolts, for 12 BA I use the 1.6mm and for the 10 BA, I use the 2.4mm rods.

http://www.cigweld.com.au/product/gas-tig-rods/comweld-tobin-bronze/

Got photo's of the box tools I made, if you want them.