Colchester toolpost help

Hi all

I have a Colchester toolpost but unfortunately I have no tool holders. I'd like to make some but due to its design I can't easily get an accurate measurements from the toolpost it's self. I've attached some pictures that I've found on line. If any one has this toolpost, could I get some dimensions of your tool holder please.

Thanks

Steve

Alan Pearce has just done a great series of videos on just this in several designs well worth a look

Bob

Steve, is it the dovetails you are having trouble measuring on the existing toolpost? If so have a look for an article in MEW recently by Jaques Maurel about measuring angles. He has shown a neat pin and plate jig to help measure angles accurately, and it is really simple to make. It will allow high accuracy measurement of the dovetails.

Bob Astill

Thanks iv just subscribed to his channel.

Jeff Dayman

The problem I have is that one side of the dovetail on the tool post has 2 angles so it's quite difficult to get a good measurement.

See attached.

Hi Steve, Thanks for the sketch, it clears things up a bit.

Attached sketch below shows how the angle positions could be measured using Mr Maurel's jig and a modified version of it to establish the angled face locations. Hope it helps.

Note that in each case the pins are screwed to the plates to make the jigs easier to hold in use, and the plate edge is back from the pin dias to ensure you are measuring from pin face as intended, not plate face or edge.

Very interesting Jeff I would have never thought of that please see attached a picture a friend send to me when I asked advice on the same issue his name is Everett and he has a YouTube channel called Everetts workshop very nice chat always happy to help definitely worth checking him out.

Hi Steve, just fyi if you wanted to read Mr Jaques Maurel's full article on measuring dovetails it is in ME 4588 june 2018, starts pg 842. Couldn't find it earlier this week in my mag stash, but did today.

Edited By Jeff Dayman on 16/03/2019 15:29:04

Edited By Jeff Dayman on 16/03/2019 15:29:43