The Shop > Tools
lathe tool post advice
Houtenkrullen:
--- Quote from: Arbalist on October 03, 2015, 11:21:03 AM ---If you mean a grinding jig Chris, then yes, I use this one.
--- End quote ---
The commercial one has a flat side down, your jig is turned 45 degrees (corner down) right?
May I ask what angle your jig presents the tool to the grinder? (I assume horizontal angle is square, vertical angle is ?)
Thanks for the nice pictures and info!
Peter
Arbalist:
Peter, the table of my belt sander is set at 90° to the belt so the bottom of my jig is also 90°. The included angle at the top of the jig is 60°.
The tools are made from some old weights from a gym machine that was going to the scrap yard. No idea what type but it is steel of some description rather than cast iron. It cuts pretty well but there have been one or two hard inclusions in a couple of pieces but I've had that in gauge plate before.
I've only got a small 8 x 14 lathe and it hasn't got a lot of oomph so I don't (can't) generally take large cuts but the other day I was using my Tangential tool to take a fairly large cut on a long bar and I had a string of swarf coming off the work red hot so these things can remove a lot of metal if you need them to. It did occur to me that the design might struggle with interrupted cuts but I've had no problem with this so far.
PekkaNF:
Just one fast one in between OT:s :wave:
One thing that might be of consequense (or not) is how you like to use DRO. If DRO has easy way to input tool (and finds the offset) then mechanical quality (repeatability) is fairly high on the list. And so is the price.
Then again if workflow is such that there is no need to swap tools in between cuts, then it's possible to zero (or dial in diameter for) each tool when needed and good repeatability is not such a problem.
I bought two QC-toolpost and I mounted the first one that way, that second one can be adjusted same relative centre heigt, making it possble to use QC-tools on both lathe without disturbing the tool height adjustment. In my opinion ease of tool chance is convenice only if you need to set the height only once.
I have used cheap Fourway TP and they don't work for me....I use a whole lot boring bars, rest of tools are always on my way, if I need porkypine I rather had it on tail end than cross slide.
O-O
Pekka
Andrew Wildman:
So the tool post arrived from Arc today. opened up the parcel and was impressed with the quality. I took the old post off and mocked up the new one in position and....realised it was probably a bit small for the wide top slide on the L5. :doh:
I ummed and aarred for a bit and then bit the bullet and packaged it back up again to exchange for the 200 size. Arc were happy to take the tool post back. Now just have to wait for the bigger one to arrive.
It was the right size for the centre height but the tools would have to hung out quite a way to clear the top slide.
Houtenkrullen:
OK, on topic then :'(
:-)
I use a quick change toolpost most of the time (multifix). But I exchange it for some dedicated toolpost I have. For example one for cutting threads (quick retract: metric threads on imperial leadscrew...)
I think a fourway toolpost is quicker than a quick change if all the tools can be fitted to it. So for repetitive/specialized work it might actually be better to swap toolpost!?
A Morse taper tailstock is also quick change in a way, but 0sometimes a tailstock turret is more appropriate isn't it?
Still !I would not be without my qc toolpost!
Andrew, success with your new toolpost once it arrives, I am sure you won't regret the change.
Peter
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