The Shop > Tools
Issues parting off
75Plus:
Keep the blade as short as possible. Too much blade exposure allows flexing to occur.
Jonny:
--- Quote from: Bangkok Mick on November 06, 2014, 07:36:48 AM ---The tool is tapered towards the bottom to prevent it from grabbing, Mick
--- End quote ---
I have a few of them and they all do the same thing.
You can sharpen left, right or neutral it makes no odds the blade veers off left to right as its going into the job.
Have a look in other thread about parting off, maybe worth trying one of those T hss types and only leave the amount of tool hanging out to do the job. ie 1/2" protruding to part off 1" dia.
hermetic:
You realise that it is always best to lock the carriage (saddle) when parting off.I used to be ter
Phil.rified of doing it before I learned to lock off the carriage, now I'm only very afraid!
Arbalist:
--- Quote from: hermetic on November 07, 2014, 09:31:33 AM ---You realise that it is always best to lock the carriage (saddle) when parting off.I used to be ter
Phil.rified of doing it before I learned to lock off the carriage, now I'm only very afraid!
--- End quote ---
Agreed, I lock everything I can before parting on my Lathe.
We could get away without doing this on the Harrison's at work but small machines don't like it!
mechman48:
Hi Mick
I Had the same problems; as with other comments parting off seems to create fear & trepidation for a lot of guys.. keep the tool as short as needed, lock the saddle up, ensure the tool is square (90* ) on to the work, set dead on centre height, also make sure that your compound slide is snug & any backlash is eliminated, use plenty of coolant / cutting oil, keep it flooded or well oiled ( not in the usual sense ( :lol: ) once you start cutting keep the tool moving don't stop /start otherwise any slack that has been taken up by the downward forces will reappear & will have your parting tool tend to dig in again.
I have taken the plunge & forked out for a insert tip type parting off tool.. comes as a block plus blade (26mm) & 1 tip.. has improved my confidence no end, & have now parted off up to 2" aluminium bar :headbang: on autofeed at approx' 300 - 400rpm with the slowest power infeed on the cross slide. For steel I have made & used a rear parting off tool with the machine running as normal & a HSS blade, much better as the cutting forces are directed downwards on to the bearing bottoms/headstock casting.
The link for the tool I bought (usual disclaimer)...
http://www.rdgtools.co.uk/acatalog/Indexable-Parting-Tool-3mm-x-19mm-blade--10mm-shank--2534.html :thumbup:
George.
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