@Brian I normally use an Aloris clone toolpost/toolholders and as ezeduzit rightly points out the overhang is a problem, the Boxford is about the same as an SB9 for rigidity and when parting from the front it does dig in sometimes to the extent it will deflect the toolholder down badly enough to trash the tip and/or blade.
Baz is right The tendency for the rear parting toolpost is to lift ever so slightly away from the work, conversely my front parting tool can dig into the work, the carriage wont lift far on the Boxford as there's a substantial retainer holding it down.
Parting from the front was/is a bit of a lottery and had to be fed by hand, parting from the rear I can use the power feed on almost everything even on tool steel.
@plunger it's left in position most of the time unless something big needs to be turned, and it certainly does chatter much less, the chips fall out nicely so there is little or no swarf bunching up in the parting groove. It's quite easy to remove & refit as it has one long tee nut making it easy to (re)locate in the cross slide slot.
Paul
Baz is right The tendency for the rear parting toolpost is to lift ever so slightly away from the work, conversely my front parting tool can dig into the work, the carriage wont lift far on the Boxford as there's a substantial retainer holding it down.
Parting from the front was/is a bit of a lottery and had to be fed by hand, parting from the rear I can use the power feed on almost everything even on tool steel.
@plunger it's left in position most of the time unless something big needs to be turned, and it certainly does chatter much less, the chips fall out nicely so there is little or no swarf bunching up in the parting groove. It's quite easy to remove & refit as it has one long tee nut making it easy to (re)locate in the cross slide slot.
Paul
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