Lathing question.....

[Firstgear]

I don't know PM machines , 14 x 40 ?

Why can't you just cut the bar first to maybe 11"s , chuck it and turn it ? Then saw it or part it off to 10" .

Don’t have a band saw...but it looks like I should get one! Sooner than later!

 

[mmcmdl]

Got an angle grinder and cutoff wheel ? Use that .

 

[Firstgear]

I have my die grinder and can be hell on wheels with that.....I will come up with something. Worse come to worse I can drive over to a friends shop and use his band saw.....

 

[mmcmdl]

You could just part it off in the lathe to length , but be wary of your rpms . You don't want that PM to walk on over to your neighbors house !

 

[Firstgear]

You could just part it off in the lathe to length , but be wary of your rpms . You don't want that PM to walk on over to your neighbors house !

My wife who has been very supportive might change her tune if that happened!

 

[mmcmdl]

LMAO , I'm sure of it . Those whipping bars will destroy anything in their paths !

 

[Tozguy]

Don’t have a band saw...but it looks like I should get one! Sooner than later!

What about a good old fashioned hacksaw? With a good blade the job would be done in two shakes of a lamb's tail.

Seems to me that I would cut to 11'' with a hacksaw, face and drill a centre divot in each end.
Zero the work in a 4 jaw independant chuck for cutting the centre divots.
Mount a centre in the 4 jaw and zero it. You will have 1'' of stock to mount a drive dog.
Turn it between centres using a follow rest. Cut towards the headstock.
Avoid skim cuts, use the right tool and grind, d.o.c. and feed rate.
After reaching final diameter, remove the work from the centres, chuck in a 4 jaw and part to final length.

do I also need to line up the spider on the bar prior to facing off the one end?

Please explain this, what spider?

 

[mmcmdl]

Hacksaw ? They still make them?

32 years ago I walked into my production managers office with a tooling req loaded with Valenite insert drills and cutters . He looked at it and nearly fainted ! He asked what in the heii do we need these for ? I explained to him that he had a brand new , very large Makino VMC running production with HSS tooling at a snails pace . He didn't understand what I was saying , and stated the tools are cutting . I simply told him a file also cuts , and when those HSS tools give out , I'll send my men up on the platem with files to cut his parts out . I got my tools . Correct tools for the job .

 

[Mrlathe]

As said above give yourself an inch or two extra,say cut at 12",face it ,center drill chuck it up and off you go.

 

[Firstgear]

What about a good old fashioned hacksaw? With a good blade the job would be done in two shakes of a lamb's tail.

Seems to me that I would cut to 11'' with a hacksaw, face and drill a centre divot in each end.
Zero the work in a 4 jaw independant chuck for cutting the centre divots.
Mount a centre in the 4 jaw and zero it. You will have 1'' of stock to mount a drive dog.
Turn it between centres using a follow rest. Cut towards the headstock.
Avoid skim cuts, use the right tool and grind, d.o.c. and feed rate.
After reaching final diameter, remove the work from the centres, chuck in a 4 jaw and part to final length.


Please explain this, what spider?

Spindle spider, out the other end of the spindle, 4 bolts that contact the shaft to help give support to the work piece so the chuck bearings aren’t “loaded” in a cantilevered fashion.....