I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does get
"cocked". but that was in a square shank toolholder, not a blade type as
used with the 77.

"Louis Ohland" wrote in message
...
I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does get
"cocked". but that was in a square shank toolholder, not a blade type as
used with the 77.

You didn't comment on your lathe. Won't help much if it's a light duty
machine. Parting is a very difficult operation, requiring good rigidity.

Harold

Harold and Susan Vordos wrote:
"Louis Ohland" wrote in message
...
I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does get
"cocked". but that was in a square shank toolholder, not a blade type as
used with the 77.

You didn't comment on your lathe. Won't help much if it's a light duty
machine. Parting is a very difficult operation, requiring good rigidity.

It's an 11x26" lathe from Grizzly, a G9972Z or Zangzhou Supermachine
Company Bench Lathe CQ6128A×660

http://www.gilanet.com/ohlandl/lathe/CQ6128A.html 1HP motor.

Harold and Susan Vordos wrote:

"Louis Ohland" wrote in message
...

I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does get
"cocked". but that was in a square shank toolholder, not a blade type as
used with the 77.


You didn't comment on your lathe. Won't help much if it's a light duty
machine. Parting is a very difficult operation, requiring good rigidity.

The only way to go on light hobby machines is to fabricate a rear toolpost,
and then mount a cutoff tool upside down. It works really well, but it's
quite a bit of effort to do it. I did it on my 9" SB with two kits from
Metal Lathe Associates - the T-slot cross-slide table, and the rear toolpost.

GWE

--
Posted via a free Usenet account from http://www.teranews.com

Pardon, but what is a "light" or "hobby" lathe? I can vividly remember
getting the bed down into the basement.

Also, Aloris does make a reverse holder for T blades.

Grant Erwin wrote:
Harold and Susan Vordos wrote:

"Louis Ohland" wrote in message
...

I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does
get "cocked". but that was in a square shank toolholder, not a blade
type as used with the 77.


You didn't comment on your lathe. Won't help much if it's a light
duty machine. Parting is a very difficult operation, requiring good
rigidity.

The only way to go on light hobby machines is to fabricate a rear toolpost,
and then mount a cutoff tool upside down. It works really well, but it's
quite a bit of effort to do it. I did it on my 9" SB with two kits from
Metal Lathe Associates - the T-slot cross-slide table, and the rear
toolpost.

GWE

"Louis Ohland" wrote in message
...
Harold and Susan Vordos wrote:
"Louis Ohland" wrote in message
...
I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does get
"cocked". but that was in a square shank toolholder, not a blade type as
used with the 77.

You didn't comment on your lathe. Won't help much if it's a light duty
machine. Parting is a very difficult operation, requiring good rigidity.

It's an 11x26" lathe from Grizzly, a G9972Z or Zangzhou Supermachine
Company Bench Lathe CQ6128A×660

http://www.gilanet.com/ohlandl/lathe/CQ6128A.html 1HP motor.

Having looked at the link, I'm of the opinion that you will have some
trouble with parting----likely considerable chatter, and perhaps even the
part climbing the tool. It's hard to say with certainty. Not trying to
discourage you in any way, just to put you on notice to use caution to avoid
crashing. Keep everything as short and as close to the chuck as you can
when attempting parting. Light feed tends to be worse than coarse feed
where chatter is concerned------and lubrication is mandatory. Do not attempt
parting dry---not even with a rigid machine. Few materials will part dry
successfully. Spindle speed is likely be quite critical---too slow isn't
good, nor is too fast. If you start out too slowly, you're likely to have
a ton of trouble, especially with hand feeding. As dangerous as it may
sound to you, if your cross slide has feed, learn to use it for parting. If
you select a good rate, it will be constant and provide a continuous,uniform
chip that won't yield any surprises. Best thing you can do is work a
little with the operation and learn what works for you on your particular
machine.

A word of caution: Avoid parting mild steel if possible, assuming you do
have problems with parting. It is one of the worst materials you'll ever
encounter because of its propensity to tear. Leaded steels (or any of the
free machining grades) will point out the differences immediately. They
are an excellent choice if your application doesn't demand they can't be
used.

Grant's suggestion of installing a rear parting tool isn't a bad one to
consider, for more than one reason

Luck!

Harold

The only way to go on light hobby machines is to fabricate a rear
toolpost,
and then mount a cutoff tool upside down. It works really well, but it's
quite a bit of effort to do it. I did it on my 9" SB with two kits from
Metal Lathe Associates - the T-slot cross-slide table, and the rear
toolpost.

GWE


for what it's worth, I have a 12 inch X 48 inch Logan Powermatic - I don't
know if that's light duty as you suggest or not, but it's certainly not a
heavyweight industrial monster - it seems to part off fine using the Aloris
BXa7 parting blade holder - I haven't tried the carbide insert blades
(yet) - the trick, for me, seems to be getting the blade truely
perpendicular to the axis of rotation, and learning what speeds work on the
lathe - but I can part off 2 and 3 inch stuff (aluminum and steel) ok,
though of course aluminum and even brass are a lot faster at least than
steel. And I found that hand feeding using a constant pressure seems to
work well for me, but then again, this is a sample of 1



--
Posted via a free Usenet account from http://www.teranews.com

On Sun, 09 Dec 2007 19:17:59 -0600, Louis Ohland
wrote:

Pardon, but what is a "light" or "hobby" lathe? I can vividly remember
getting the bed down into the basement.

Anything under 1200 lbs.

I think my smallest lathe..the Hardinge HLV-H, which is only
9x18...weighs something like 1500 lbs

Gunner


Also, Aloris does make a reverse holder for T blades.

Grant Erwin wrote:
Harold and Susan Vordos wrote:

"Louis Ohland" wrote in message
...

I've been looking at the Aloris AXA-77 to get away from hacksawing.

Comments? I've used insert cutoff tools before, and the insert does
get "cocked". but that was in a square shank toolholder, not a blade
type as used with the 77.


You didn't comment on your lathe. Won't help much if it's a light
duty machine. Parting is a very difficult operation, requiring good
rigidity.

The only way to go on light hobby machines is to fabricate a rear toolpost,
and then mount a cutoff tool upside down. It works really well, but it's
quite a bit of effort to do it. I did it on my 9" SB with two kits from
Metal Lathe Associates - the T-slot cross-slide table, and the rear
toolpost.

GWE

On Dec 10, 3:27 am, "William Noble" wrote:

for what it's worth, I have a 12 inch X 48 inch Logan Powermatic - I don't
know if that's light duty as you suggest or not, ...
...And I found that hand feeding using a constant pressure seems to
work well for me, but then again, this is a sample of 1

Make that 2. I have a worn 10" South Bend, a good lathe but no
heavyweight.
I part with a hand-fed Enco HSS blade at whatever (low) speed cuts
smoothly, with pipe threading oil from HD fed into the cut with a
needle oiler.

303 SS, cold and hot rolled steel cut pretty well as long as there's a
little oil flowing but if I stop the oil the blade will jam within
about 10-20 Seconds. I keep the belt loose and use low-inertia collets
instead of a big chuck if possible so the blade rarely breaks and I
can back off and feed in slowly until the rapping noise stops.

I hold the blade vertical when grinding to get a concave surface which
is easy to touch up with a hand stone.

I rarely use power crossfeed only because gear train noise blocks out
the sound of the tool.

Jim Wilkins

Louis Ohland wrote:

It's an 11x26" lathe from Grizzly, a G9972Z or Zangzhou Supermachine
Company Bench Lathe CQ6128A×660

http://www.gilanet.com/ohlandl/lathe/CQ6128A.html 1HP motor.

That is light. Carbide part-off-tools are a waste of money for this lathe.
You'll ruin more carbides than you want to know.

Get HSS tools and a coolant pump, that will make you happy.


Nick
--
The lowcost-DRO:
http://www.yadro.de