- Joined
- Feb 2, 2013
- Messages
- 3,622
Now that i have a big lathe (Victor 2040) with a lota motor (7.5hp, 3 phase),
i'm collecting tooling large enough for the scale of the machine.
that means 3/4",7/8 &1" tools for the enormous CA sized toolholders.
(for size comparison- i didn't buy Aloris
[https://www.aloris.com/aloris_cat/31e970.pdf])
i have not ground lathe bits larger than 5/8" before, but the same basic principles should apply to larger tooling as it does to small tooling.
{i say the same principles should apply, because i'm hoping my speculation is correct
}
this experiment has continued from small machines, and will extend to this larger machine.
my first victim is a lovely HSS blank marked only PURPLE LABEL , a 7/8" square blank with 5° ends pre-formed
my thought was to use my 12" grinder to remove most of the metal in the relief areas,
and then use the 618 surface grinder and an angle jig to precisely grind the largest lathe tool i have tackled yet!
the simple tool took about 35 minutes to grind, the time was split between the rough grind and the surface grinder.
i flipped the tool and reset the jig often through the process to ensure i would hit the cutting edge at the same height.
although his tool was ground as a left hand tool, it will work as a right hand tool also, if the tool is rotated 90° in the toolholder !
here is the finished 10° tool- 1/16 nose radius
top view left pic , front view right pic
and for size comparison....
Left AXA toolholder with 3/8" tool installed- Right CA toolholder with 7/8"tool installed
i'll be grinding a couple more varied geometry tools very soon to do a Pepsi Challenge.
come along for the ride, if you like this kinda stuff!
chips be flyin' soon
i'm collecting tooling large enough for the scale of the machine.
that means 3/4",7/8 &1" tools for the enormous CA sized toolholders.
(for size comparison- i didn't buy Aloris
[https://www.aloris.com/aloris_cat/31e970.pdf])
i have not ground lathe bits larger than 5/8" before, but the same basic principles should apply to larger tooling as it does to small tooling.
{i say the same principles should apply, because i'm hoping my speculation is correct
}this experiment has continued from small machines, and will extend to this larger machine.
my first victim is a lovely HSS blank marked only PURPLE LABEL , a 7/8" square blank with 5° ends pre-formed
my thought was to use my 12" grinder to remove most of the metal in the relief areas,
and then use the 618 surface grinder and an angle jig to precisely grind the largest lathe tool i have tackled yet!
the simple tool took about 35 minutes to grind, the time was split between the rough grind and the surface grinder.
i flipped the tool and reset the jig often through the process to ensure i would hit the cutting edge at the same height.
although his tool was ground as a left hand tool, it will work as a right hand tool also, if the tool is rotated 90° in the toolholder !
here is the finished 10° tool- 1/16 nose radius
top view left pic , front view right pic
and for size comparison....
Left AXA toolholder with 3/8" tool installed- Right CA toolholder with 7/8"tool installed
i'll be grinding a couple more varied geometry tools very soon to do a Pepsi Challenge.
come along for the ride, if you like this kinda stuff!
chips be flyin' soon
