| Sysop: | Amessyroom |
|---|---|
| Location: | Fayetteville, NC |
| Users: | 43 |
| Nodes: | 6 (0 / 6) |
| Uptime: | 96:22:05 |
| Calls: | 290 |
| Files: | 904 |
| Messages: | 76,426 |
"Snag" wrote in message news:vbgc4r$15175$1@dont-email.me...
On 9/6/2024 8:07 PM, Jim Wilkins wrote:
I read somewhere that chuck backplates for threaded spindle lathes
should be soft cast iron instead of steel to minimize spindle thread wear. ----------------
A piece of cast that size is a good bit more expensive ... if I could find one .
Snag
---------------------------------
Gym weights?
A dumbbell became the ball pivot feet of my hoisting shear legs. The
iron cut easily enough without annealing in the wood stove. I judge cast iron's condition by the chips, compared to known-good pieces like
backplates. The worst crumbly cast iron I've machined was the head of a Duracraft drill press. Pipe fittings have mostly been pretty good, as
was my second-hand (self-annealed) Taiwan wood stove to which I added a
small window.
http://www.chaski.org/homemachinist/viewtopic.php?t=102818
https://www.slfcastings.com/heat-treatment/
I turned 1-1/2 - 8 and 2-1/4 - 8 dummy spindle ends that fit my Bison
chucks closely to use as Go gauges, and to take on treasure hunts to
check sizes instead of trying to measure or guess between 2-1/4 - 8 or
2-3/16 - 10. The 2-1/4 - 8 stub was a scrap of 2" water pipe. The 1-1/2
- 8 stub has a 1.00" shank to mount a Jacobs 58B chuck in a collet.
"Bob La Londe" wrote in message news:vbfsur$vcb3$1@dont-email.me...
You have a back plate that fits into a 5C spindle? I have a lathe with
a 5C native spindle. Maybe we could horse trade... if I had a horse.
Bob La Londe
---------------------------------------
LMS sells them, 5478 and 5479, listed with 5C instead of backplates. https://littlemachineshop.com/products/product_view.php?ProductID=5478&category=
A 5C fixture mount can be an unfinished custom backplate.
On 9/6/2024 5:41 PM, Jim Wilkins wrote:
"Bob La Londe" wrote in message news:vbfsur$vcb3$1@dont-email.me...
You have a back plate that fits into a 5C spindle? I have a lathe with
a 5C native spindle. Maybe we could horse trade... if I had a horse.
Bob La Londe
---------------------------------------
LMS sells them, 5478 and 5479, listed with 5C instead of backplates.
https://littlemachineshop.com/products/product_view.php?ProductID=5478&category=
A 5C fixture mount can be an unfinished custom backplate.
Push comes to shove I'd rather trade with Snag than Shars, but he does
say his needs some clean up. I have nothing against Shar's. I just
like Snag better.
"Bob La Londe" wrote in message news:vbhvrl$1egij$2@dont-email.me...
Gym weights is a commonly suggest alternative, but there have been
plenty of reports of voids, and hard spots as its the cheapest cast they
can get to stay together. If they are free and you are bored it makes a nice Saturday afternoon project, but I wouldn't go seek them out.
Bob La Londe
----------------------------------
Having a wood stove to anneal it and using HSS lathe bits and endmills
that I can resharpen lets me risk mystery metal. My lathe chucks are all
on purchased backplates, though I'd consider gym weight iron for a slow moving rotary table chuck adapter.
Where does one come across those weights ?
This time the Big Score is a 3 inch 3 jaw chuck on a 5c collet back
plate with 3 sets of jaw (all fit) for the princely sum of 10 bucks . A
piece of material for a 1 1/2-8 back plate will probably cost more than
the chuck . Also got a couple of open/reversible ratchet shorty wrenches
for a buck each .
On 9/6/2024 2:44 PM, Snag wrote:
This time the Big Score is a 3 inch 3 jaw chuck on a 5c collet back
plate with 3 sets of jaw (all fit) for the princely sum of 10 bucks .
A piece of material for a 1 1/2-8 back plate will probably cost more
than the chuck . Also got a couple of open/reversible ratchet shorty
wrenches for a buck each .
As expected , a piece of 1045 jut the right size set me back $17.50 .
A fully machined back plate would be over 50 bucks ...
This time the Big Score is a 3 inch 3 jaw chuck on a 5c collet back
plate with 3 sets of jaw (all fit) for the princely sum of 10 bucks .
A piece of material for a 1 1/2-8 back plate will probably cost more
than the chuck . Also got a couple of open/reversible ratchet shorty
wrenches for a buck each .
On 9/6/2024 1:19 PM, Snag wrote:
On 9/6/2024 2:44 PM, Snag wrote:
This time the Big Score is a 3 inch 3 jaw chuck on a 5c collet
back plate with 3 sets of jaw (all fit) for the princely sum of 10
bucks . A piece of material for a 1 1/2-8 back plate will probably
cost more than the chuck . Also got a couple of open/reversible
ratchet shorty wrenches for a buck each .
As expected , a piece of 1045 jut the right size set me back $17.50
. A fully machined back plate would be over 50 bucks ...
You have a back plate that fits into a 5C spindle? I have a lathe with
a 5C native spindle. Maybe we could horse trade... if I had a horse.
"Snag" wrote in message news:vbfo4k$uov3$1@dont-email.me...
On 9/6/2024 2:44 PM, Snag wrote:
This time the Big Score is a 3 inch 3 jaw chuck on a 5c collet back
plate with 3 sets of jaw (all fit) for the princely sum of 10 bucks .
A piece of material for a 1 1/2-8 back plate will probably cost more
than the chuck . Also got a couple of open/reversible ratchet shorty
wrenches for a buck each .
As expected , a piece of 1045 jut the right size set me back $17.50 .
A fully machined back plate would be over 50 bucks ...----------------