On Sun, 01 Jan 2006 01:39:48 -0600, Don Foreman
wrote:
On Sat, 31 Dec 2005 04:31:00 GMT, Gunner Asch
wrote:
Whats the best way to make a square hole in a round piece of material,
without a broach? The round rod needs to be split, so it can be
placed over a 5/8 square rod, and then be able to slide along that
square rod
The problem: I need a round bar, with a 5/8" square hole in the
center, to go over the square "run fowards/stop/run reverse" rod that
runs the length of the bed, under the acme threading screw, and the
feed rod.
The lathe is missing the run/stop/reverse lever and assembly, so I
want to make one. Pretty simple..but Ive been banging my head over
the best way to make something that simple. I finally did accomplish
it..but it was a serious pain in the ass.
I ultimately milled a half depth 5/8 wide groove in a 5" long chunk of
scrap stock, cut it in half so I had two halves, then milled all sides
so it was semi square, then chucked it in a 4 jaw, indicated on a 5/8
round stock slipped into the square hole, then turned to
diameter,about half the lenght, then removed, then put into a 3 jaw,
clamping on the already turned secton, then re-turned the last half to
match the first.
There has to be an easier way ( the shaper blew a drive belt..so its
on the Fix list)
This round with square hole gizmo..will be installed inside of a bore
that will be bolted to the bottom of the carraige, with the
run/stop/reverse rod running throuigh it. The assembly will remain
fixed..the round with square, will be the actuator for the swtich
rod..using a handle
Gunner
I'd make it in two pieces as you did, drill holes and insert locator
pins, and silverbraze it with EasyFlo45. Holler by email with
snailmail addy if you'd like a foot or three of that, Jerry Martes
gave me a lifetime supply I'd be happy to share some of. It's good
****, Maynard! Stronger than a good TIG weld in some sits.
Did you see the pics of the semi completed assembly, and its
application? Its pretty much done, but thank you ever so much for the
kind offer. I really wanted the thing to be in two pieces for eventual
wear adjustment. I can simply bend a piece of some material in a long
U shape, and put 2 of them in the gizmo.
From an erlier post
This is a machining hobby group..right? Im learning to be a
machinist. I think of this as a practical application/lab in the
course. This is not like making a steam engine, or a V8 or something
hard. I was just asking about the best way to do something simple.
I finished the moving parts this morning, all I need to do now, is
make the attachment bracket that bolts to the bottom of the carraige,
weld the body to the bracket, and make up a handle and weld it to the
handle ring, then attach the handle ring to the sleeve with some set
screws. I made a change in mid stream so I didnt have to use a snap
ring to hold it together..and the handle ring will be adjustable so I
can position it any angle I want. Ill photograph the whole thing when
Im done and its installed. Clausing wanted $400 for it..with a 6 week
turn around time...
http://pg.photos.yahoo.com/ph/gunnerasch4570/my_photos
clausing1 album. Shrug...I ddnt think to photograph cutting the groove
in the square bar stock. Actually a piece of P20 I think. Some tough
****. The mystery metal I used for the Body of the thingy..its
magnetic..and it rusts..but ****me it was hard turning..you can see by
the blue chips, and drilling it was interesting..chips came out as
flakes rather than curls. Shrug..I have a 6 foot bar of it..
I saw in the Clausing manual, that there is a gizmo that also attaches
to the run/stop/reverse bar..that you can put on to have the machine
automatically shut off at a certain point...I think thats next on the
list. That one will be a weldment I think. Got to keep my hand in
all the methods.
Gunner
"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.
Think of it as having your older brother knock the **** out of you
for torturing the cat." Gunner