Re: Group question on machining something

Hey Gunner,

Not really sure why you want to do exactly what you describe, but for
the accuracy I suspect you need, or lack there-of in fact, I have two
suggestions.

A piece of 3/4 X 3/4 X 1/8 angle, cut to length twice, weld each into
a suitable round also sliced lengthwise in half.

or

Just use the round with a round hole that the drive shaft will fit
through, and put four set-screws cross-ways, or if it's longer than I
imagine, put 4 in each end, to form the "square" drive.

Take care. Happy New Year.

Brian Lawson,
Bothwell, Ontario.
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On Sat, 31 Dec 2005 04:31:00 GMT, Gunner Asch <gunner@xxxxxxxxxxxxxx>
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
>
>
>
>"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
.

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