motor mount.

[kingcreaky]

Again, I am very new to this, so my reason for posting is as much to give you something to read, but also to run my method by you all incase im doing anything vastly wrong.

You may remember, my lathe is working, but I am trying to get the mill working. The motor on it, wont work under 240 three/phase via vfd so Ive sourced another 3 phase motor that can be run from a vfd



but the old motors mount wont fit it,



so Im making another one. the idea is, a ring...





I cant think of a way of cutting the inner circle out...  If the mill was working, I could use a rotary table? but the mill isnt working so... and my parting blade is to thick to cut a circle (if you follow)... so?



thoughts?

[dallen]

trepanning bit, would be what I would use if I didn't have cutting torch in the shed.

you can grind the bit out of a hunk of HSS for a one off job. tried to find a link to a image of one but lost that battle, maybe one of the other guys can explain how to grind one.

DA

[DaveH]

I've done what you seem to be doing - use a hole saw then finish it with a boring tool.
 
DaveH

[f350ca]

Either will work, the hole saw is really a full circle trepanning tool. If you use the hole saw drill some holes in or along the edge of the saw cut to aid in cutting removal.
Can't tell from the photos, how did you hold the part to cut the OD and now the ID?

[John S.]

Thought you were going to pop round and pick the other motor up and I'd cut you a new plate and keyway the pulleys for you ?

[kingcreaky]

Eventually made it over to John S on Tuesday night, this time thankfully, not writing off a car.

Once again, want to say a massive thankyou, for everything he inadvertently taught me, and of course... for the wizardry he performed extending my motor shaft

before


after




this enabled the pulleys, once mounted to line up



and finally, the mount is finished




may not seem much to you lot. But everybody has got to learn somewhere!

[John S.]

Matt,

Those missing clamps for the ram. Just had a thought If someone started to strip this mill and removed the clamp bolts the clamps could have dropped into the base of the casting.
Well worth getting a torch and having a look through the coolant hole at the back to see if they are there.

Save you making a couple and then you will only need a couple of new clamp bolts .

[Mayhem]

Nice work

[Charles Spencer]

(08-13-2015, 03:13 AM)John S. Wrote: Well worth getting a torch and having a look through the coolant hole at the back to see if they are there.

NB Americans:  I'm assuming he means an electric torch.  What we call a flashlight.

[Mayhem]

You would be correct Charles