Help 1

[Tmoore]

Hi everyone,
I have a part that was manufactured improperly, and I need to fix it as quickly as possible. Basically, we had a through drilled through our part that was 1.875" in diameter, and then a from the center of this part out in two directions, the hole was enlarged to 1.90". So basically, starting at one end, you have a Ø1.875" hole for 2.5", then for the next 10" the hole is Ø1.90", then the last 2.5" of the part the hole goes back down to Ø1.875".
Basically the holes on the outside are still Ø1.875&quot;, but the inner part of the hole is < Ø1.875, instead of being Ø1.90&quot;. This part was going to be machined by our parent company that has the capacity to make this kind of cut, but we do not,so we need to find a supplier who is capable of making this cut for us. Do anyone out there know of a company that could make this kind of cut? The closer to Ontario, Canada the better...
Thanks for any suggestions,
Tom

 

[hoja]

What kind of material is this? and what's the overall size of your piece where the hole was drilled?

 

[Tmoore]

The material is 304 stainless steel. This hole is drilled into the bottom left hand corner of a rectangular part, and this part is 15&quot;x 24&quot; x 6&quot;. Just to clarify, this is a sand cast part, and the hole is not completely drilled, it is just ground to a finish after casting to the dimensions I mentioned in my first post.
Thanks,
Tom

 

[diamondjim]

Can it be drilled over size on
one side then c-bored for an
oversize bushing on the same side?
Sounds like a manufacturing
nightmare or poor design.
Second option: drill thru over
size and c-bore both sides for
oversize bushings.
If you can live with 1.875 thru,
you might be able to ball size
the hole.

 

[rnd2]

The part is not large. Sounds like a job for a lathe with a 4 jaw chuck and boring bar. There should be plenty in Ontario