Old School Mechanic Needed

[LowGear]

I'm electrifying a Polaris ATV with the innards of an old electric golf car.  I had my motor mount cut by the welding shop down the road with their plasma cutter.  What a neat machine but I digress.  I missed on two of the holes by about 1/4 inch.  Its made of 3/8ths plate steel.  The two primary holes are really nice but these second two really make the mount seem much stronger.  I don't really want to rat tail file the 3/8ths holes for a quarter inch so I was wondering if there was a fix besides welding up these holes and re-drilling new ones? 

Casey

[Tom Reed]

Thread the holes that are in the wrong location, screw in a bolt with locktite and grind smooth. Redrill new hole in desired location.

[luv2weld]

If I'm reading this correctly, you have 2 holes that are 3/8" in diameter through a
piece of 3/8" plate that are 1/4" off??

Why not just use the rat tail file and then flat washer it??
Flat washer (or fender washer) between the motor and plate on all 4 holes.
I don't know how much stress is going to be put on the motor, but I don't think
it would give you a problem with shifting.
To make sure, you could always use Loctite Sleeve retainer on the the washer to plate
surfaces.

Ralph

[Crofter]

I think I would be filling with weld, grind flat and re-drill.

[mobile_bob]

plus one for welding in shut and redrilling

use a mig and lace it shut, grind and redrill and it will be perfect

much better repair, cheaper and probably quicker than going to the store for flat washers or loctite.

fwiw

bob g

[vdubnut62]

I'd weld 'er up too
Ron.

[rl71459]

I vote for the weld it drill it method also

[rcavictim]

I also vote for weld, grind and re-drill.  That would be far easier than trying to insert a threaded plug.

[Carlb]

I also agree, weld, grind and re-drill

carl

[Crofter]

Off topic, but, that drill, tap, plug, offset and repeat, is an excellent way to sew up a freeze crack.

[LowGear]

I think it's pretty much resolved.  Either I weld up the hole and re-drill or fudge the truth.  I did consider going to a #7 or so 1/4" bolt but I'm too ignorant to know if that would be strong enough.

Thanks,
Casey

[rbodell]

Too much work, just get one of these.

https://picasaweb.google.com/rbodell/Mar62011#5580967802532849714

[LowGear]

Aloha rbodell,

I understand the grade 8 is only two bits but the insertion tool is $189.00.  This drawing might do well on the old "get screwed" poster.  Or bank here ad.

Casey