What is best epoxy for aluminum casting?

Mark42

Fleet Admiral
Joined
Oct 8, 2003
Messages
9,334
The kids go kart uses a Peerless differential - common diff used on many small riding mowers, but in a 1" axle size. The "cone" shaped part of the differential housing on one side cracked and broke off. It is a cast aluminum housing. Before I order a new case half (about $60 plus shipping!) I thought I would try some epoxy and see how well it holds up.

Thought I would ask here for epoxy input! I'm thinking JB Weld might be the way to go. Or maybe Marine Tex?

BTW this is the second time this case half has broken. It happens when the kids get the kart air borne then when it lands, CRACK! The axle is only supported by 1" bearings at each end by the tires. To prevent this from happening again, I'm going to add additional bearings to the axle on each side of the differential, so there will be little or no stress transferred to the differential housing.

You can see the setup in this photo:

Captured2004-10-3100237.jpg


Its an old Rupp go kart from 1970 that I modified for "off road" use. Even though it only has a 5 hp motor, with the torque converter trans and the low gearing, it will climb steep inclines at tops out at about 25 mph. Its just too much fun!
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,610
Re: What is best epoxy for aluminum casting?

You can get it TIG welded. You have to use a certain alloy filler rod because it is cast.

Ask your question on welderweb.com. There are many knowledgable people on there that can answer your question.
 

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: What is best epoxy for aluminum casting?

Marine Tex is my preference, but JB Weld is easier to find.
 

rwise

Captain
Joined
Jul 5, 2001
Messages
3,205
Re: What is best epoxy for aluminum casting?

The electric glue would be the best if the welderdoes a good job. Looks like a lot of fun:cool::cool::cool:
 
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