I Do This For The Glory
Join Date: Dec 1999
Location: Nobleboro, Maine
Thanked 0 Times in 0 Posts
Re: Dual T-cases
JHS is right about the alignment. I am a pump expert and have seen many failures on direct coupling and belt driven pumps, 75% of the time the failure is due to improper alignment, 20% of the time it's overlubrication, and 5% of the time it's other smaller factors. The alignment MUST be in all 3 axis, not just one, and not just "close". Once aligned properly, the bearings are expected to last, with proper lubrication, over one million hours. Improper alignment and improper lubrication are the two most common failures I see in my field. On the less critical items, it's OK to get them close, like within 0.020", but on the more critical pieces of equipment we use laser alignment devices.
If the couplings are mounted to the same frame, then proper alignment is more likely.
The flexible couplings will work and are a good idea, but they are not designed for high RPM applications, typically not over 3,600 rpm's, which is what most electric motors use. There are several different coupling designs available, with fixed and removeable flexible bellows, but none that will really work. I looked into them for a tranny swap, but came up empty. I'm going to design my own subframe and use it for the tranny swap later on, I know how to align the couplings, but it ain't gonna be easy for use long term. U-joints are a good way, keep in mind you have to use 2 of them so they'll self cancel, or you can use a CV shaft.
Winter Harbor, Maine
'81 CJ-8 Scrambled, It's a Jeep, Chevy, IHC kinda thing!
'88.5 Zuki, 5" Calmini, Locked, Swamped, Rolled, and just generally broken in right!