Victor,
Go to a bearing supply house and ask for a power train design book. Most manufacturers like browning have the design info in the book, and most are free for the asking. Finding a bearing house local to you is as easy as looking up bearings in the yellow pages.
If you can't find an off the shelf sheeve bored to size it is not that expensive to have one fit by a local machine shop. You need to concern yourself with horsepower and the drive pulley diameter as to small a diameter for the hp will slip. Cogged belts require width enough to handle the hp at the desired RPM. There is no easy answer, or one answer for all.
I have had better luck with multi "v" belts. They handle a lot of power, and don't make as much noise. No matter what type of belt you should have bearings on both sides of the pulleys to help support the load, making belts last longer.
Kevin Pemberton
On 04/20/2010 10:34 PM, vjmtymo wrote:
Years ago I jumped into the group trying to figure out the particulars of e-drive in my 36ft sailboat. At the time, I thought it wouldn't work but am now having quasi-sublime second thoughts, particularly as I prepare to lug the diesel out of the garage and, somehow, up into the hull. If you're rolling around on the ground saying "I told you he'd be back" well, get it all out of your system and then read on.
I've heard 48v is too much, just right, and of course, not enough. A local Canadian EV shop in the neighbourhood recommends 72v, but I have my doubts. Maybe I should just jump in with both feet and see what happens, so, having priced out and sourced all the parts for an Etek RT system in 48v, I now need the drive system parts. Kind souls of this forum sent good info on how to use a trailer hub for a thrust bearing (Dave?) and pillow blocks (others). My boat is steel, my medium is steel, and I've got enough scrap left over to make any kind of frame for the motor etc. I'm just a bit hung up on the pulley thing: the shaft for the Etek is 7/8 with a keyway. How do you connect this to an off-the-shelf synchronous pulley? Is there one that has range for this shaft? Where do I get it (them) to obtain decent reduction around 2:1? Please excuse my lack of power transmission knowledge.
So, if anyone's up for downloading their know-how yet one more time, I'd greatly appreciate it. In the meantime, I'll chase a few crows if that helps.
Victor
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