Victor,
The power transmission parts are very straight forward. Several companies (Gates, Dodge) make a wide range of parts. The pulley is fitted to a tapered bushing with a keyway that fits your shaft. Google "QD Bushing" to see what I mean.
Use the "Designflex" program on Gates' website to spec your parts - you enter your shaft and motor data, the program spits out a list of assemblies (two pulleys, two bushings, one belt) that meet your criteria and sorts it by price.
You can buy the parts from any bearing and power transmission retailer or on the web. The sellers can interchange brands so you can take the list of Gates part numbers to a Dodge dealer, etc.
Denny
On Wed 21/04/10 2:56 AM , John Raynes johncraynes@
Victor,
Baldor makes a 2:1 reducer that will fit a 7/8 shaft. I have one but it has been altered. If you want a belt drive you will need mounting brackets, cleated belt and pulleys. A cleated belt will run quieter but the gear reducer eliminates the belt. Both methods are high efficiency contrary to what some people will tell you.
John
On Wed, Apr 21, 2010 at 1:34 AM, vjmtymo <vjmtymo@yahoo.ca > 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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