Thanks for the links JJ. I reccond I must be dylexic, I have been to the Proclan site, but I cant make heads or tails of which motor is which.
Those mgg motors seem promising, but I already know of 2 others that have tried them and have been very disappointed in them. Comments from those guys suggest the shaft lenght is to short to allow for passing thru a bar mount and then attaching a sprocket. Not to mention the low torque numbers. I have searched the surplus center site and havent really found anything any better than what I already have for this particular purpose.
Oregon recommends a chain speed of 8000ftpermin for a .404 type chain. To determine chain speed, you use this formula. rpm x#teeth on sprocket x.067. My sprocket has 13pins or teeth. To get to the recommended 8000ftpermin, I need a shaft speed of 9184rpms. The only motors I know of capable of these kinds of speeds are the Parker f11s, and f12's. With cost of these motors around $2000, this sort of eliminates them from my budget. I have searched for 2 years for a used one, but they are hard to find. Minimum chain speeds are 3000ftpermin. I am thinking that this proclain motor is only rated for 3600rpms max which would give me a chain speed of 3135ftmin, not taking into account efficientcy losses. I have been told, but havent been able to verify, that this particular motor will turn 4600-4800 rpms, which would greatly improve chain speed, if this is true. Still not the numbers I am looking for, but better than nothing at this point.
It looks like to get the chain speed I desire, I have only 2 options. Buy a F11 motor, which I cant afford, or use a pulley and jackshaft system to double the speed at the saw. The pulley system also comes with risks. High speed pillowblock bearings are plenty expensive, and gearing up reduces available hp and torque. High speed on a jack shaft would also most likely require high speed balancing of the entire assembly, pulley, shaft. Also to consider are the lateral loads placed on the shaft material as it is being rotated into a piece of wood. What kind of material would be best to make the shaft out of.
One other option is to purchase a saw motor from one of the companies that sells processors. Sounds simple enough, but from what I have seen, they mostly use standard gear motors, throw a little extra oil at it, and live with the low chain speeds. I could be wrong about that, but I have looked at several, saw nothing special, and thought all of them cut to slow for my liking.
Since I have already built the saw mount, I might just hook it up, turn up the oil and see what happens. Motor might last and might not, but I think I will stand around the corner when I fire it up just in case. Whats the worse it could do, blow the seals out?
