|Forum topic by VeritasInnovations||posted 04-21-2015 11:09 AM||1343 views||0 times favorited||10 replies|
04-21-2015 11:09 AM
Hi Guys, I recently bought an item off of my “Lust List”, a mid 80’s Delta Unisaw. I brought it home and completely dis-assembled it and cleaned it thoroughly and re-assembled. I noticed when I re-installed the belts that they consecutively had increasing slack with the inner most to the arbor being the tightest and the outermost to the cabinet being the loosest. Even the slack in the outermost belt seemed to be enough to engage. I know that this saw sat for a while until the owner recently passed due to cancer, and the uneven nature of these belts could be the result of the drive pulley not being totally parallel to the arbor pulley (causing the uneven wear). I have a few questions concerning this….
1.) Are these belts possibly meant to be progressively looser ( in other words, is this a sort of “helper” system kind of like the helper axles on a dump truck) ? If so, where is the leverage gained for tension as the arbor is stationary.
2.) As I imagine that the answer to Q 1. is more than likely “NO”, I anticipate a full belt change. What is the best V-belt that I can use to optimize running “smoothness” ?
3.) Am I limited to only a V-belt ? I am wondering if I could use round belts or link-belts in order to gain the smoothest operation with the least likelyhood of ever slipping (if they ever even could) and the least perpensity to deformation ( which plauges the V-belt design) ?
4.) I recently bought a Link belt just to try it on another machine and I really liked it, but it seemed as if It may not provide the same level of grip as a v-belt due to the observation that it did not fully engage the full inner profile of the pulley. Is this observation correct?
5.) It would make sense to me also that, If the pulleys are not in perfect alignment with each other ( i.e. drive pulley running slightly left or right of the arbor pulley) the belt may settle and wear in a non-symmetrical fashion which I would think would make their stretching during this settling process non-uniform ( leaving me with belts with the same “uniform tension” issue that I am sharing currently.
6.) Seeing that I love to tinker and I have capability of machining, I considered the idea if removing the v-belt pulleys and replacing them either with machined cogged belt pulleys and Flat cogged belts (like the timing belts on most cars) or machined v-ribbed pulleys and belts (like the serpentine belts in most cars).
7.) Has anyone experimented with any of the afore-mentioned ideas. If so, which one did you try and what were your results?
I would be interested in putting a link-belt setup on this tri-pulley system as they run like butter, but I’m having second thoughts on longevity and moreover concerned that these belts may not be designed to withstand and correctly distribute the tension and torque that this saw is built to produce, and am looking to define the best “tradeoff” between quality of performance and the length of time that quality performance is sustained.Thanks in advance for the help!