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Re: V-belt replacement
Posted: Sun Mar 03, 2019 3:03 pm
by roneg
Thanks JPG.
Re: V-belt replacement
Posted: Sun Mar 03, 2019 10:54 pm
by beeg
Also when your playing around with the motor sheaves , DO KNOT let go of the sheave so they slam into the motor
sheave. It will cause other problems.
Re: V-belt replacement
Posted: Mon Mar 04, 2019 12:08 am
by roneg
Great tip beeg!
Ron
Re: V-belt replacement
Posted: Mon Mar 04, 2019 9:42 am
by dusty
Someone in this thread stated: "Assuming you have the right belt"
This triggered by curiousity.
(doesn't take much to do that)
I measured the four motor belts that I have for the Shopsmith. They were all purchased from Shopsmith but at different times. Two are marked with a Shopsmith part number. One is labeled Perelli and one is totally unidentied (no markings).
The one with no markings I purchased from Shopsmith to have as a spare. I suspect that this was during a time that Shopsmith experienced a quality control issue with a manufacturer. I understand from conversation here on the forum that that manufacturer has been dropped from the approved vendor list (just rumor and supposition).
My only point. A comparison of the physical profiles of these four belts.
- Motor Belt Profiles
- Motor Belt Profiles.png (13.97 KiB) Viewed 16337 times
The horizontal line in each profile is the fiber line that has been mentioned. Location seems to be random.
Re: V-belt replacement
Posted: Mon Mar 04, 2019 9:58 am
by JPG
I also am curious. What are the markings on the obviously larger profile belt and and what is it's width at the widest(top)?
ORRR what are the top width dimensions on those marked.(and what the marking is)
Can I correctly assume they are not all 'new'.
Interesting asymmetry.
Re: V-belt replacement
Posted: Mon Mar 04, 2019 2:17 pm
by dusty
JPG wrote:I also am curious. What are the markings on the obviously larger profile belt and and what is it's width at the widest(top)?
ORRR what are the top width dimensions on those marked.(and what the marking is)
Can I correctly assume they are not all 'new'.
Interesting asymmetry.
I think this will answer all your questions. The Perelli came out of the Shorty when it was being reconditioned. The unidentified is new and came from Shopsmith. One of the two with SS P/Ns is new. The other is like new but was in my go to machine. The OD of the unidentified is 1/8" shorter than the others which all measure 26 3/4".
- Motor Belts
- Motor Belts.png (35.71 KiB) Viewed 16315 times
Re: V-belt replacement
Posted: Mon Mar 04, 2019 5:40 pm
by JPG
dusty wrote:JPG wrote: . . . The OD of the unidentified is 1/8" shorter than the others which all measure 26 3/4".
Thank You!
????
Re: V-belt replacement
Posted: Wed Mar 06, 2019 11:58 am
by roneg
https://s.amsu.ng/RJkoersxAqsN
I've installed the new belt. I see what appears to be a problem. The belt rides against the waytube! It can be seen in Pic 3 best.
Re: V-belt replacement
Posted: Wed Mar 06, 2019 4:26 pm
by dusty
roneg wrote:https://s.amsu.ng/RJkoersxAqsN
I've installed the new belt. I see what appears to be a problem. The belt rides against the waytube! It can be seen in Pic 3 best.
Yes, I can see your concern. It is hard to tell from photo images but it looks to me as though the motor hangs off to one side more that the other.
With the belt cover removed and the headstock in horizontal (saw) position, I would check to see that the three shafts (quill, idler, motor) are all three inline. Just drop a plumbline down from the center of the quill shaft. It should center on the motor shaft.
If you check the belt at midrange (speed) does it make a difference?
Re: V-belt replacement
Posted: Wed Mar 06, 2019 8:43 pm
by roneg