Schedule a Meeting · Talk to a real woodworker: +1 937-890-5197 · 8:00AM – 4:30PM ET

Events Forum Live Demo

V-belt replacement

roneg

Thanks JPG.

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.

roneg

Great tip beeg!

Ron

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.

The horizontal line in each profile is the fiber line that has been mentioned. Location seems to be random.

Motor Belt Profiles.png

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.

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.png

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!

????

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.

dusty

roneg wrotehttps://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?

roneg

It's hard to get a good perspective on three shafts. But I was able to tell the motor is off slightly. Honestly..I don't know how everyone's doesn't get this way. From what I can tell the only solid mounting point is the this sheet-metal shroud? I can take a 1x1 , and lodge it on the left side of the wat tube , and the right side of the motor shaft and get the motor ,and shroud to move to the left 1/4 to 3/8 inches! There must be a way to adjust this, but I've yet to find a mention of it. Any good ideas? Also in the process of learning tug and push while clinching a flashlight in my mouth..I striped the gears on the speed-dial handle! So I'll be either ordering one from SS or using the guy on fleebay that rebuilds them. Any thoughts?

reible

You have an older headstock then I'm use to but I'm guessing there are a few things I would look at starting with the mounting of the motor. Perhaps it is time to drop the pan and motor and see if anything looks out of place. Maybe something bent or holes enlarged, screws loose, anything at all that would cause it to be that misaligned.

I'd go to the guy on ebay, heard only good things about his job.

Ed

JPG

I think the motor pan is bent out of shape and the major cause.I no longer think that

I also think the belt is contributing to the propensity to rub(non oem-slightly wider-slightly longer).

A new(used) motor pan may correct.Not needed

dusty

Looking at the very last image posted leads me to say the motor is not properly oriented in the motor pan. I'd "loosen" the four screws that secure the motor in the pan the then check to see if you can move the motor around so as to achieve alignment of the shafts.

Good luck. Hope you can avoid buying parts. 🙁 Save that money for tools. 🙂

Just to give you a different perspective:

Nothing is specifically identified. Prepared for my own needs. You will have to use your imagination.

The dashed lines forming a triangle mark the path that the belt would be on.

Shaft and Tube Relationships CORRECTED COPY no reference lines.png

wa2crk

The pictures with the plumb line tell all. It is possible that the end bells of the motor were installed improperly by a previous owner. Check the motor mounts to make sure that the correct ones are used and that the motor "feet" are properly orientated.

Bill V

roneg

Thanks all for your input. Thinking back.. The person I bought this machine from 2 years ago mentioned that his Dad did, or had done, a Motor rebuilt in the past. So yea, anything is possible here. I have noticed the motor plug and wire is not original. It is longer and of a flat type, with no grommet, at the pan entry point. Looks like a motor removal is in my future. :rolleyes:

wa2crk wroteThe pictures with the plumb line tell all. It is possible that the end bells of the motor were installed improperly by a previous owner. Check the motor mounts to make sure that the correct ones are used and that the motor "feet" are properly orientated.

Bill V

By end bells, I suppose you mean the metal ends at each end of the motor housing? The one shown in the last two pictures.

roneg

Dis-mounted the motor, and assy. The pan does not appear bent (the belt cover fits snug all the way around), the motor mounts seem to me normal. Don't know the normal distance between the waytube, and belt (not in any diagram I've seen). I'm thinking of installing a couple of split washers between the pan, and motor mounts to "wedge" it over the direction it needs to go, then screwing in down with new longer screws. Good idea?

Couple of things I noticed, with the parts exposed upon motor removal. The switch wires have been coming in contact with some moving object (rubed through insulation)..I'm guessing Main belt. Is there some diagram, or routing..wire clip, or suggestions? Also since there is no color coding on my motor wires, and none on the pig tail what is the proper way to wire the (new switch), to motor? I will be installing a new/used pigtail with quick dis-connect connectors Blk, Wht, Grn also.

Thanks,

Ron

dusty

That being the case, I'd like to hear about what you see if you rehang that plumb bob. What are the dimensions from the string to the tubes. Whatever the distance is should be the same. That is, the plumb bob should hang straight down the center line.

Shaft and Tube Relationship with Plumb Bob.png

JPG

I would be interested in a pix of the bottom of the motor pan showing the motor mounting screws.

BTW I recommend adjusting the eccentric the other direction to tighten the poly-v belt.(from 6 to 9 rather than 6 to 3)

JPG

Never mind!

I tore into my vintage specific(sorta*) "A" headstock and found the following.

The motor IS off set towards the operator side by about 5/16"(a straight edge laid against the operator side of the main and idler shafts intersects the center of the motor shaft).

The v belt is riding slightly above the outer rim of the motor pulley at "fast".

The belt clears the way tube by about 1/4".

*The main and idler shaft are poly-v.

*However the motor has been spaced up off the motor pan by 1/4" to allow using a stock 26" belt. I do not think that affects the other details significantly although it may decrease the offset(standard belt would be further off set very slightly).

Does not explain a belt rubbing the tube, but does clear up the offset is 'normal'.

roneg

Very interesting JPG. So it would appear the mis aleighnment is normal. However I'm confused how the belt can help but rub when running at high position on the motor sheve.

« Previous Page Next Page »