New Wheels for Power Stands or Pro Planer

[dusty]

Thank you, Everett. You did a lot of research and found items of interest that I was not able to find (even though I was in Sheppard documents).

The clincher that tells me that these are going to work perfectly on the ProPlaner is the "mounting height" of 2 3/4". That is withing 1/8" of what I measure from the bottom of the plunger to the floor with the legs resting on the floor (zero elevation).

Yes, I expect these to be "plug and play" when they arrive on Thursday of Friday.

This coupled with the increased load rating makes them a perfect fit. With no quantity discount I purchased four at $6.82 ea plus $15.64 shipping. I placed the order on Sunday and received notification today that they were in shipping. The UPS tracker says they are in transit (whatever that means).

I can now see two Power Stands the Crafters Station with new wheels.

[jsburger]

Dusty,

I put together a sheet for you for that Shepherd 2" Caster C0020273ZN-POL01(KK))

I used Shepherd's site and CAD tools to extract something that may help folks see how the numbering and ordering specs go together and visualize the construction.

One of the things I think the 2" Shepherd unit has over the 50 year old OEM caster is the Rig (the Fork, Horn or Yoke) as some refer to them has a short offset swivel lead, that is the distance from the the vertical centerline of the kingpin (stem) and the axle.

Without the wider caster and the main load bearing which the OEM did not have, this new caster will make it far easier to initiate the swivel, and far harder to bend the Rig (Yoke) as we have seen through the years.

Better still, it is a 2" Caster and may not require any of the modifications the 3" caster upgrade does, plus I do agree it is likely to fit in Power Stands and Pro Planer Stands.

I can hardly wait til you post pictures!

Thanks for starting this thread!

Everett
Shepherd Casters Part Number C0020273ZN-POL01(KK)) for Dusty.pdf

Are not all SS castors the same? The only difference in the part number is due to the spacers needed for the install on the power stands or in the case of the stand alone scroll saw the adapters to fit the legs.

[everettdavis]

John,

Dusty started out asking if anyone had done the 3" upgrade. Obvious that those are different size.

The smaller casters were steel and then hard rubber so there are two types there.

I have seen as many as 3 yoke types on them. (Slightly different profiles).

Can I say they were all OEM Shopsmith and not an aftermarket mixed in? No.

I can't even confirm that MAGNA West Coast and East in Ohio used the same brand of caster, sourced locally back in the day.

I don't know enough for certain to say what was what, but they weren't the same through the years.

This latest discussion is more slanted to far wider caster sets of the same height allowing them to be inserted without having to raise the bolt holes for the assembly height, allowing modern 3rd Party Shepherd casters to slide in with no modifications.

Were all the grip ring stem lengths always the same? I don't know the answer to that on OEM casters between 10E / 10ER / Mark 5/ Mark V/ Professional Planer Stands / Crafters Stations/ and Power Stands. I just don't know enough to say definitively.

Everett

[dusty]

I am assuming the SS caster in your pix was of fairly recent vintage.

The photo is of an old 2" caster along side a newer 3" caster. The 3" caster is not ball shaped but the stem is shorter thus does not bottom out in the bore.

Older casters have a 'ball' end.

The piston bore has a corresponding round shaped bottom.

The Mark VII pistons have a bad trait of cracking/splitting.

I consider that to be the result the caster protruding out of the lower end on the piston as shown in your pix.(BTW I believe the caster is dropped down about 1/16" and is not inserted fully into the piston bore in your pix)

The stem is longer than the bore is deep. It can't do anything other than protrude.

So if the stem is shorter, the washer fix makes sense.(lowers the wheel)

Since the 'current' casters do not have the ball end(at least they do not look so in the pix), I think a shorter stem is preferred.

I be describing older pistons above re the bore end.

I am amazed the planer casters have stems that are too long. All of the Shopsmith 2" casters that I have have the longer stem. I suspect the same cause as some deficient motor belts a while back.

My comments are highlighted.

[dusty]

As you know, I have new wheels. I will have two types soon. I have two sets of the 3" upgrade casters and I have a set of 2" casters inbound.

Now that I have come to realize that the 2" casters will work on the Shorty as well as the ProPlaner (where they were ordered for), I have to decide.

I am not equipped to redrill for the 3" upgrade because I am packed for the move and (I am curious as too how well these new casters might work on the Shorty.

Then if I decide to utilize the 2" caster throughout, I will have two sets of 3" casters (and the associated modifications) to deal with.

[jsburger]

John,

Dusty started out asking if anyone had done the 3" upgrade. Obvious that those are different size.

The smaller casters were steel and then hard rubber so there are two types there.

I have seen as many as 3 yoke types on them. (Slightly different profiles).

Can I say they were all OEM Shopsmith and not an aftermarket mixed in? No.

I can't even confirm that MAGNA West Coast and East in Ohio used the same brand of caster, sourced locally back in the day.

I don't know enough for certain to say what was what, but they weren't the same through the years.

This latest discussion is more slanted to far wider caster sets of the same height allowing them to be inserted without having to raise the bolt holes for the assembly height, allowing modern 3rd Party Shepherd casters to slide in with no modifications.

Were all the grip ring stem lengths always the same? I don't know the answer to that on OEM casters between 10E / 10ER / Mark 5/ Mark V/ Professional Planer Stands / Crafters Stations/ and Power Stands. I just don't know enough to say definitively.

Everett

I guess I didn't state that properly. My bad. When I used the word castor I was referring to the complete assembly. I realize there are minor differences over the years. However, they are functionally the same and interchangeable are they not?

[everettdavis]

I found a number of caster vendors who answer the stem length question with the same answer.

How does it work?
The Grip Ring is just that. It Grips the sides of the tube when it is inserted. Also called an Expansion Ring or Friction Ring, the ring compresses as it is inserted into the tube. It is the friction of the ring against the side of the tube that holds the caster onto the chair. The position of the ring within the tube does not matter. It does not line up with a slot or groove. It is the friction that holds it on. This is why a shorter stem can be used as a replacement. If your stem is longer than 7/8" ( the typical length of a replacement stem ) our caster will work fine. The only important thing is that the depth of the hole be at least as deep as the "Length of the Stem" so that the stem does not bottom out in the hole. You can use a pencil to stick into the hole to check the depth.

Clearly the caster should not protrude as some we have seen are.

Were some holes not machined deep enough?
Were some casters bought incorrectly?

The hole can't be too deep, only too shallow based on what the vendors are saying.

Everett

[dusty]

John,

Dusty started out asking if anyone had done the 3" upgrade. Obvious that those are different size.

The smaller casters were steel and then hard rubber so there are two types there.

I have seen as many as 3 yoke types on them. (Slightly different profiles).

Can I say they were all OEM Shopsmith and not an aftermarket mixed in? No.

I can't even confirm that MAGNA West Coast and East in Ohio used the same brand of caster, sourced locally back in the day.

I don't know enough for certain to say what was what, but they weren't the same through the years.

This latest discussion is more slanted to far wider caster sets of the same height allowing them to be inserted without having to raise the bolt holes for the assembly height, allowing modern 3rd Party Shepherd casters to slide in with no modifications.

Were all the grip ring stem lengths always the same? I don't know the answer to that on OEM casters between 10E / 10ER / Mark 5/ Mark V/ Professional Planer Stands / Crafters Stations/ and Power Stands. I just don't know enough to say definitively.

Everett

I guess I didn't state that properly. My bad. When I used the word castor I was referring to the complete assembly. I realize there are minor differences over the years. However, they are functionally the same and interchangeable are they not?

Yes, it is fair to say they are functionally the same but since I have NO Magna equipment I remain skeptical about agreeing that they are interchangeable. Having said that let me say that the hole pattern, orientation and specific locations (with respect to one another and the floor) are all the same for the Power Stands, Mark V and Crafters Station are the same.

If you want/need to perform a caster upgrade (to 3" castors) the redrilling instructions would be the same for all of them. I unpacked my POD today just so that I would know that. Now for putting it all back.

[JPG]

I found a number of caster vendors who answer the stem length question with the same answer.

How does it work?
The Grip Ring is just that. It Grips the sides of the tube when it is inserted. Also called an Expansion Ring or Friction Ring, the ring compresses as it is inserted into the tube. It is the friction of the ring against the side of the tube that holds the caster onto the chair. The position of the ring within the tube does not matter. It does not line up with a slot or groove. It is the friction that holds it on. This is why a shorter stem can be used as a replacement. If your stem is longer than 7/8" ( the typical length of a replacement stem ) our caster will work fine. The only important thing is that the depth of the hole be at least as deep as the "Length of the Stem" so that the stem does not bottom out in the hole. You can use a pencil to stick into the hole to check the depth.

Clearly the caster should not protrude as some we have seen are.

Were some holes not machined deep enough?
Were some casters bought incorrectly?

The hole can't be too deep, only too shallow based on what the vendors are saying.

Everett

I take the 'vendor' statement with a grain of salt. I do not think it applies to the SS casters.

As for 'ALL' SS caters, be advised the Mark VII caster stems and pistons are different from all the others. I do consider all the other SS casters to be interchangable. Yes the "10" pistons are different from the Mark 5/V.

[jsburger]

I found a number of caster vendors who answer the stem length question with the same answer.

How does it work?
The Grip Ring is just that. It Grips the sides of the tube when it is inserted. Also called an Expansion Ring or Friction Ring, the ring compresses as it is inserted into the tube. It is the friction of the ring against the side of the tube that holds the caster onto the chair. The position of the ring within the tube does not matter. It does not line up with a slot or groove. It is the friction that holds it on. This is why a shorter stem can be used as a replacement. If your stem is longer than 7/8" ( the typical length of a replacement stem ) our caster will work fine. The only important thing is that the depth of the hole be at least as deep as the "Length of the Stem" so that the stem does not bottom out in the hole. You can use a pencil to stick into the hole to check the depth.

Clearly the caster should not protrude as some we have seen are.

Were some holes not machined deep enough?
Were some casters bought incorrectly?

The hole can't be too deep, only too shallow based on what the vendors are saying.

Everett

I take the 'vendor' statement with a grain of salt. I do not think it applies to the SS casters.

As for 'ALL' SS caters, be advised the Mark VII caster stems and pistons are different from all the others. I do consider all the other SS casters to be interchangable. Yes the "10" pistons are different from the Mark 5/V.

As do I. Since almost all SS castors (MK VII excepted) have fundamentally the same wheel assembly, as in the stem longer than the piston bore and a rounded stem end, it seems to me they are designed that way. It is the pivot point for the castor wheel. The rounded end provides a smaller contact area, thus less friction than the piston end on top of the wheel bracket.

Of course I guess Magna/Shopsmith could have been doing it wrong for 70+ years.