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beeg wrote:ARCretired wrote:Would be if the SS weighed a lot more - but the design is fairly weight efficient. I couldn't do that with a lot of stand-alone equipment.
Might help ya if you move the headstock all the way to the right end. Then lift the left end over the transition crack. Move the headstock all the way to the left end,Then lift the right end over the transition crack.
This does not answer your specific question but it shows the dimensions that I have taken "from the template" that came with my latest set of 3" casters. It is my belief that Shopsmith would tell us that the 1 23/32" dimensions are really supposed to be 1 3/4" while the 2 15/32" separation is supposed to be 2 1/2". This would make the 4 3/16" measurement 4 1/4". Nice round numbers.JPG wrote:I am curious what the c-c distance is between the two sets of holes in the power pro model. i.e. the distance above the lowest hole is to the next one up.(c-c)ARCretired wrote:I should have mentioned that the alternative holes for the caster upgrade were already drilled by SS in my PowerPro machine. I still needed to add washers to maximize the lift for the best clearance to the floor with the caster upgrade. Having a slightly different hole location would have eliminated the need for spacers, however I suspect that the tolerances involved mean the hole locations can't be optimum for every assembly.
As far as the cam and mechanism design, the reason the cam has 3 locations is probably due to the foot operated lever actuation. 120 deg (3 positions in a full rotation) is as far as could reasonably be utilized in the available space and to have a lever reachable by foot in all three positions. The force required to actuate the pedal (if there were only 2 locations at 180 deg apart - an UP and DOWN) would likely be too great, unless the arms were longer - again too much space is required, and accessibility probably wouldn't work. Other types of mechanisms would probably be more complex - say a rack & ratcheting pinion. The SS design is clever, we just have to deal with the tolerance adjustment, or careful hole location if you drill them. And even larger casters with more clearance will still not roll over every obstacle. So fairly clean floors are a good habit anyway.
When I roll my SS out of the garage and into the driveway during warm weather, I have to lift each end for a few inches so the rollers won't fall into the transition crack. not too big a deal. Would be if the SS weighed a lot more - but the design is fairly weight efficient. I couldn't do that with a lot of stand-alone equipment.
BTW the lobes and the foot pedal 'levers' are not 120° apart. Closer t0 90 90 180.
robinson46176 wrote:beeg wrote:ARCretired wrote:Would be if the SS weighed a lot more - but the design is fairly weight efficient. I couldn't do that with a lot of stand-alone equipment.
dusty wrote:I have never been certain that I was getting the same lift characteristics as were others here on the forum. Today I approached this just a little bit different than I have done before.
All this amounts to is the same sort of measurement with a different reference point. I have trouble getting up off of the floor these days so I avoid tasks that necessitate I get down there. I can't see how far the legs lifts off the floor! I can see a straight edge resting on top of the Way Tubes.
The top of the Way Tubes on my machine measure 23 3/16" above the floor when the legs are on the floor. One click up from there puts the top of the Way Tubes at 23 5/16". This is 1/8" up from the at rest position. I think this is consistent with reports by others and with the instruction sheet that came with the new casters. I did not do this according to the instruction sheet because Shopsmith tells me to turn the Mark V upside down (legs pointing up). No way is that happening.
One more click up puts the top of the Way Tubes at 23 1/2". I did this three times to confirm my numbers. The last time I turned on all available lights in the shop area just to make sure I was reading it right. Can't see like I used to either. This is a 3/16" rise from "one click". That is 1/16" different than others report. Since this is primarily the result of the lift cam, I stopped at that point. Besides, it is 1/16" higher than expected. If it had been lower, I would have thought "worn cam".
At any rate, one click up allows me to move the machine around the shop and it drags only occasionally on my less than flat floor. Two clicks up and I have to be careful that it does not roll away from me.
When I get to the new house (where ever that is), I hope the floor is not only flat but also level. This house originally had a car port and the floor was intentionally sloped. We converted it to a garage (then my shop) without doing anything to the floor. The houses that we are looking at to buy all have garages and I hope flat, nearly level floors.
Any way that you can get the legs up off of the floor far enough to allow the caster assembly to be removed from the legs will work. I have a trash barrel that slides under the Bench Tubes of a Shopsmith setting on its legs. A bottle jack on top of the barrel allows me to use a bottle jack to lift the Way Tubes. That done, I just remove the caster assembly and begin the redrilling process.Ed in Tampa wrote:dusty wrote:I have never been certain that I was getting the same lift characteristics as were others here on the forum. Today I approached this just a little bit different than I have done before.
All this amounts to is the same sort of measurement with a different reference point. I have trouble getting up off of the floor these days so I avoid tasks that necessitate I get down there. I can't see how far the legs lifts off the floor! I can see a straight edge resting on top of the Way Tubes.
The top of the Way Tubes on my machine measure 23 3/16" above the floor when the legs are on the floor. One click up from there puts the top of the Way Tubes at 23 5/16". This is 1/8" up from the at rest position. I think this is consistent with reports by others and with the instruction sheet that came with the new casters. I did not do this according to the instruction sheet because Shopsmith tells me to turn the Mark V upside down (legs pointing up). No way is that happening.
One more click up puts the top of the Way Tubes at 23 1/2". I did this three times to confirm my numbers. The last time I turned on all available lights in the shop area just to make sure I was reading it right. Can't see like I used to either. This is a 3/16" rise from "one click". That is 1/16" different than others report. Since this is primarily the result of the lift cam, I stopped at that point. Besides, it is 1/16" higher than expected. If it had been lower, I would have thought "worn cam".
At any rate, one click up allows me to move the machine around the shop and it drags only occasionally on my less than flat floor. Two clicks up and I have to be careful that it does not roll away from me.
When I get to the new house (where ever that is), I hope the floor is not only flat but also level. This house originally had a car port and the floor was intentionally sloped. We converted it to a garage (then my shop) without doing anything to the floor. The houses that we are looking at to buy all have garages and I hope flat, nearly level floors.
Dusty like you I try not to get down on the floor. I got casters fro Christmas and trying to decide how to do the installation. How do you do your?
It gives one a bit more room to work in. The caster assembly is quite well fitted into the legs.JPG wrote:How does lifting the way tubes help caster removal/replacement/drilling holes?
