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Posted: Wed Sep 21, 2011 9:22 am
by wiredone
I can only hope not!
Maybe I should post a thread about an install.
Posted: Wed Sep 21, 2011 1:06 pm
by JPG
wiredone wrote:I can only hope not!
Maybe I should post a thread about an install.
Do 'make it so'!
Posted: Wed Sep 21, 2011 3:40 pm
by wiredone
Okay, just pulled the trigger on these.
http://www.ebay.com/itm/150385619475?ss ... 1423.l2649
I looked all around and these seem to be the best bang for the buck.
Load rating of 125 pounds per wheel should be plenty.
Less than $28.00 delivered.
When I get them I'll do an install thread with pics and directions for the
correct drilling pattern.
Posted: Wed Sep 21, 2011 3:43 pm
by wiredone
bigal1948 wrote:I got the new 3 inch casters from shopsmith today and the move the machine around fine. I did notice however that the template they provided doesn't quite get it off the ground on the first stop and it is only about a quoarter inch of the ground in the next position. That is fine for me with a relatively smooth garage floor but I think I would see about moving things down a bit if you needed a higher lift.
They would probably appreciate some input about this.
Posted: Wed Sep 21, 2011 5:56 pm
by damagi
I ended up picking up some casters from my local casters place (only 3 or 4 miles from my house, so thats nice). They were $7.50 each, so $32.85 with tax. My shopsmith ones should arrive early next week, so I will have those for comparison. Here is a photo of the casters from my local place next to the original SS one:
[ATTACH]14386[/ATTACH]
These are 3" Polyurethane/Polyolefin with 'precision bearings'. I am sure if i went with ones without bearings they would be a bit cheaper.
Don't know if I will get to installation before my other ones get here. The baseline assumption would be to move the holes 1/2" higher (ie: the increase in the radius of the wheels.
Posted: Wed Sep 21, 2011 7:04 pm
by damagi
Interestingly enough, on closer inspection there is more to the positioning than just the difference in the wheel size. The original casters are 1 15/16" long, but don't stick in all the way.
[ATTACH]14387[/ATTACH]
[ATTACH]14388[/ATTACH]
[ATTACH]14389[/ATTACH]
My replacements are 1 3/8" for the stem...so 9/16" shorter. I went back and inspected the
photos on the shopsmith page, and it appears that theirs are probably 1 3/8" as well. I think the ones I found are identical except for the color (simply an issue of what was in stock).
So, what does this mean? Well, it means that we need to compensate. Measuring from the edge of the socket where the wheels attach, it looks like the old wheels have their axis 1 5/8" down, whereas the new wheels are 2 1/2" lower.
Posted: Wed Sep 21, 2011 9:31 pm
by JPG
Y'all just had to get me off my ... and go do some measuring!;)
SS stem 7/16 x 1 5/8 with tension ring at 1 1/4 above 'swivel base' / e-bay stem 7/16 x 1 15/16 with ring ????????
Swivel base 2 3/8" above 'floor' / 3 3/4" above floor.
SS caster 'socket' is .460d x 1.6+- deep. Smooth bore(no detent for ring)
My conclusion is the ss caster set will need to be raised on the leg 1 11/16" more above the floor. That is a vertical dimension, not along the sloped side of the leg. [3.75 - 2.375 + 1.937 - 1.625 = 1.687 = 1 11/16]
This is for the e-bay item mentioned above by Wiredone.
I pulled the trigger for two sets!
Posted: Wed Sep 21, 2011 9:40 pm
by JPG
damagi wrote:Interestingly enough, on closer inspection there is more to the positioning than just the difference in the wheel size. The original casters are 1 15/16" long, but don't stick in all the way.
[ATTACH]14387[/ATTACH]
[ATTACH]14388[/ATTACH]
[ATTACH]14389[/ATTACH]
My replacements are 1 3/8" for the stem...so 9/16" shorter. I went back and inspected the
photos on the shopsmith page, and it appears that theirs are probably 1 3/8" as well. I think the ones I found are identical except for the color (simply an issue of what was in stock).
So, what does this mean? Well, it means that we need to compensate. Measuring from the edge of the socket where the wheels attach, it looks like the old wheels have their axis 1 5/8" down, whereas the new wheels are 2 1/2" lower.
If your new casters have a 1 3/8" stem they will go all the way in and the base of the stem will rest against the bottom of the piston. As you mentioned the SS originals bottom out in the piston
bore. That introduces a
negative height gain.
All that is left is the difference in the floor to the stem base dimensions.
Posted: Wed Sep 21, 2011 11:09 pm
by pennview
To double check the math on this before drilling any new holes, why not measure the height of the legs above the floor with the original casters at the two "up" positions, and then install the new casters and take similar measurements. Then you can calculate where to drill the holes to remount the brackets based on how much lift you want. Just ensure that there is ample room for the casters to be raised above the bottom of the legs when the legs are in the down position.
Posted: Wed Sep 21, 2011 11:49 pm
by paulmcohen
I would have assumed that if I purchased them from Shopsmith they would have done the math and provided a template that works, otherwise I can go to my local caster wholesaler (3 miles from my house) and get them cheaper and without shipping.
