wheels for tools

[royalton10]

I am looking to put some wheels on Craftman radial arm saw that is at least 20 years old. I cannot find my book but a new comparable one is 204 pounds. If I put on 4 wheels do they each need to be rated for 204 pounds, or is it 204/4 or about 50 pounds per wheel?

Thanks!

 

[Dale B]

I'm thinking it's 4 fifty pounders... Make 'em tall so they will move over obstuctions. little wheels jam on everything .......

 

[LeonardY]

To determine the wheel capacity required for an application, divide the total load by the number of wheels. Each wheel must be able to support the resulting load capacity under operating conditions.

If your looking for a copy of your manual.

Try here.

http://vintagemachinery.org/mfgindex/detail.aspx?id=222&tab=3

Hope this helps.

 

[Kenneth3]

PortAmate rolling bases are great for cabinets, radial arm saws, tables saws, and especially parts washers. They are on sale at Sears right now locally, but not sure about everywhere else.

 

[Kenneth3]

BTW they are rated to 400lbs.

 

[king nero]

To determine the wheel capacity required for an application, divide the total load by the number of wheels. Each wheel must be able to support the resulting load capacity under operating conditions.

Hope this helps.

Nope, four wheels => each wheel must be able to take at least 1/3 of the total weight: there are always (under most conditions at least) three points in contact with the floor.

 

[Torque1st]

Take the wheel 'ratings' with a grain of salt. For name brand casters I use a 50% rating factor. For HF wheels etc I use a 25% factor.

For normal conditions divide the load by the number of wheels. For rough service divide the load by 1/2 of the number of wheels.

Using these derating factors you will avoid flat spotting, short caster life, and have easy movement.

 

[billybudge]

I am looking to put some wheels on Craftman radial arm saw that is at least 20 years old. I cannot find my book but a new comparable one is 204 pounds. If I put on 4 wheels do they each need to be rated for 204 pounds, or is it 204/4 or about 50 pounds per wheel?

Thanks!

Hi. There is an old fashioned way in engineering, basically, if you have an object of 204 lbs, the wheel ratio must be 204 lbs, each wheel should be able to hold the full weight of the load, this will in the long run . less maintanence, and good durability,the wheel is doing what it is designed and spec to do,
wheel strength is measured mainly with axle load weight,
personally, if it is for myself, I just go for the ones that will do the job, however if it is for a client, then full spec, weight to load bearing ratios, etc
cheers

 

[diggerrick]

Don't ASSume the weight is equally distributed on all four wheels. As suggested above, I also size casters based on two carrying the load.

Good quality casters have a safety factor already built in, but I use the imported stuff also, and de-rate them.

 

[royalton10]

Thanks for all of the replies and help.

I looked at the Sears unit mentioned above, it was $40 on sale, normally it is $70. However the Sears store was out of stock and said it could not be ordered without additional shipping cost.

I ended up at Menards and bought 2" 80 pound rated casters, each with a brake. Casters, nuts, washers, etc came to $23. They are installed and work fine and I saved some money.

I was trying to figure out how to get the unit off the floor to remove the old adjustable bolts. Then it hit me to use the floor jack. So I put a scrap piece of wood under the saw, a scrap on top of the floor jack. I jacked it up and got the casters installed very quickly. The beauty of that idea was scrap wood and not cuts needed.

Thanks again!