Blade / Belt Speed???

It depends on the length of the blades. It's my understanding, you start with a maximum speed you want for the outside edge of the blade, and use that to figure out the rpm of spindle, then figure out relative pulley sizes so you get that spindle rpm with the speed you want to run your engine.

dave_r is on the right track.

A little more info.

Usually measured by tip speed. Meaning the speed, FPM or Feet Per Minute, at which the tip of the blade moves.

Use your favorite search engine and type: "tip speed mytractorforum.com", w/o the quotes, then hit enter.
It should come up with a few posts on MTF about tip speed and formulas to figure it out. And formulas for changing sheave sizes to get to where you want to be.

Also posts on figuring out tip speed for impellers on snow blowers.

There are limits on tip speed, don't go too high of a tip speed or things start to fly apart.

Did a quick measure and come up with 16 3/8 tip to tip. Will go and see what the formula makes of that.

Any idea why they tried to hide the part number?

Probably a generic part, that was resold as a oem-specific part for, um, slightly more.

Bang that number into google with "blade" and see what comes up.

dave_r said:

Probably a generic part, that was resold as a oem-specific part for, um, slightly more.

Bang that number into google with "blade" and see what comes up.

Click to expand...

Took the wire brush to the blade looks like 1757303...

Google says it's 16-1/2" blade but I measure it at 16-3/8"

Bad Wolf said:

Google says it's 16-1/2" blade but I measure it at 16-3/8"

Click to expand...

Measure corner to corner, not end to end. The blade cuts a circle and the center of each end is inside of that circle.

TUDOR said:

Measure corner to corner, not end to end. The blade cuts a circle and the center of each end is inside of that circle.

Click to expand...

That's a good point, never thought about that.