Best material for a motor shaft sleeve?

[brewdexta]

The motor on my mill had been swapped out for a bigger motor and the original pulley had been bored out. I have refurbished the original motor and want to put the original 3 way pulley back on. There is not enough meat in the pulley to use a taperlock bush so will be turning a sleeve, wall thickness will be approx 4mm.

Looking at the size of the old and the new they are probably 5/8" (circa 15.9mm) and 15/16" (circa 23.7mm) respectively and it needs to be just over 2" long. The mill motor/pulley is identical to

I will be cutting 2 key-ways in the sleeve and one in the pulley, not the full 2" and opposite sides of the sleeve. There is a grub screw in the smaller pulley.

I have both brass and aluminium rod handy, but will have to buy in some steel. If ali or brass is no good, what grade of steel is better for turning/boring?

Cheers
Andy

 

[ronan]

leaded mild steel ? if more strength is needed en 8.

 

[Lawnmowerboy]

EN1A leaded (purple bar end) Will do it. I wouldn't have thought you'd gain anything out of using EN8. Very rarely will the keys try and shear, The belt should always slip first.

 

[brewdexta]

Thanks guys, I've ordered a some EN1A and will give it a go with that

Cutting the key-ways will be fun however I've searched the site and found a few tips including using a parting tool and a stationary chuck, should be fun....

Cheers
Andy

 

[Lawnmowerboy]

Yep, but use a HSS tool as carbide will chip and it cuts on a radius and is also radded on the corners. Stick it in low range and wind back and forth and wind on about 10 thou a time.