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View DirtyMike's profile

Table Saw Pulley Ratios?

by DirtyMike
posted 09-10-2016 12:38 AM


4 replies so far

View MrUnix's profile

MrUnix

7359 posts in 2559 days


#1 posted 09-10-2016 12:55 AM

If your existing motor is 1750 rpm and the pulley diameters you give are correct, then the arbor is only spinning at around 2300 rpm, which is really slow. Most 10” table saws run the blade around 4000-5000 rpm. If you put in a 3450 rpm motor and use the same pulley arrangement, it would get you around 4700 rpm. If you want to maintain the speed you currently have at the arbor, you would either need to reduce the motor pulley to half it’s current size (1.375”, which isn’t really feasible) or double the size of the arbor pulley.

Arbor speed calculator can be found here.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View DirtyMike's profile

DirtyMike

637 posts in 1262 days


#2 posted 09-10-2016 12:57 AM

Am i correct that a 3600 rpm motor with a 1:1 ratio with spin my blade 3600 rpms? will i notice much torque loss with a 1:1?

View DirtyMike's profile

DirtyMike

637 posts in 1262 days


#3 posted 09-10-2016 01:37 AM

Thanks brad. My arbor pulley is 2.25 inches and the motor pulley is 2.75 inches. Low blade rpm explains a lot of the trouble I have been experiencing.

View Woodknack's profile

Woodknack

12772 posts in 2740 days


#4 posted 09-10-2016 03:26 AM

Be careful of online pulley calculators. I tested a bunch a few years ago and some of them are inaccurate which is weird because the math is very simple.

-- Rick M, http://thewoodknack.blogspot.com/

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