Optimum RPM for 14'' bandsaw.

[bigbob2]

Recently changed the 1 HP.motor on my band saw for a larger 1.5 HP one both are 1400rpm. I do know the formula for determining rpm at the 14'' wheel, but mine is compounded due to the fact it has a multi step pulley on the driven idler shaft which in turn connects to another pulley on the axle of lower wheel. This defeats my ability to factor it into know equation for rpm ie; motor rpm x motor pulley dia/ driven pulley x wheel dia x PHi/ 12. the extra pulley on lower wheel axle throws me out.I believe optimum rpm for 14'' is 3200 rpm.I use a bimetal wood cutting 1/2''x 4 TPI blade.

[LittleBen]

I assume you are looking for fpm.

This link should help. Easier than explaining.
I believe this is the situation you're talking about.
 http://www.engineeringtoolbox.com/pulley-diameters-speeds-d_1620.html

Just remember this calculates the rotational speed of the last pulley, so you still need to factor in the bandsaw wheel diameter. So take n4 and multiply by ((wheel diameter * pi)/12) to get feet per minute.

[bigbob2]

yup, feet per minute, must be conditioned response saying rpm, and yup just what I'm looking for thanks Little Ben

[Roy from Pa]

Buy ah real bandsaw, Bobby Boy..  

[bigbob2]

That's enough from you, you turkey       strangler!    It is similar to the Grizzly

[Roy from Pa]

LOL

[Mad Max]

You can put bright orange on the side of the band saw blade in one spot and see if you  can count the revolutions in 15 seconds.
x 4 for revolutions per minute
Band saw length x 3.1416 x revolutions per min = feet per min.

my 2 cent

[Mad Max]

HIGHLAND WOODWORKING SAID  3000 feet per min.

The little square on the blue tap

  http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=125;t=013305;p=8#000114

[Roy from Pa]

Oh boy, now maxison can count orange dots?
Ya right. LOL

[bigbob2]

I have borrowed a rev counter [tachometer] to assess wheel revs and then I can find sfpm easily. thanks for all your input except the little leprechaun from PA Heh heh he he.LOL

[Roy from Pa]