Lets build a jackshaft

[Tony Wells]

Here's a handy chart that may help:

http://www.freetechnicalcharts.com/media/band_saw_speed_chart_steel.pdf

 

[Weldfab]

I had to do pretty much the same thing on a bandsaw I bought a while back. Its was for woodworking and liked the 24" throat but was way to fast for cutting metal unless it was very thin gauge. Did a lot of calculations and achieved my goal of slowing it down to meet my needs. Can't remember all the specifics but it works great. They say a picture is worth a thousand words so here's a few thousand.

 

[rock_breaker]

Metalmaster's idea would take up the least space if you could make a two groove pulley that would use 2 ball bearings in it. Otherwise I would mount 2 flange mount bearings on either side of the 1/2 inch plate you mentioned.

Ray

 

[snowplow]

Here's a handy chart that may help:http://www.freetechnicalcharts.com/media/band_saw_speed_chart_steel.pdf

Thanks for the chart. Stupid question here, is mild steel low carbon steel? If so 300 fpm reduced by 40% = 180 rpm. Do you guys run your saws there? People keep telling me to run 80 fpm. Maybe that's just so l can cut anything?

 

[Tony Wells]

it's generally accepted that mild steel contains <0.25% carbon, and that by itself classes it with low carbon steels. Be aware though that many other factors also control the characteristics of the metal, and some steels with that or less in C content are pretty tough to machine.


And be careful not to confuse SFM and RPM.

 

[Tony Wells]

722.3272 sfm

 

[snowplow]

And be careful not to confuse SFM and RPM.

Sorry l meant fpm. My phone auto corrects to rpm.l dont know what 722.3272 means. Maybe its not viewing correctly on my phone?