9" Band Saw

New production run 3-1-24

This speed reduction kit (shown in last photo) includes a machined aluminum 7" belt pulley wheel, 3 socket head mounting bolts and timing belt. The speed reduction kit has been designed for a Ryobi 9" band saw (model BS904G) and all other compatible models, such as Wen 3960, Central Machinery, Power Tec, Grizzly etc. that use a 62" saw blade and ~ 9.25" dia. blade wheel with blade speed of ~ 2568 ft/min. Note: your BS wheel spokes and timing belt with teeth should look like those shown in my photos. If you have any doubt about compatibility, please send me a message with your phone # or email so we can discuss. Note: the Ryobi model 903 can also be converted. Certain other models have flat spiral ribs on the band saw wheel with a single narrow rib on the center line. These models require either offsetting the drill hole against the side of the rib or milling the rib to provide a flat surface for the bolt head on the rib center line.

When trying to cut non-ferrous metal such as aluminum, brass, etc. the high blade speed results in excessive motor loading, cutting friction and heat build-up which will quickly wear out the saw blade and make it difficult to hold the metal stock by hand. Also, cutting plexiglass or other plastics at high speed will cause melting of the plastic at the cutting edge and binding of the blade. The speed reduction kit reduces the blade speed to  ~ 642ft/min (speed reduction of 4/1) which allows metal and plastic cutting to be practical and also provides 4 times available motor torque.

Photo 1 shows the speed reduction pulley mounted on the blade wheel (drilling dimensions for mounting bolt clearance holes will be provided with the kit). Note that the original pulley remains in place (shown in photo 2) allowing for a quick change to high speed operation using the original timing belt. Also Photo 4 shows the 7" pulley wheel mounted on a lathe for machining operations such as; truing up the OD, cutting the belt road bed, facing off pulley wheel sides and drilling and threading the three mounting holes.

Here are comments from my first buyer, ddankiw  "The reduction in speed works great, even when used with wood. i needed to slow the speed for more flexible tool use, with metal as well as wood. i'm just a home fabricator for my stuff and sometimes stumble on great ideas like yours"