R-8 MILL SPINDLE

As our machine horsepower increased over the years and we created the really stable mill head design, we realized that the old Morse #3 spindle simply could no longer handle the cutting forces generated in milling.  The next logical step was to go to the R-8 spindle used by big machines like the Bridgeport style.  We had experience with some other import machines using R-8 spindles and found that many of them used a small round press-in style of key to hold the R-8 tooling.  End users found that this undersized  pin could shear off under heavy loads.  Our solution was to design a replaceable key that fit a full 1.125" along the keyway of the R-8 tooling.  Combined with our 1.5 horsepower motors and huge tapered roller bearings, the mill has all the cutting power you will need.  As an added bonus, if the key should ever become worn or damaged, it can be replaced for a few dollars, instead of replacing the entire spindle.