Deckel SO being a single lip cutter does not easily grind end-mils. However it is a precision machine possessing all the capabilities to do it.
I've made a simple attachment just to do this. It is along the conventional pattern for endmill grinder with little extra precision adjustments.The two micrometers can be set to previously determined values for mill diameter (the horizontal) and the angle of primary and secondary bevels (the vertical with the spindle ground to a taper). The sliding parts are made out of A2 and with close tolerances to minimize any side play.
The grinder rotation is reversed for this procedure - it is easy with the 3 phase VFD I am using to drive the motor.
The face of the endmill is ground using the SO standard spindle set at 180 degrees and tilted to the required angle of the primary and secondary bevels. The spindle can be indexed for two, three, four and six flutes.
By the way, I've added a simple microscope that allows examining of the ground point. It is a black anodized aluminum tube with a microscope eyepiece (I have an eyepiece reticle that allows measurements as well). For the objective I've used a "D" lens from an old 8 mm movie camera.
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I've made a simple attachment just to do this. It is along the conventional pattern for endmill grinder with little extra precision adjustments.The two micrometers can be set to previously determined values for mill diameter (the horizontal) and the angle of primary and secondary bevels (the vertical with the spindle ground to a taper). The sliding parts are made out of A2 and with close tolerances to minimize any side play.
The grinder rotation is reversed for this procedure - it is easy with the 3 phase VFD I am using to drive the motor.
The face of the endmill is ground using the SO standard spindle set at 180 degrees and tilted to the required angle of the primary and secondary bevels. The spindle can be indexed for two, three, four and six flutes.
By the way, I've added a simple microscope that allows examining of the ground point. It is a black anodized aluminum tube with a microscope eyepiece (I have an eyepiece reticle that allows measurements as well). For the objective I've used a "D" lens from an old 8 mm movie camera.