This simplifies the equation to (CS x 7)/L in inches = number of strokes. Delta shaper accessories, For two-speed heavy duty wood shaper, High-speed steel 3-lip shaper cutters Delta 43-424 User Manual. Some people reduce the constant factors 3/5 x 12 = 7.2 and round to 7. Cutting Speed 70 (fpm) Diameter of Cutter 0.500 Although you have calculated the RPM, remember that this is only a recommendation. Calculate the RPM setting to perform this drilling operation. A 0.50 drill is being used to drill a piece of 1018 steel with a brinnel hardness of 200. So 60sft/(9/12ft) x 3/5 =48 strokes/minute. Use the recommended cutting speed charts in Table 3. Say your work piece is 8' wide, then the actual stroke will be close to 9'. So if, e g, you are happy cutting structural steel bar (A36) at 60 sfm, then 60sfm/(stroke length in ft) x 3/5 = number of strokes per minute to set the machine.ĭon't forget to allow for overtravel of the ram at each end. On a crank shaper, about 3/5 of the stroke is spent cutting and 2/5 on retracting. Cutting forces are influenced by the geometry of the tool, but generally tend to lift the ram on the cutting stroke, as well. Well since you have two spindle speeds, 8,000 and 10,000 RPM that yields the following results.

The is a slight tipping effect since the ram acts well above the center of mass of the rest of the shaper however the shaper is shaped so that in use is does not actually tip with respect to the work. Then, because the geometry of the crank linkage is such that the backstroke is faster than the cutting stroke, the rest of the shaper lurches forward when the ram retracts. Feed Rate: The rate at which the user is moving Origin across the workpiece. Spindle Speed: The rotational speed of your cutter. Plunge Speed: The rate at which your cutter makes initial contact with your material. Actually, as the ram move forward, the rest of the shaper moves backwards (action/reaction). These variables include: Auto Speed: The rate at which your cutter moves in the (x,y) plane when Auto Mode is engaged.

Shaper speeds chart