greek "pi" in cutting speed formula of gear shaper similar to Lorenz LS400

Nov 29, 2003 1 Replies

dear sirs



can anyone explain why greek *pi* is present in the cutting speed formula of the gear shaping machine, while the cutter takes a reciprocatory movement (not a circular movement). this confusion has been breaking my head for a long time.



formula for cutting speed = pi * stroke length * no. of strokes



looking forward for a quick answer from you



with advanced thanks



Natarajan Ayyavu


A formula that just used strokes per minute and stroke length would give you average speed. Pi looks like some finagle factor to give you peak cutting speed.

Dick

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