![]() ![]() Gear cutters are the tools used for the fabrication of gear wheels to cut the teeth in the wheels. Joking aside, I think they fell victim to the CNC revolution, like so many other manufacturers of high quality manual machines.How To Select Involute Gear Cutter By encomvidown1983 Follow | Public Maybe all this could be done on a Menziken M220? Hint, hint. (differential division is the mechanical principle behind an universal dividing head: with each rotation of the crank, the reference point moves backwards ((or forwards)) by the “differential amount” to allow the circle to be divided by a prime number, for example, without using a prime number hole circle plate ). This would allow for helical cutters as long as the differential per rev is a function of the helix angle. And you only need one for all the gears, regardless of # of teeth.Īnother thing, if the drive train to the cam was via a planetary, one could drive the ring gear “slower“ than the planet carrier and get a differential function. ![]() Gear hobs have straight flanks - eliminating the need to try and approximate the involute curve. Furthermore, if the cam drive was via a telescoping cardan shaft, one could use the lathe carriage and set up a desired Module or DP and make a gear hob. This way, one could make cutters of various sizes & relief angles. The cam profile would control the relief profile and the stroke length. ![]() I would need the cam to rotate at the number of cutter teeth per one spindle rev. I am contemplating using the taper attachment mechanism (mostly the telescoping leadscrew) via a timed cam to move the cross slide. The number of “reliefs” per rev is a function of the number of teeth the cutter has. ![]() Traditional relieving lathes are the opposite: the tool moves on the X-axis and the work rotates concentrically with the lathe’s Z-axis. The basic principle of the EUREKA attachment is to have a stationary tool and the work “lobes” in and out of the cut. I think the modern cog belts / wheels have proven to be very reliable, just look at all the timing belts out there. The change gear method is the traditional way - there is no possibility of getting “out of sync” because of the gear teeth. ![]()
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