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Homemade Gear Cutter Arbor
Glenn Wegman on chaski.org
Homemade gear cutter arbor fabricated from 4140 pre-hard bar. Threaded to accept a 3/16" 16TPI nut. Key is a 1/4" pin reduced to fit the 6mm keyway. Mandrel will be held in a 75TG collet in an NMTB 30 vertical mill.
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