MONITOR ‘BALL HOPPER’ HIT N MISS ENGINE
Part 3 - large crankshaft by Jason Ballamy
MONITOR ‘BALL HOPPER’ HIT N MISS ENGINE
Part 3 - large crankshaft by Jason Ballamy
The crankshaft started life as a rusty lump that had been flame cut from a piece of 1" hot rolled plate, there was some hard scale on the surface particularly the cut edge and by the time I had milled the four sides down to size I had three blunt corners on my 40mm indexable end mill.
Using a 1/4" split point stub drill the waste was stitch drilled away spacing the holes at 0.250" so they just joined together.
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Editor: David Carpenter