ve stems to valve head. The stem projects within the countersunk portionof the head and after welding, the projecting piece of stem and the flux when fused fill the entire countersunk portion.5—Rough grinding the valve head to take off the hard scale after welding. 6—First machine operation which… … 8—Eight-headed machine for slotting the stems of valves for overhead valve engines. 9—Enlarged view of one ofthe heads on stem slotting machine. B—Connecting rod bars for establishing reciprocating motion of heads. C—Ratchetand pawl feed for table. 10—Grinding the valve seat on a Star wheel. This…
Automobiles · Aeronautics
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