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Antique Gas Engine Discussion

repair of the 6 m igniter

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Old 06-10-2005, 04:03:39 PM
RHudson RHudson is offline
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Default repair of the 6 m igniter

well i thought i would check back in with information.

the "hammer" and hammer shaft apear to be one forging on my 6 hp IHC M. i chucked the shaft and drilled through the hammer in increasingly larger drills. i was hoping to drill out what i thought was a swaged on shaft. it is not. it apears to be a forging that was center drilled both ends and then the shaft was turned down between centers.

i turned down a new cold rolled shaft to a little oversize of the frame's ID's, then took repetative cuts until i could just slide the frame over the new shaft. (if i had a small align boring set up i would have rebored and bushed the frame). Next, the replacement shaft had a step turned down to shrink fit into the hammer that has been drill in the first machining experiment, above. i heated the hammer with a torch and pressed it onto the new shaft. a small pin may increase confidance in the assembly, but i think the shrink fit will be secure. hope to assemble with new springs this weekend. opinions or thoughts?
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Old 06-10-2005, 06:45:20 PM
Bill Miller Bill Miller is offline
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Default Re: repair of the 6 m igniter

My suggestion would be the pin. I have had the weld on one come loose and it came out like a bullit. Bill Miller
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Old 06-10-2005, 11:02:49 PM
Kevin O. Pulver Kevin O. Pulver is offline
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Default Re: repair of the 6 m igniter

rhudson, May I suggest that what you want to do is silver solder that piece.
It has the strength of brazing, but will flow between the parts like soft solder.
My machinest friend uses it all the time even for building crankshafts on model engines. Give it a try! Kevin
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