Drill a very small pilot hole in the set screw, stepping up drill sizes to cut the screw out. Use fluid, have spare bits.
A thin cut-off wheel in an angle grinder is quick too. Make a gauge to avoid over cutting. Get close, then split the coupling off to keep the shaft sano. The depth gauge is key here, so the remaining coupling metal is thin as possible.
I spent hours trying to drill out and pull a coupling off a Cal 2-27 not long ago. After breaking my puller, I cut the coupling off. Compared to the hours of drilling and struggle, the angle grinder took less than three minutes. A replacement coupling was about $100, good to know before committing the original to scrap!
Arby
From: danbollinger <no_reply@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Saturday, June 22, 2013 7:13 PM
Subject: [Electric Boats] Re: Electric Ericson 27 Long Beach California
Set screws are harder than most drill bits, so drilling it out's not going to work. Is the shaft keyed? If so, then heating the coupling will cause it to expand and at the same time relieve the pressure from the set screw (which typically presses on the key, not the shaft), and you might be able to remove it off with a pulley puller.
Or, cut the shaft behind the coupler and attach the motor with a new coupler.
--- In electricboats@yahoogroups.com, "jonathanheirendt" <jonathanheirendt@...> wrote:
>
>
> Yeah, I was afraid of that. I will be bringing my grinder too just in case the heat does not do the trick. There appears to be a rusty set screw through the coupling but I can't get it to move. Will I have to drill this out prior to heating and pulling or can I just try to take the whole assembly off with the set screw still attached? By the way does anybody know what size shaft packing I will need? 1974 Ericson 27 3/4" shaft. All help is very much appreciated.
> Thanks,
> Jonathan
>
Or, cut the shaft behind the coupler and attach the motor with a new coupler.
--- In electricboats@yahoogroups.com, "jonathanheirendt" <jonathanheirendt@...> wrote:
>
>
> Yeah, I was afraid of that. I will be bringing my grinder too just in case the heat does not do the trick. There appears to be a rusty set screw through the coupling but I can't get it to move. Will I have to drill this out prior to heating and pulling or can I just try to take the whole assembly off with the set screw still attached? By the way does anybody know what size shaft packing I will need? 1974 Ericson 27 3/4" shaft. All help is very much appreciated.
> Thanks,
> Jonathan
>
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