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Two 40 watt light bulbs control heat and light, I use this to warm up the bottles of epoxy prior to mixing, one is switched with the 12 RPM gear motor, the other is independant of the gear motor, all shafts are driven by 1/5 pitch gear motor pulleys and belts, sized like to retain the RPM speed of the motor..
After trying many different swivels, I have settled on large comercial swivels, (the ones used on Tuna hand lines) I've tried numerous ones, these have 3 season on them without failure, I store them in a jar of 20 WT motor oil in the off season to keep them running smoothly..
Adjustment is achieved by a length of 3/8 treaded rod threaded through threaded plates ( "C" ring plates, bought from plumbing or electrical supply housed) the end of the shaft has been tapped and a 10/32 eye bolt is loc-tighted threaded in place... linkage is supplied by different lengths of jack chain , I keep brass wire on hand to make odd sized links for plugs like dartes or hand carved that dont have the clearance for a ful link of jack chain...
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