john davidson 1 Posted April 18, 2021 Share Posted April 18, 2021 I am part way through converting an HHM Chandelle which had an Irvine 61 to electric, I have built a cage to carry the 5s battery with the motor mount immediately in front but the motor shaft sticks out behind into the battery space by about 20mm . It is a substantial shaft, 8mm and will take a bit of cutting , too much for a dremel, Considering whether to use an angle grinder with the motor wrapped up to protect from swarf or is there another option, any ideas chaps? Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted April 18, 2021 Share Posted April 18, 2021 Junior or full size hacksaw, its not like the shaft is made of anything hard! Could put a little grease on the shaft/motor housing behind the masking tape so you can wipe it off once you have cut through the shaft. Or take the shaft out, cut it/clean it and put it back, I have had some just held in with a grub screw and other that have used Loctite everywhere and been very difficult to get apart. PS the bearings normally have shields to stop the grease getting out...which generally stops muck getting in. Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted April 18, 2021 Share Posted April 18, 2021 It's the magnets that you want to keep the swarf off more than the bearings, which as Chris says are normally shielded. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted April 18, 2021 Share Posted April 18, 2021 If a hacksaw will cut it, a Dremel will cut it. More watts in a Dremel than in your arm. I would consider. If you could live wish a shaft stub, protruding, 5mm?, you could shield the motor with polythene and masking tape, mount the motor as needed, and cut away. Square off with abrasive as needed. But you need a stub, so the tape has a stick point to keep debris out. Debris in motor is never good. Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted April 18, 2021 Share Posted April 18, 2021 What about using the motor the other way round, and get a prop adapter for the shaft at the front. ? D.D. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted April 18, 2021 Share Posted April 18, 2021 (edited) Thinking a bit more, you could shrink wrap the polythene shielding to the shaft. That will allow a shorter shaft stub.. Edited April 18, 2021 by Don Fry Idiotic spelling Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted April 18, 2021 Author Share Posted April 18, 2021 Thanks for the input guys, I should perhaps have said that the motor shaft is threaded as in ic so not reversible, will get up nerve tomorrow to cut, quite a dear motor so so dont want to muff it Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted April 18, 2021 Share Posted April 18, 2021 I meant turn the whole motor round and mount it from the front, is that not possible at all John.? I am worrying about balance after you cut the shaft. Good luck whatever you decide to do Matey. ? D.D. Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted April 18, 2021 Author Share Posted April 18, 2021 Thanks for the input guys, I should perhaps have said that the motor shaft is threaded as in ic so not reversible, will get up nerve tomorrow to cut, quite a dear motor so so dont want to muff it Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted April 18, 2021 Author Share Posted April 18, 2021 DD- threaded prop driver in front and plain shaft behind so that is the bit protruding into the battery space Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted April 18, 2021 Share Posted April 18, 2021 Gotcha, so no choice but to cut !! Go steady then Dood. D.D. Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted April 18, 2021 Share Posted April 18, 2021 John, Use a Dremel multi tool rather than a hacksaw. Just wrap the rest of the motor to prevent swarf getting stuck on the magnets. I've done this myself and I recommend the Dremel method with a good quality cutting disc it will put much less stress into the motor. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted April 18, 2021 Share Posted April 18, 2021 +1 for the Dremel, motor in a plastic bag, disc it off. Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted April 18, 2021 Share Posted April 18, 2021 +1 more for the Dremel with a thin cut off wheel. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted April 18, 2021 Share Posted April 18, 2021 Dremel. This is why you bought it. Quote Link to comment Share on other sites More sharing options...
kc Posted April 19, 2021 Share Posted April 19, 2021 8mm shaft sounds like quite a chunky motor! Does that model really need a large motor and masses of power? Original Howard Metcalf adverts from 1996 say the Chandelle is " very graceful " and suggest 45 to 60 two strokes so the Irvine 61 seems top end of that range anyway. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted April 19, 2021 Share Posted April 19, 2021 Small angle grinder with thin (1.5mm) cut off disk, protecting motor as others have said. Quote Link to comment Share on other sites More sharing options...
Tim Ballinger Posted April 19, 2021 Share Posted April 19, 2021 I have, in the past, thought of cutting the excess rear motor shaft but decided to live with it as after enquiring of the manufacturer I was told it would invalidate the warranty. If it’s an expensive new motor something to consider. Tim Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted April 19, 2021 Share Posted April 19, 2021 If you are going to cut it, I reckon that these will do the job - a great addition to the standard Dremel or similar. The "Dremel EZ SpeedClic" disks and mandrel are available as a set or separately. https://www.amazon.co.uk/Dremel-EZ406-02-Mandrel-Cutting-Starter/dp/B000FBLRVA/ref=sr_1_17?crid=3SFAK47UG3JVX&dchild=1&keywords=dremel+ez+speedclic&qid=1618857175&sprefix=dremel+ez%2Caps%2C157&sr=8-17 Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted April 19, 2021 Author Share Posted April 19, 2021 Well, the deed was done this morning with a hacksaw, it is a chunky motor, a Grand Turbo GT4030/02 to give its full title, bought several years ago as a bargain special from the net, may have been the site which merged with Robotbirds. The HMM Chandelle was a freebie from a mate and I flew it briefly maybe fifteen years ago with the Irvine 61 but the aileron servo failed in on my first flight with it and damaged a wing so it has languished in the depths of the shed. It had been stored for quite a few years before I got it so that must be why the servo failed . The Irvine 61 seems in good condition if anyone wants it for the cost of carriage. Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted April 21, 2021 Share Posted April 21, 2021 On 19/04/2021 at 21:47, john davidson 1 said: Well, the deed was done this morning with a hacksaw, it is a chunky motor, a Grand Turbo GT4030/02 to give its full title, bought several years ago as a bargain special from the net, may have been the site which merged with Robotbirds. The HMM Chandelle was a freebie from a mate and I flew it briefly maybe fifteen years ago with the Irvine 61 but the aileron servo failed in on my first flight with it and damaged a wing so it has languished in the depths of the shed. It had been stored for quite a few years before I got it so that must be why the servo failed . The Irvine 61 seems in good condition if anyone wants it for the cost of carriage. PM sent. Andy. Quote Link to comment Share on other sites More sharing options...
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