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Rave ENV 700 › Motor mount spacers
04-08-2011 01:13 PM  6 years agoPost 1
AnneThe Man

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Ireland

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Sorry another silly question, but just want to be sure.
I'm using the Kontronic Pyro 700 with helical gears and will probably have to use a motor mount spacer.
Can someone confirm the spacer goes between the motor and the electric motor mount, and not between the motor mount and counter bearing support?
Thanks

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04-08-2011 01:25 PM  6 years agoPost 2
Taipan

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Sydney, Australia

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The spacer goes inbetween the motor & electric motor mount.

The spacer & 2nd one it comes with are only needed if you can't get the pinion aligned with the main gear.

Btw did you get the Pyro with a long enough shaft to fit the counerbearing? For some reason the Pyro LS motors used to have approx 38mm shafts & this has now been reduced to 30mm. I have the 30mm one, too short to fit my ENV. Rather reluctuant to cut down the shaft & fit the extension bit that comes with the ENV. A single piece long shaft is way better as the extension bit will just spin in the pinion & make a mess. It won't be as secure either.

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04-08-2011 01:48 PM  6 years agoPost 3
AnneThe Man

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I bought the long shaft, so it's plenty long enough, 38.5mm?
The problem is that without the spacer there is probably only enough space for a 0.5mm gap top and bottom of the pinion, ie between the gear and the motor and the gear and the bearing in the counter bearing support. I know the helical gear shouldn't move, and if it does it will move more anyway, but it looks too close for comfort.
Is there a good reason for not using blue loctite on the 2 long bolts that hold the counter bearing support on to the motor?

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04-08-2011 02:02 PM  6 years agoPost 4
Taipan

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Not sure what you mean.

I've never loctited the motor bolts & use the star washers as in the manual. No probs.

Maybe if using Scorpion motors they get hot enough to melt the loctite?

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04-08-2011 02:09 PM  6 years agoPost 5
AnneThe Man

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Ireland

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I hope that was a joke!

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04-08-2011 02:11 PM  6 years agoPost 6
AnneThe Man

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Ireland

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Are you using the helical pinion? I know the RevCo straight cut pinions are considerably shorter than the helical CY one.

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04-08-2011 02:19 PM  6 years agoPost 7
Taipan

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Sydney, Australia

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Not joking. Nah, probably take a lot more heat than that to undo loctite. It does weaken with increasing temps.

I use a Scorpion 12T straight cut pinion, it's probably the same height as the NextD helical one. On a 4035-560 motor with 1 spacer & the pinion all the way onto the shaft (I even countersink/bevel the edge of the bore so it can slide on a little bit more)there is about 0.5mm gap between the pinion & counterbearing.

I even filled up this gap with the shims the kit comes with for the tail shaft. As one time the bearing moved out of the counterbearing & almost touched the pinion. The shims prevent this from happening - I did reloctite the bearing back into the CB.

I prefer Scorpion to Revco pinions as the teeth aren't as sharp & main gears last longer. However Scorpion only make 10, 11 & 12T so if need more than 12T, no choice but to use Revco. I.e the 4525LE needs 13T. Could use a wire brush wheel or something to smoothen the edges of the teeth on Revco.

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04-08-2011 02:30 PM  6 years agoPost 8
AnneThe Man

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Ireland

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That's sounds like a great idea. I'd rather not use a spacer unless I have to.
If I can find a couple of 6mm shims they will ensure the pinion can't hit the motor or the bearing if it was to come loose.
The CY helical is 1" long, the Revco straight cut is 21mm long.

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01-21-2012 09:16 AM  5 years agoPost 9
PetterS

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Gothenburg, Sweden

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Taipan quote:
Btw did you get the Pyro with a long enough shaft to fit the counterbearing? For some reason the Pyro LS motors used to have approx 38mm shafts & this has now been reduced to 30mm. I have the 30mm one, too short to fit my ENV.
I was thinking about this and finally understood what was happening. I had ordered a Pyro with L and got an engine with 30mm shaft. A few months later I noticed that the box said LS. Invoice said L so I had gotten the wrong engine.

Pyro L is 38mm and Pyro LS (length special) is 30mm.

BR
Petter

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01-22-2012 06:59 AM  5 years agoPost 10
Taipan

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Sydney, Australia

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That is strange! I thought LS obviously stood for 'long shaft.'

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01-22-2012 07:28 AM  5 years agoPost 11
PetterS

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Gothenburg, Sweden

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L is Long 38mm. LS is long special. 30.mm.

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