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HelicopterMain Discussion › Radial Bearings on Motor question
08-02-2011 12:04 AM  6 years agoPost 1
Heli-on

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Southern Cali, CA - USA

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Is it okay to use radial bearings that have neoprene gasket type seals on them as replacement main motor bearings?

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08-02-2011 12:20 AM  6 years agoPost 2
ShuRugal

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Killeen, TX

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if the bearing is rated for the RPM, load, and temperatures your motor operates at, then it should work fine whether it is sealed or not.

AMA 700159

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08-02-2011 03:17 PM  6 years agoPost 3
Heli-on

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Thanks for the reply.

I'm not too sure how to read these specs. I'm looking to use these on a Neu motor on a 600: http://www.vxb.com/page/bearings/PROD/kit970 The Neu is rated to 60,000 RPM, so are these no good? All it says in the spec is Grease Lubrication 28,000 RPM. Any idea what the GL means?

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

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Vermont

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It means that there is usually a choice between lube. For grease, it's rated at 28k, for oil it would be more, if they have that option. I would say without even looking at it you need to find something better.
I've had good luck with the boca orange seal bearings. Made specifically for brushless motors.

-Tim

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08-02-2011 04:07 PM  6 years agoPost 5
Heli 770

rrProfessor

USA.

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Grease normally slows bearing speed down 40%.

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08-02-2011 04:21 PM  6 years agoPost 6
Heli-on

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Thanks guys. I'm going to give these a shot. The motor is using an 11T pinion and main gear is 170T. So, ratio is 170/11 = 15.5. Target Headspeed is 2100, so I'm thinking the motor should only be seeing 2100*15.5 = 32550 RPM.

The ceramics are over $30 a pop for this motor. I've gotten over 400 flights on the factory bearings, so I don't think ceramics are necessary.

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08-03-2011 12:55 AM  6 years agoPost 7
ShuRugal

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Killeen, TX

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If it were my bird, i would want more safety factor than 1.16

But that's just me.

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HelicopterMain Discussion › Radial Bearings on Motor question
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