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JR NES 3021 servos

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Old 11-14-2007, 02:00 AM
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tommy s
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Default JR NES 3021 servos

Danny,

I just aquired two NIB JR NES 3021 servos and would like to know
the specs on them, torque, type of gears, etc.
They must not be currently manufactured as I can't seem to find any information on them.

Thanks
tommy s
Old 11-14-2007, 05:26 AM
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Mac_Man_UK
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Default RE: JR NES 3021 servos

NES3021.. size 26.5 x x15 x 33 mm, Weight 26 gms, Torque 3Kg/cm, Speed 0.22s Mini precision servo, Coreless, double ball raced.
Old 11-14-2007, 09:06 AM
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tommy s
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Default RE: JR NES 3021 servos

Thanks Mac Man,

You'll have to excuse me as I sometimes don't understand proper English, how does 3Kg/cm
convert to in/oz of torque ?

Can you tell me if they have metal or nylon gears ?

tommy s
Old 11-14-2007, 09:26 AM
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Default RE: JR NES 3021 servos

tommys - from a chart that I got when I asked Danny about it, this is what I found:

3021 Mini, Light Weight N/A 1.22" x .581" x 1.75" .84 ounces 37.6 oz-in .22 sec/60ΒΊ Dual Nylon Coreless Electric Cars, Electric Helis, Gliders, small pylon aircraft


I still use several of them, and they're nylon gears. At least they were when I replaced a set earlier this year due to some crash damage.
Old 11-14-2007, 09:47 AM
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Default RE: JR NES 3021 servos

Still are plastic/nylon gears.

Old 11-14-2007, 09:58 AM
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tommy s
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Default RE: JR NES 3021 servos

Thanks guys,

I appreciate the info .

tommy s
Old 06-12-2017, 06:09 PM
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Default Voltage for Life battery 6.6 v?

Can these be used with a 2s Life battery safely?

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