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Old 11-16-2016, 01:34 PM   #16 (permalink)
samwichse
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20KG Metal Gear High Torque Wide Angle Digital Waterproof Servo for RC Robot PZ | eBay

Claims 20kg force on a 1cm arm. Derate by 50% and double the arm length and you're still looking at 5kg, that should be enough, right?

Waterproof, all metal geartrain, works on 5v. $14.89 + $8 shipping

Also:
Towerpro MG958 55g 20KG High Torque Digital Metal Gear Servo | eBay

20kg, metal gear, not waterproof, $14.83, free shipping

Lots of pretty cheap options on ebay for servos nowadays.
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