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KST X12-508 Micro Digital Metal Gear Servo

Low Price: $36.00
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The KST X12-508 Micro Digital Servo is an ideal choice for Cyclic applications on 325-420mm helicopters that use micro servos such as the Align T-Rex 450, T-Rex 470L, MSH Protos 380, SAB Goblin 380, and Goblin 420 helicopters. Additionally these can be used in other R/C applications which are correctly sized dimensionally, and offer the correct torque/speed ratings when needed. 


  • Micro size aluminum case
  • Full metal gears
  • Dual ball bearings
  • HV compatible
  • Lightning fast
  • Coreless motor 

Operating Voltage: 
Size: 23x12x27.5mm 
Torque: @ 6.0V; @ 8.4V 
Speed: 0.09sec/60 @ 6.0V; 0.07sec/60 @ 8.4V 
Weight: 20g 
Working Frequency: 1520us/333Hz, 800us - 2200us 
Motor: Coreless 
Ball Bearing: 2BB 

This product was added to our catalog on October 4, 2017

Verified Owner
Thursday, Jan 10 2019 (8 months ago)
KST X12-508 Micro Digital Metal Gear Servo
I ordered 3 of these servos to replace the stock servos on my Align Trex 470. Within the first 4 flights the servos developed slope and play in the gears that would give me issues on the pitch for the main blades. The KST are rock solid, no play at all. Highly recommended.