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Gening D541BB digital nano servo. This is a tiny but powerful 5g nano-sized servo normally used in the Crack Yak Mini and many of our other light-weight indoor foamies. Similar to the Hitec HS40 with very slightly different dimensions.

For full servo specifications, please refer to the specification tab above. A list of similar servos is also shown, where available, and is based on torque values only. All of our servos include standard manufacturers fittings.

Please note, as we buy our servos in bulk, many of the analogue Hitec servos are shipped to us packed like this, individual servos may therefore arrive loose-packed. Please do not grab and rotate servo arms by hand – this is not good for the gears and with todays light-weight servos can easily strip gears. A servo tester is a worthwhile investment.

Servos similar to the Gening D541BB Digital Nano Servo

Torque in kg·cm
Servo 4.8V 6.0V 7.4V Weight Price Stock
 Gening D541BB Digital Nano Servo (This one) 0.70 0.80 - 5.0g $6.75
 TowerPro SG50 Digital 5g Micro Servo 0.60 - - 5.0g $4.26
 TowerPro SG51R Digital 5g Micro Servo 0.60 0.80 - 5.0g $4.59
 HS-40 Nano Nylon Gear Servo 0.60 0.75 - 5.0g $9.67

Technical Details for Gening D541BB Digital Nano Servo

Torque @ 4.8V (kg·cm)0.7
Torque @ 6.0V (kg·cm)0.8
Torque @ 7.4V (kg·cm)-
Speed0.09/60 @ 4.8V
Bearing TypeTop Ball Bearing
Motor TypeCoreless
Dimensions (mm)19x19.5x8
Weight5.0g (0.2oz.)

Fantastic Servo
5/5 stars
By Gary H
I've been using these for rudder/elevator on a light weight indoor freestyle model and I'm super impressed with both the speed and centering. I was somewhat sceptical of the longevity, but after 6 months regular flying they've been absolutely faultless. Thoroughly recommended.

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