Graupner HBM 990 BB MG Brushless Digital Servo

The HBM 990 BB MG is a high speed HV brushless servo. The Graupner servo has a specially coated zero-backlash metal gear. The double ball-bearing output gear with the 25 toothing is suitable for the servo arms with item number 7908. This combination of servo arm and servo ensures positioning accuracy and high precision. For optimal cooling of the high-speed, high-performance engine, the housing is milled from aluminum and provided with stylish cooling fins.

The HBM 990 BB MG digital servo is particularly suitable for use on the tail rotor of helicopters. However, the Graupner servo can be used individually in model making, in flight models or RC car models.

The Graupner servo can be fine-tuned to your needs using the Servo Setup software. You can find the software in the Graupner updates or here in the download area.

product features

• Ideal for helicopters
• With high-quality silicone connection cable
• Specially coated metal gear
• Very fast and precise
• Full aluminum body
• Programmable

Included

Servo HBM 990 BB MG
standard aluminum servo arm (No. 7908.3)
mounting material

Recommended accessories

• Servo arm aluminum 25 T 35 mm U (No. 7908.35)
• Servo arm aluminum 25 T 35 mm U (No. 7908.35)
• Servo arm aluminum 25 T 45 mm U (No. 7908.45)
• Servo arm aluminum 25 T 55 mm U (No. 7908.55)
• Servo arm aluminum 25 T 1 06 mm D (No. 7908.106)
• Servo arm aluminum 25 T 25 mm (No. 7908.3)
• Servo arm aluminum 25 T 50 mm D (No. 7908.4)
• Servo arm aluminum 25 T 40 mm (No. 7908.5)
• Servo arm aluminum 25 T 55 mm (No. 7908.6)
• Servo arm aluminum 25 T 90 mm D (No. 7908.7)
• Servo arm aluminum 25 T 10 5mm D (No.7908.8)

Technical data
Width [mm]: 20 mm
Height [mm]: 39.4 mm
Actuating time 6.0V approx. [sec / 40°]: 0.039 sec/40°
Weight approx.: 76 g
Actuating time 7.4V approx. [sec / 40°]: 0.028 sec/40°
Actuating torque 6.0V approx. [Ncm]: 85 Ncm
Length [mm]: 40 mm Actuating
torque 7.4V approx. [Ncm]: 98 Ncm
Bearing: 2 ball bearings
Transmission: Metal
Brushless: Yes
High Voltage: Yes
Servo type: digital
Servo series: HBM servo
length [in]: 1.5 in
torque 6.0V approx. [kg.cm]: 8.7 kg.cm
torque 7.4V approx. [kg.cm]: 10 kg.cm
Actuating torque 7.4V approx. [oz.in]: 138 oz.in
Height [in]: 1.55 in
Actuating torque 6.0 approx. [oz.in]: 121 oz.in
Width [in]: 0.8 in