Servobox Series Model SN Planetary Reducer Gearboxes
Unit of Measure

Specifications

Brands

Pelonis Technologies

Model

120

Ratio

3

Output Bearing

Standard (Keyway)

Stage

1-Stage

Rated Output Torque (Nominal Output Torque) (T2N)

233 N·m

Maximum Acceleration Torque (T2B)

1.8 Times of Rated Output Torque

Maximum Output Torque (Emergency Stop Torque) (T2NOT)

3 Times of Rated Output Torque

Rated Input Speed (n1N)

3000 rpm

Maximum Input Speed (n1B)

5000 rpm

Backlash

≤ 8 arc·min

Torsional Rigidity

19 N·m/arc·min

Maximum Radial Force (F2rB)

5340 N

Maximum Axial Force (F2aB)

2670 N

S5 Cycle Operation Service Life (LH)

>30000 hours

S1 Continuous Operation Service Life (LH)

>15000 hours

Efficiency (η)

≥ 97 %

Operating Temperature

-25 to +90 ºC

Lubrication

Synthetic Grease

Protection Class

Ingress Protection (IP65)

Mounting Position

Any

Noise Level

≤ 63 dB

Weight

6.7 kg

Weight Tolerance (±)

2 %

Mass Moments of Inertia

1.62 kg·cm²

Dimensions

Dimension A1

108 mm

Dimension A2

M8 x P1.25

Dimension A3

32 mm

Dimension A4

90 mm

Dimension A5

10 mm

Dimension A6

M12 x P1.75

Dimension A7

10 mm

Dimension A8

35 mm

Dimension B1

122 mm

Dimension B2

70 mm

Dimension B3

50 mm

Dimension B4

58 mm

Dimension B5

9 mm

Dimension B6

211 mm221 mm

Dimension C1

115 mm145 mm165 mm

Dimension C2

M6 M8 M10

Dimension C3

24 mm28 mm32 mm

Dimension C4

67 mm77 mm

Dimension C5

95 mm110 mm130 mm

Dimension C6

M8 x P1.25

Dimension C7

122 mm130 mm150 mm

Features

Features

Helical Gear Design
The speed reduction mechanism employs helical gears and provides two times the meshing rate of teeth compared to regular spur gears. It also features extremely smooth operation, low noise, high torque output, and low backlash.

High Precision Gear Machining
Manufactured from high quality Ni-Cr-Mo alloy steel (SNCM220), precision machined and carbunzed to hardness 57-60 HRC. Precision teeth grinding ensures gear accuracy reaches DIN6 class.

Full Needle Roller Bearings Design
The planetary gear transmission employs full needle roller bearings without a retainer to increase the contact surface. This greatly improves structural rigidity and service life.

Integrated Planetary Arm Bracket
The planetary arm bracket and the output shaft are one-piece constructed to increase torsional rigidity and accuracy.

One-piece Gear Box and Advanced Surface Treatment
The gear box and the internal ring are one-piece constructed to achieve high rigidity and high torque.

Collet Locking Mechanism
The input-end and the motor are coupled through a collet locking mechanism. The mechanism is dynamically balanced to ensure concentricity and balance on the connection and has no backlash for power transmission while running at a high speed.