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Home / Products Centre / Stepper Motor / Geared Stepper Motor / High Precision Planetary Gearbox Stepper Motor

High Precision Planetary Gearbox Stepper Motor

What is planetary gearbox?

A high precision planetary gearbox is an essential component in various industrial applications, offering superior torque transmission, efficiency, and compact design. These gearboxes are widely used in robotics, automation, aerospace, and medical equipment due to their ability to provide high torque density, minimal backlash, and exceptional positioning accuracy. In this article, we will delve into the key aspects of high precision planetary gearboxes, their advantages, applications, and selection criteria.
 

How to Choose the Right High Precision Planetary Gearbox？

When selecting a planetary gearbox, consider the following factors:

1. Load and Torque Requirements

Determine the maximum torque your application requires and choose a gearbox that can handle peak loads without performance degradation.

2. Gear Ratio Selection

Select an appropriate gear ratio based on the speed reduction or torque amplification needed for your specific application.

3. Backlash and Precision Needs

For applications demanding high positioning accuracy, opt for gearboxes with ultra-low backlash.

4. Durability and Material Composition

Ensure the gearbox is constructed from high-strength materials, such as hardened steel or advanced composites, to maximize longevity and performance.

5. Mounting and Size Constraints

Evaluate the available space in your system and select a compact gearbox that fits within your design limitations while maintaining performance.

nema 17 stepper motor with planetary gearbox (6)

NEMA 17 Hybrid Stepper Motor with BF-HPR42 / HPS42 Series High Precision Planetary Gearbox

Stepper motor, high torque, low noise, smooth type, step angle: 1.8° or 0.9°, NEMA17, 42x42mm
Planetary Gearbox Head: HPR-Round Head / HPS-Square Head
Gear Ratio: 1 Stage: 4/5/10:1
2 Stage: 20/25/50/100:1
Optional: Lead-wires, gearbox, encoder, brake, integrated drivers...
Model Step Angle Phase Shaft Wires Body Length Shaft Dia Shaft Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / / (L)mm mm  mm A Ω mH N.cm No. g.cm2 Kg
BF42HS25-0404-HPR42-L 1.8 2 Round Lead wire 25 5 10 0.4 24 36 15 4 20 0.15
BF42HS25-0404-HPR42-LSW 1.8 2 Round Lead wire 25 5 24 0.4 24 36 15 4 20 0.15
BF42HS25-0404-HPS42-L 1.8 2 Round Lead wire 25 5 10 0.4 24 36 15 4 20 0.15
BF42HS25-0404-HPS42-LSW 1.8 2 Round Lead wire 25 5 24 0.4 24 36 15 4 20 0.15
BF42HS28-0504-HPR42-L 1.8 2 Round Lead wire 28 5 10 0.5 20 21 18 4 24 0.22
BF42HS28-0504-HPR42-LSW 1.8 2 Round Lead wire 28 5 24 0.5 20 21 18 4 24 0.22
BF42HS28-0504-HPS42-L 1.8 2 Round Lead wire 28 5 10 0.5 20 21 18 4 24 0.22
BF42HS28-0504-HPS42-LSW 1.8 2 Round Lead wire 28 5 24 0.5 20 21 18 4 24 0.22
BF42HS34-1334-HPR42-L 1.8 2 Round Lead wire 34 5 10 1.33 2.1 2.5 26 4 34 0.22
BF42HS34-1334-HPR42-LSW 1.8 2 Round Lead wire 34 5 24 1.33 2.1 2.5 26 4 34 0.22
BF42HS34-1334-HPS42-L 1.8 2 Round Lead wire 34 5 10 1.33 2.1 2.5 26 4 34 0.22
BF42HS34-1334-HPS42-LSW 1.8 2 Round Lead wire 34 5 24 1.33 2.1 2.5 26 4 34 0.22
BF42HS34-0956-HPR42-L 1.8 2 Round Lead wire 34 5 10 0.95 4.2 2.5 22 6 34 0.22
BF42HS34-0956-HPR42-LSW 1.8 2 Round Lead wire 34 5 24 0.95 4.2 2.5 22 6 34 0.22
BF42HS34-0956-HPS42-L 1.8 2 Round Lead wire 34 5 10 0.95 4.2 2.5 22 6 34 0.22
BF42HS34-0956-HPS42-LSW 1.8 2 Round Lead wire 34 5 24 0.95 4.2 2.5 22 6 34 0.22
BF42HS40-1206-HPR42-L 1.8 2 Round Lead wire 40 5 10 1.2 3 2.7 32 6 54 0.28
BF42HS40-1206-HPR42-LSW 1.8 2 Round Lead wire 40 5 24 1.2 3 2.7 32 6 54 0.28
BF42HS40-1206-HPS42-L 1.8 2 Round Lead wire 40 5 10 1.2 3 2.7 32 6 54 0.28
BF42HS40-1206-HPS42-LSW 1.8 2 Round Lead wire 40 5 24 1.2 3 2.7 32 6 54 0.28
BF42HS40-1704-HPR42-L 1.8 2 Round Lead wire 40 5 10 1.7 1.5 2.3 42 4 54 0.28
BF42HS40-1704-HPR42-LSW 1.8 2 Round Lead wire 40 5 24 1.7 1.5 2.3 42 4 54 0.28
BF42HS40-1704-HPS42-L 1.8 2 Round Lead wire 40 5 10 1.7 1.5 2.3 42 4 54 0.28
BF42HS40-1704-HPS42-LSW 1.8 2 Round Lead wire 40 5 24 1.7 1.5 2.3 42 4 54 0.28
BF42HS48-1206-HPR42-L 1.8 2 Round Lead wire 48 5 10 1.2 3.3 2.8 40 6 68 0.35
BF42HS48-1206-HPR42-LSW 1.8 2 Round Lead wire 48 5 24 1.2 3.3 2.8 40 6 68 0.35
BF42HS48-1206-HPS42-L 1.8 2 Round Lead wire 48 5 10 1.2 3.3 2.8 40 6 68 0.35
BF42HS48-1206-HPS42-LSW 1.8 2 Round Lead wire 48 5 24 1.2 3.3 2.8 40 6 68 0.35
BF42HS48-1684-HPR42-L 1.8 2 Round Lead wire 48 5 10 1.68 1.65 2.8 44 4 68 0.35
BF42HS48-1684-HPR42-LSW 1.8 2 Round Lead wire 48 5 24 1.68 1.65 2.8 44 4 68 0.35
BF42HS48-1684-HPS42-L 1.8 2 Round Lead wire 48 5 10 1.68 1.65 2.8 44 4 68 0.35
BF42HS48-1684-HPS42-LSW 1.8 2 Round Lead wire 48 5 24 1.68 1.65 2.8 44 4 68 0.35
BF42HS60-1206-HPR42-L 1.8 2 Round Lead wire 60 5 10 1.2 6 7 56 6 102 0.55
BF42HS60-1206-HPR42-LSW 1.8 2 Round Lead wire 60 5 24 1.2 6 7 56 6 102 0.55
BF42HS60-1206-HPS42-L 1.8 2 Round Lead wire 60 5 10 1.2 6 7 56 6 102 0.55
BF42HS60-1206-HPS42-LSW 1.8 2 Round Lead wire 60 5 24 1.2 6 7 56 6 102 0.55
BF42HS60-1704A-HPR42-L 1.8 2 D-cut Connector 60 5 10 1.7 3 6.2 73 4 102 0.55
BF42HS60-1704A-HPR42-LSW 1.8 2 D-cut Connector 60 5 24 1.7 3 6.2 73 4 102 0.55
BF42HS60-1704A-HPS42-L 1.8 2 D-cut Connector 60 5 10 1.7 3 6.2 73 4 102 0.55
BF42HS60-1704A-HPS42-LSW 1.8 2 D-cut Connector 60 5 24 1.7 3 6.2 73 4 102 0.55

NEMA 17 BF-HPR42 L / LSW Series High Precision Planetary Gearbox Specification

Model / BF-HPR42-L1 BF-HPR42-L2 BF-HPR42-L1SW BF-HPR42-L2SW
Gear Ratio / 3 4 5 7 10 15 16 20 25 28 30 35 40 45 50 70 100 3 4 5 7 10 15 16 20 25 28 30 35 40 50 70 100
Gear Trains / 1 2 1 2
Gearbox Length mm 61.5 72.5 76.5 87.5
Rated Torque N.m 8 9 9 5 5 10 12 12 10 10 10 10 10 10 10 10 5 8 9 9 5 5 10 12 12 10 10 12 10 10 10 10 5
Sundden Stop Torque N.m 16 18 18 10 10 20 24 24 20 20 20 20 20 20 20 20 10 16 18 18 10 10 20 24 24 20 20 24 20 20 20 20 10
Back Lash arcmin ≤15 arcmin ≤20 arcmin ≤15 arcmin ≤20 arcmin
Efficiency % 96 94 96 94
Suitable Motor Dimension mm Φ5-10 / Φ22-2 / F31-M3Φ5-10 / Φ22-2 / F31-M3 Φ5-24 / Φ22-2 / F31-M3
Rated Input Speed rpm 3000
Max Input Speed rpm 6000
Average Life Span h 20000
Axial Force N 100
Radial Force N 300
Noise dB ≤55
Protection Level IP IP54
Work Temp. ℃ -20 to + 150
Out Shaft Type / Key Shaft Type
nema 23 planetary gearbox

NEMA 23 Hybrid Stepper Motor with BF-HPR60 / HPS60 Series High Precision Planetary Gearbox

Stepper motor, high torque, low noise, smooth type, step angle: 0.9° or 1.2° or 1.8° NEMA23, 57x57mm
Gear Ratio: 1 Stage: 3/4/5/7/10:1
2 Stage: 16/20/25/28/30/35/40/50/70/100:1
Optional: Lead-wires, gearbox, encoder, brake, integrated drivers...
Model Step Angle Phase Shaft Type Body Length Shaft Dia Shaft Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L) mm mm mm A Ω mH Nm No. g.cm2 Kg
BF57HS41-2804 with HPR60-L Series 1.8 2 Round 41 8 14.5 2.8 0.7 1.4 0.55 4 150 0.47
BF57HS41-2804 with HPR60-LSW Series 1.8 2 Round 41 8 21 2.8 0.7 1.4 0.55 4 150 0.47
BF57HS51-2804 with HPR60-L Series 1.8 2 Round 51 8 14.5 2.8 0.83 2.2 1.01 4 230 0.59
BF57HS51-2804with HPR60-LSW Series 1.8 2 Round 51 8 21 2.8 0.83 2.2 1.01 4 230 0.59
BF57HS56-2804 with HPR60-L Series 1.8 2 Round 56 8 14.5 2.8 0.9 2.5 1.26 4 280 0.68
BF57HS56-2804with HPR60-LSW Series 1.8 2 Round 56 8 21 2.8 0.9 2.5 1.26 4 280 0.68
BF57HS76-2804 with HPR60-L Series 1.8 2 Round 76 8 14.5 2.8 1.1 3.6 1.89 4 440 1.1
BF57HS76-2804with HPR60-LSW Series 1.8 2 Round 76 8 21 2.8 1.1 3.6 1.89 4 440 1.1
BF57HS82-3004 with HPR60-L Series 1.8 2 Round 82 8 14.5 3.0 1.2 4.0 2.1 4 600 1.2
BF57HS82-3004with HPR60-LSW Series 1.8 2 Round 82 8 21 3.0 1.2 4.0 2.1 4 600 1.2
BF57HS100-3004 with HPR60-L Series 1.8 2 Round 100 8 14.5 3.0 0.75 3.0 3.0 4 700 1.3
BF57HS100-3004 with HPR60-LSW Series 1.8 2 Round 100 8 21 3.0 0.75 3.0 3.0 4 700 1.3
BF57HS112-3004 with HPR60-L Series 1.8 2 Round 112 8 14.5 3.0 1.6 7.5 3.0 4 800 1.4
BF57HS112-3004 with HPR60-LSW Series 1.8 2 Round 112 8 21 3.0 1.6 7.5 3.0 4 800 1.4
BF57HS112-4204 with HPR60-L Series 1.8 2 Round 112 8 14.5 4.2 0.9 3.8 3.1 4 800 1.4
BF57HS112-4204 with HPR60-LSW Series 1.8 2 Round 112 8 21 4.2 0.9 3.8 3.1 4 800 1.4

NEMA 23 BF-HPR60 L Series Common Planetary Gearbox Specification

Model / BF-HPR/HPS60-L1 BF-HPR/HPS60-L2 BF-HPR/HPS60-L1SW BF-HPR/HPS60-L2SW
Gear Ratio / 3 4 5 7 10 16 20 25 28 30 35 40 50 70 100 3 4 5 7 10 16 20 25 28 30 35 40 50 70 100
Gear Trains / 1 2 1 2
Gearbox Length mm 92 108 100.3 112.8
Rated Torque N.m 16 25 28 20 10 30 30 32 30 30 30 25 25 20 10 16 25 28 20 10 30 30 32 30 30 30 25 25 20 10
Sundden Stop Torque N.m 32 50 56 40 20 60 60 64 60 60 60 50 50 40 20 32 50 56 40 20 60 60 64 60 60 60 50 50 40 20
Back Lash arcmin ≤15 arcmin ≤20arcmin ≤15 arcmin ≤20 arcmin
Efficiency % 96 94 96 94
Suitable Motor Dimension mm Φ8-14 / Φ38.1-2 / F47.4-M4 Φ8-30 / Φ38.1-2 / F47.14-M4
Rated Input Speed rpm 3000
Max Input Speed rpm 6000
Average Life Span h 20000
Axial Force N 230
Radial Force N 400
Noise dB ≤65
Protection Level IP IP54
Work Temp. ℃ -20 to + 150
Out Shaft Type / Key Shaft Type
nema 34 planetary gearbox

NEMA 24 Hybrid Stepper Motor with BF-HPR60 / HPS60 Series High Precision Planetary Gearbox

Stepper motor, high torque, low noise, smooth type, step angle: 1.8° NEMA24, 60x60mm
Gear Ratio: 1 Stage: 3/4/5/7/10:1
2 Stage: 16/20/25/28/30/35/40/50/70/100:1
Optional: Lead-wires, gearbox, encoder, brake, integrated drivers...
Model Step Angle Phase Wires Body Length Shaft Dia Shaft Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / (L)mm mm mm A Ω mH Nm No. g.cm2 Kg
BF60HS56-2804 with HPR60-L Series 1.8 2 Direct wire 56 8 14.5 2.8 0.9 3.6 1.65 4 300 0.77
BF60HS56-2804 with HPR60-LSW Series 1.8 2 Direct wire 56 8 24 2.8 0.9 3.6 1.65 4 300 0.77
BF60HS67-2804 with HPR60-L Series 1.8 2 Direct wire 67 8 14.5 2.8 1.2 4.6 2.1 4 570 1.2
BF60HS67-2804 with HPR60-LSW Series 1.8 2 Direct wire 67 8 24 2.8 1.2 4.6 2.1 4 570 1.2
BF60HS88-2804 with HPR60-L Series 1.8 2 Direct wire 88 8 14.5 2.8 1.5 6.8 3.1 4 840 1.4
BF60HS88-2804 with HPR60-LSW Series 1.8 2 Direct wire 88 8 24 2.8 1.5 6.8 3.1 4 840 1.4
BF60HS100-2804 with HPR60-L Series 1.8 2 Direct wire 100 8 14.5 2.8 1.6 6.4 4 4 980 1100
BF60HS100-2804 with HPR60-LSW Series 1.8 2 Direct wire 100 8 24 2.8 1.6 6.4 4 4 980 1100
BF60HS111-2804 with HPR60-L Series 1.8 2 Direct wire 111 8 14.5 2.8 2.2 8.3 4.5 4 1120 1200
BF60HS111-2804 with HPR60-LSW Series 1.8 2 Direct wire 111 8 24 2.8 2.2 8.3 4.5 4 1120 1200

NEMA 24 BF-HPR60 L Series Common Planetary Gearbox Specification

Model / BF-HPR/HPS60-L1 BF-HPR/HPS60-L2 BF-HPR/HPS60-L1SW BF-HPR/HPS60-L2SW
Gear Ratio / 3 4 5 7 10 16 20 25 28 30 35 40 50 70 100 3 4 5 7 10 16 20 25 28 30 35 40 50 70 100
Gear Trains / 1 2 1 2
Gearbox Length mm 92 108 100.3 112.8
Rated Torque N.m 16 25 28 20 10 30 30 32 30 30 30 25 25 20 10 16 25 28 20 10 30 30 32 30 30 30 25 25 20 10
Sundden Stop Torque N.m 32 50 56 40 20 60 60 64 60 60 60 50 50 40 20 32 50 56 40 20 60 60 64 60 60 60 50 50 40 20
Back Lash arcmin ≤15 arcmin ≤20arcmin ≤15 arcmin ≤20 arcmin
Efficiency % 96 94 96 94
Suitable Motor Dimension mm Φ8-14 / Φ38.1-2 / F47.4-M4 Φ8-30 / Φ38.1-2 / F47.14-M4
Rated Input Speed rpm 3000
Max Input Speed rpm 6000
Average Life Span h 20000
Axial Force N 230
Radial Force N 400
Noise dB ≤65
Protection Level IP IP54
Work Temp. ℃ -20 to + 150
Out Shaft Type / Key Shaft Type
nema 34 planetary gearbox

NEMA 34 Hybrid Stepper Motor with BF-HPS90 LMB Series High Precision Planetary Gearbox

Stepper motor, low rotor inertia, large torque, fast acceleration, step angle: 1.8°, NEMA34, 86x86mm
Gear Ratio: 1 Stage: 4/5/7/10:1
2 Stage: 16/20/25/28/35/40/50/70:1
Optional: Lead-wires, gearbox, encoder, brake, integrated drivers...
Model Step Angle Phase Shaft Type Wires Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / / (L)mm A Ω mH Nm No. g.cm2 Kg
BF86HS78-6004 1.8 2 Key Direct wire 78 6.0 0.37 3.4 4.6 4 1400 2.3
BF86HS115-6004 1.8 2 Key Direct wire 115 6.0 0.6 6.5 8.7 4 2700 3.8
BF86HS126-6004 1.8 2 Key Direct wire 126 6.0 0.58 6.5 9.5 4 3200 4.5
BF86HS155-6004 1.8 2 Key Direct wire 155 6.0 0.68 9.0 13.0 4 4000 5.4

NEMA 34 BF- HPS90 LMB Series High Precision Planetary Gearbox Specification

Model / BF-HPS90-L1MB BF-HPS90-L2MB
Gear Ratio / 4 5 7 10 16 20 25 28 35 40 50 70
Gear Trains / 1 2
Gearbox Length mm 150 172.5
Rated Torque N.m 80 90 60 39 90 90 100 90 100 90 100 70
Sundden Stop Torque N.m 160 180 120 78 180 180 200 180 200 180 200 140
Back Lash arcmin ≤10 arcmin ≤15 arcmin
Efficiency % 96 94
Suitable Motor Dimension mm Φ14-40 / Φ73-3 / F69.6-M5
Rated Input Speed rpm 3000
Max Input Speed rpm 6000
Average Life Span h 20000
Axial Force N 800
Radial Force N 1000
Noise dB ≤55
Protection Level IP IP54
Work Temp. ℃ -20 to + 150
Out Shaft Type / Key Shaft Type

Stepper Motor with Planetary Gearbox Key Components:

Stepper Motors:

  • A brushless DC motor that moves in discrete steps, offering precise positioning and speed control.
  • Commonly available in bipolar or unipolar configurations.
  • Steps per revolution: Typically 200 steps (1.8° per step), but microstepping can provide finer resolution.
 

Planetary Gearboxes:

  • A gear reducer with a sun gear, planet gears, and a ring gear, providing high torque output in a compact design.
  • Known for high efficiency, load distribution, and low backlash.
  • Gear ratios: Commonly range from 3:1 to 216:1.
 

How it Works?:

  • The stepper motor drives the sun gear of the planetary gearbox.
  • The planet gears rotate around the sun gear and mesh with the stationary ring gear.
  • This results in a reduction of the motor's output speed while increasing torque.
 

Advantages:

  • High Torque Output: Planetary gearboxes amplify the motor's torque significantly.
  • Compact Design: The gearbox is integrated directly with the motor, saving space.
  • Precise Motion Control: Stepper motors provide accurate positioning, especially when combined with microstepping.
  • Low Backlash: Planetary gearboxes have minimal backlash, ensuring precise motion.
  • Durability: Robust design for high-load applications.
 

Considerations:

  • Gear Ratio: Choose the appropriate gear ratio based on the required speed and torque.
  • Backlash: Ensure the gearbox has low backlash for high-precision applications.
  • Motor Size: Match the motor size (NEMA standard, e.g., NEMA 17, 23, 34) to the load requirements.
  • Operating Conditions: Consider temperature, environment (dust, moisture), and duty cycle.
  • Control Electronics: Use a stepper motor driver capable of microstepping for smoother operation.
 

Applications:

  • Robotics: Precise joint or arm motion control.
  • CNC Machines: Accurate positioning in milling, cutting, and engraving.
  • Automotive: Actuators for mirrors, seats, or wiper systems.
  • Medical Devices: Precision equipment like pumps and surgical tools.
  • Industrial Automation: Conveyors, pick-and-place systems, and packaging machines.
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