Our Location
1103A Tianhui Building, Yeqin 1st Road, Longcheng Street, Shenzhen, Guangdong, China
NEMA 17 Precision Planetary Gearbox – 42mm Planetary Gear Reducer for Stepper Motor Applications
High-precision 42mm NEMA 17 planetary gearbox designed for stepper and servo motors. This compact planetary gear reducer delivers low backlash, high torque density, and smooth operation — ideal for CNC, robotics, and automation systems.
NEMA 17 Precision Planetary Gearbox – 42mm Compact Planetary Gear Reducer
The NEMA 17 planetary gearbox (also known as a 42mm precision planetary gear reducer or planetary gear motor) provides high torque transmission, superior rigidity, and low backlash for accurate motion control.
It is ideal for stepper motors, servo systems, CNC machinery, robotics, and automation applications.
1. Technical Specifications
| Parameter | Specification |
|---|---|
| Reducer Series | 42PLEKxxSW (Precision Planetary Gearbox) |
| Applicable Motor | Ø5~Ø10 Shaft / Ø22-2 / F31-M3 (NEMA17 compatible) |
| Reduction Ratio (i) | 3:1 ~ 70:1 (multi-stage available) |
| Rated Output Torque (Tn) | Up to 12 N·m |
| Maximum Torque | 2×Rated Torque |
| Rated Speed | 3000 rpm |
| Maximum Input Speed | 6000 rpm |
| Backlash (Arcmin) | ≤15 arcmin (Level 1) / ≤20 arcmin (Level 2) |
| Efficiency | 96% (Level 1) / 94% (Level 2) |
| Noise Level | ≤60 dB |
| Protection Grade | IP54 |
| Lubrication | Lifetime grease lubrication (synthetic long-life grease) |
| Mounting Position | Any direction |
| Service Life | ≥20,000 hours |
| Operating Temperature | -10°C ~ +90°C |
| Weight | ≈0.25 kg |
| Input Shaft Tolerance | h6 |
| Output Shaft Standard | Flat Key (Type A / GB1096-79) |
| Momentary Overload | ≤2×Rated Torque |
| Housing Material | High-strength aluminum alloy with precision machining |
2. Gear Ratio & Torque Table
| Model | Gear Ratio | Rated Output Torque (N·m) | Efficiency | Backlash (arcmin) |
|---|---|---|---|---|
| OKD42PLEK35W | 3:1 | 8 | 96% | ≤15 |
| OKD42PLEK45W | 4:1 | 9 | 96% | ≤15 |
| OKD42PLEK55W | 5:1 | 10 | 96% | ≤15 |
| OKD42PLEK105W | 10:1 | 10 | 94% | ≤20 |
| OKD42PLEK125W | 12:1 | 10 | 94% | ≤20 |
| OKD42PLEK155W | 15:1 | 10 | 94% | ≤20 |
| OKD42PLEK205W | 20:1 | 12 | 94% | ≤20 |
| OKD42PLEK255W | 25:1 | 12 | 94% | ≤20 |
| OKD42PLEK405W | 40:1 | 12 | 94% | ≤20 |
| OKD42PLEK705W | 70:1 | 12 | 94% | ≤20 |
3. Wiring Diagram and Connection Table
| Wire Color | Connection |
|---|---|
| Red | A+ |
| Blue | A− |
| Green | B+ |
| Black | B− |
4. Key Features
- Compact 42mm planetary gearbox designed for NEMA 17 stepper and servo motors
- High torque density with 96% transmission efficiency
- Low backlash precision gearhead for accurate positioning
- Quiet operation ≤60 dB, IP54 protection, long life lubrication
- Ideal for CNC, robotics, 3D printers, and automation equipment
5. FAQ – Planetary Gearbox Technical Questions
Q1: What is the professional English term for “Planetary Gearbox”?
A1: The most standard terms are Planetary Gearbox or Planetary Gearhead. These describe the transmission system composed of sun gear, planet gears, and ring gear that operate in a planetary motion.
Q2: What does “Backlash” mean and why is it important?
A2: Backlash is the angular clearance between the gearbox’s input and output shafts, measured in arcminutes. Low backlash planetary gearboxes ensure higher precision and repeatability, which are vital in CNC and robotics applications.
Q3: What is an “Integrated Planetary Gearbox”?
A3: Also called a Direct-Connect Planetary Gearhead, this type integrates the gearbox directly with the motor for compact design, improved rigidity, and better torque density.
Q4: What does “Rated Torque” refer to?
A4: Rated Torque means the maximum continuous torque the gearbox can safely transmit during its lifespan, ensuring reliability and durability.
Q5: What are the main advantages of planetary gear reducers?
A5: Planetary gear reducers offer exceptional power density, rigidity, and efficiency, enabling compact design and smooth, precise motion in automation systems.
6. Related Products & Blog
Be the first to review “NEMA 17 Precision Planetary Gearbox – 42mm Planetary Gear Reducer for Stepper Motor Applications”
Related products
-
35mm Lead Screw Stepper Motor Linear Actuator – Single Shaft / Dual Shaft with Encoder Option
-
NEMA 14 2-Phase Hollow Shaft Stepper Motor with 3 meters Encoder cable and EtherCAT Drive
-
35mm NEMA 14 Ball and Screw Linear Actuator Stepper Motor with Ball Screw 150mm
-
14MM Stepper Motor Small – Compact Bipolar Motor with Precise Control and Dual Shaft Design
Reviews
There are no reviews yet.