Industrial & Scientific

The Best Gearboxes, Gearheads & Speed Reducers

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Our picks are based on Amazon bestseller rankings, verified customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.

Selecting the correct gearbox, gearhead, or speed reducer is crucial for optimizing performance and longevity in industrial applications. These components are essential for controlling motor speed and torque, directly impacting efficiency and the operational success of machinery. Understanding their nuances ensures a reliable and cost-effective solution for your specific needs.

SaleNo. 1
FPBIGCHA WPA WPS WPO WPX40 50 60 70 80 100 Gearbox Iron Shell Worm Gear Reducer Small Motor Transmission Gears...
  • You can change the wiring-connection to change motor rotation
  • With time delay and increased torque function,It is widely used in light industry, food industry, chemical construction, machinery and equipment, textile industry, building materials, logistics, environmental protection and other fields.
  • Offers the flexibility to change the direction of rotation by simply altering the wiring connection, accommodating various operational requirements and enhancing the motor's versatility in different setups.
  • The direction of the output shaft of the is perpendicular to the motor shaft, so the output shaft direction of the main body will be shorter than that of the ordinary geared motor.
No. 2
MRV063 Worm Gear Speed Reducer 1-1/8" Keyed Single Output Shaft Kit
  • Complete Output Shaft Kit for 063 Series Reducers
No. 3
Planetary Gearbox Speed Reducer Ratio 10:1 Backlash 18 arc-min 3000RPM Gear Head Gearboxes for 14mm Input...
  • Planetary gearbox for Nema34 86mm Stepper Motor. Reduction box frame size: 85x85 mm(3.35 inch). Gear reduction box output shaft: 16mm(0.63 inch); gear reducer input shaft: 14mm( 0.55 inch).
  • Gearbox Type: Planetary gearbox for nema34 86mm stepper motor. Planetary gear box Backlash < 18 arc-min, Rated load (N.M): 30Nm, Maximum load (N.M): 50Nm.
  • Wide Application: Planetary gear is a good solution in applications that need low rotation speeds and/or lots of huge torque. It is mainly used to reduce the speed of the Nema 34 stepper motor, widely working on mill, lathe, bench, and bandsaw machines.
  • Gear Ratio: 10 :1. Long life - 20000h, usage durable,Full Load Efficiency: 95%, Low noise. Protection Class: IP65.
  • Included:1pc x Planetary Gearbox, 4pc x Screws. High-precision gears, low noise, professional engineers design, high hardness.
No. 4
Gear Reduction Box, Reduction Gearbox with Internal Clutch 13Hp Reducer with 2:1 Speed Reduction Rotatable Oil...
  • ⚙️【 DURABLE MATERIAL 】This reducer is made of iron and aluminum, which is very strong and durable. It can resist high temperatures .
  • ⚙️【 HIGH-PRECISION 】Each part of this reducer is carefully machined for a compact structure and high precision. This reducer achieves a 1/2 deceleration effect. Reducing the speed can increase the output torque at the same time.
  • ⚙️【 HIGH HORSEPOWER 】 This reducer has 13HP, which allows your car to reach the right speed very quickly.
  • ⚙️【 EASY TO INSTALL 】This reducer is compact and lightweight. You can install it very easily. It generates less noise than its traditional counterparts. So you don't have to worry about the noise produced during use affecting the normal life of...
  • ⚙️【 SPECIALIZED PART 】This reducer is suitable for H0nda GX270. The special customization is only to bring you a better user experience and use it more efficiently.
No. 5
Planetary Gearbox Speed Reducer Gear Head Ratio 10:1 Backlash <= 7 arc-min for 19mm Input Shaft 750w 80mm...
  • Planetary Reducer for 80mm Servo Motor. Planetary Gear Frame Size: 80x80 mm; Output Shaft: 20mm; Input Shaft: 19mm, adapter motors: Fit for 19mm Shaft 80mm servo motor. Gearbox Body length: 114mm (not including output shaft length).
  • Gear Ratio: 10 :1, Gear Reduction Box Backlash Precision: <= 7 Arcmin, Full load efficiency: 96%, max input speed: 6000rpm, rated input speed: 3500 rpm, Torsion rigidity: 1.8Nm/arcmin.
  • Applications: Compact design, flexible and easy installation, space-saving. This planetary gearbox is mainly used to reduce speed and increase holding torque, widely applied in CNC machine, such as engraving machine, milling machine, lathe, work bench...
  • Torque: 56N. It's a good solution in applications that need low rotation speeds and/or lots of huge torque.
  • Advantages: High-precision gears, low noise, professional engineers design, high hardness, 20CrMnTi steel, hard hobbing after carburizing, hardness up to 50 degrees, wear-resistant, no tooth chipping. Included:1pc x Planetary Gearbo, 4pc x Screws.
No. 6
XUNKUANER NMRV040 Worm Speed Reducer Gearbox Double Output Shaft
  • SPECIFICATION:Output diameter: 18mm; Output terminal length: 43mm; Dual output shaft total length: 164mm; Single output shaft total length: 128mm; Shaft end screw hole: M6 x 16
  • FEATURES: NMRV040 worm gear box dedicated output shaft, which is stable and durable
  • EXCELLENT MATERIAL: Alloy steel material, finely crafted, smooth surface, high temperature resistance, sturdy and durable, can effectively protect the turbine wheel and motor body
  • APPLICATION: Suitable for NMRV040 NEMA34 stepper motor worm gear reducer
  • PACKING LIST: Single output shaft: 1 x Output Shaft, 2 x Gasketts, 2 x S rings, 4 x Corner pins; Dual output shaft: 1 output shaft, 2 washers, 2 S-rings, 4 corner pins
No. 7
Nema 34 Planetary Gearbox Ratio 5:1 Speed Reducer Backlash <18 arc-min 3000RPM Gear Head 14 Inch Input Shaft...
  • Planetary gearbox for Nema34 86mm Stepper Motor. Reduction box frame size: 86x86 mm(3.38 inch). Gear reduction box output shaft: 16mm(0.63 inch); gear reducer input shaft: 14mm( 0.55 inch).
  • Gearbox Type: Planetary gearbox for nema34 86mm stepper motor, gear reduction box Backlash 18 arc-min. Rated load (N.M): 30Nm, Maximum load (N.M): 50Nm. Material: Alloy Steel.
  • Gear Ratio: 5 :1. Long life - 20000h, usage durable,Full Load Efficiency: 95%, Low noise. Protection Class: IP65.
  • Wide Application: Planetary gear is a good solution in applications that need low rotation speeds and/or lots of huge torque. It is mainly used to reduce the speed of the 86mm stepper motor, widely working on mill, lathe, bench, and bandsaw machines.
  • Included:1pc x Planetary Gearbo, 4pc x Screws. High-precision gears, low noise, professional engineers design, high hardness.
No. 8
CNCTOPBAOS NMRV040 Worm Gear Reducer Gearbox 20:1 for Nema34 Stepper Motor
  • Precision 20:1 Speed Ratio Worm Gear Reducer - Model NMRV040 RV40 worm gearbox with 20:1 speed ratio, engineered for accurate speed regulation and reliable torque amplification, perfectly matched with Nema34 stepper motors and Nema34 servo motors, ideal...
  • Standardized Nema34 Mounting & Exact Shaft Specifications - Features an 86mm x 86mm (3.38" x 3.38") standard Nema34 flange with 73mm (2.87") spigot length and 95mm (3.74") diagonal pitch, paired with a 14mm (0.55") input bore diameter and an 18mm...
  • Smooth Transmission & Low-Noise Stable Operation - Adopts a high-precision hardened worm gear set and high-speed bearings, providing stable power transmission with minimal backlash, low operating noise and reliable overheating resistance. Its stable...
  • Premium Material Build for Durability & High Load Capacity - Crafted with a high-quality aluminum alloy enclosure for excellent thermal dissipation, high rigidity and corrosion resistance. Internal core components include a hardened high-quality steel...
  • Widely adaptable to various automation scenarios: CNC routers, engraving machines, Conveyor belts & sorting industrial automation lines, automatic packaging machines, DIY robotic arms, Small industrial robot joints, Rotary indexing tables, Automatic...
No. 9
Planetary Gearbox Speed Reducer Gear Head Ratio 5:1 Backlash <= 7 arc-min for 19mm Input Shaft 80mm Servo...
  • Planetary Reducer for 80mm Servo Motor. Planetary Gear Frame Size: 80x80 mm; Output Shaft: 20mm; Input Shaft: 19mm, adapter motors: Fit for 19mm Shaft 80mm servo motor; Gear Ratio: 5 :1. Gearbox Body length: 114mm (not including output shaft length).
  • Gear Reduction Box Backlash Precision: <= 7 Arcmin, Full load efficiency: 96%, max input speed:8000rpm, rated input speed: 3500 rpm, Torsion rigidity: 1.8Nm/arcmin.
  • Maximum torque:122N. It's a good solution in applications that need low rotation speeds and/or lots of huge torque. Special grease, non-solidifying, long-lasting lubrication,lifespan is around 20000h.
  • Applications: Compact design, flexible and easy installation, space-saving. This planetary gearbox is mainly used to reduce speed and increase holding torque, widely applied in CNC machine, such as engraving machine, milling machine, lathe, work bench...
  • Advantages: High-precision gears, low noise, professional engineers design, high hardness, 20CrMnTi steel, hard hobbing after carburizing, hardness up to 50 degrees, wear-resistant, no tooth chipping. Included:1pc x Planetary Gearbo, 4pc x Screws.
No. 10
Planetary Gearbox Speed Reducer Gear Head Ratio 10:1 Backlash 7 arc-min for 14mm / 12.7mm Shaft nema34 86mm...
  • RPlanetary gearbox for Nema34 86mm Stepper Motor. Reduction box frame size: 90x90 mm(3.54 inch). Gear reduction box output shaft: 20mm(0.78 inch); gear reducer input shaft: 14mm( 0.55 inch) and 12.7mm(0.5 or ½inch). Body length: 154.5mm(6.08 in).
  • Gear Ratio: 10:1. Backlash Precision: <= 7 Arcmin, Full load efficiency: 96%, max input speed: 6000rpm, rated input speed: 3500 rpm, Torsion rigidity: 1.8Nm/arcmin.
  • It's a good solution in applications that need low rotation speeds and/or lots of huge torque. Advantages: Special grease, non-solidifying, long-lasting lubrication,lifespan is around 20000h; Lower noise: less than 60dB.
  • Applications: Compact design, flexible and easy installation, space-saving. This planetary gearbox is mainly used to reduce speed and increase holding torque, widely applied in CNC machine, such as engraving machine, milling machine, lathe, work bench...
  • Included:1pc x Planetary Gearbo, 4pc x Screws, 1pc x 14mm to 12.7mm shaft adapter - the function of the shaft adapter is to modifies the input bore of the gearbox. The standard 14mm input bore fits a NEMA 34 stepper motor with a 14mm output shaft, when...

Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Gearboxes, Gearheads & Speed Reducers

Making Your Choice

When selecting, consider the operating environment (temperature, dust, moisture), duty cycle, and required precision. For high-torque, low-speed applications, worm or planetary gears might be best. If smooth, quiet operation is paramount, helical or cycloidal drives are good options. Always consult manufacturer specifications and consider consulting with an engineer if your requirements are complex.

Frequently Asked Questions

What is the difference between a gearbox and a gearhead?
A gearbox is a general term for a mechanical system that alters speed and torque using gears. A gearhead often refers to a specific type of gearbox designed to attach directly to a motor, often as a single unit.
How do I calculate the required gear ratio?
Divide the motor's speed by the desired output speed. For example, if your motor runs at 1800 RPM and you need 300 RPM output, you'll need a 6:1 gear ratio.
What does 'backlash' mean in a gearbox?
Backlash is the small amount of play or lost motion between mating gear teeth. Low backlash is critical for applications demanding precise positioning, like robotics.
How does torque rating affect my choice?
The torque rating indicates the maximum rotational force the reducer can handle. You must select a unit with a torque rating that exceeds your application's maximum torque requirement, including any startup or shock loads.
Are gear reducers suitable for high-temperature environments?
Some gear reducers are designed for high-temperature operation, but it depends on the materials and lubrication used. Always check the product specifications for operating temperature limits.
What maintenance do these components typically require?
Maintenance usually involves checking and topping up or replacing lubricant at recommended intervals. Regular inspection for leaks or unusual noises is also important for early detection of potential issues.