Gears/ Gearboxes

US$0.90
Blue 29mm Plastic Concave Pulley.
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US$0.90
Red 29mm Plastic Concave Pulley.
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US$4.50
This brushed DC motor gear kit is perfect for students and hobbyists for their DIY kits. It is capable of running at 3VDC for better longevity of the motor at the cost of losing half the amount of speed and torque, compared to running it at 6VDC. That said, the mounted gears give a reduction ratio of 20:1 which means you will get about 20 times the amount of torque you would normally get from the motor itself.
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US$8.87
The 82 gear packs contain axles, tires, gears, and bushings. There are copper gears, bevel gears, racks, and 2.3 and 3.17 gears. Your imagination is the limit!
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US$11.60
Kit of 4 motors, 80 plastic gears and pulleys for DIY robotics and toy replacement parts.
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US$13.42
This package comes with a diverse set of parts that can be used for your various projects!
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US$9.96
This package comes with a diverse set of parts that can be used for your various projects!
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US$22.52
This package comes with a diverse set of parts that can be used for your various projects!
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US$15.42
This package comes with a diverse set of parts that can be used for your various projects!
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US$24.98
This package comes with a diverse set of parts that can be used for your various projects!
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US$8.87
Plastic Gearbox Four Wheel Drive Car Toy High-Speed Motor Model Accessories, set of 50 pces.
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US$0.72
This gear has 12 teeth that is designed to work with 1.5mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 2mm. Sold by the unit.
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US$0.90

This is a motor reduction gear with 54 teeth to 10 teeth.

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US$1.08

This is a motor reduction gear with 40 teeth to 11 teeth.

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US$1.26

This is a motor reduction gear with 54 teeth to 20 teeth.

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US$1.36

This is a motor reduction gear with 43 teeth to 26 teeth.

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US$6.14

This product is a simple ratchet set. This small device uses a pawl to limit the motion of gear, allowing it to freely turn one direction, yet it stops it for the other. 

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US$2.72
Plastic Square Gear Brush Motor 3V
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US$4.19
This 310 sized Dc motor delivers a decent amount of torque for its size, with the gear reduction inside the acrylic casing. Great to be used in DIY projects or as a replacement of broken parts.
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US$1.39
This assortment of plastic gears contain a pair of three different sizes of matching 0.5mm modulus (M = reference of diameter / number of teeth). The gears have an inner diameter varying from 2, 2.5 to 3mm and an outer diameter varying from 10 to 18.5mm, amongst the kit. They are great to be used as replacement part for toys gears and “DIY” robotics.
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US$1.67
Plastic reduction gears with 0.5 modulus for rack drive DIY robotics and toy replacement parts. Diameters are 16.75 and 5.75 mm. Quantity: 5.
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US$0.83
Metal spindle gear made of 45 steel for model motors in DIY robotics and toy replacement parts. Specifications: Modulus: 0.6M. Spindle hole: 3.17mm tight match. Side hole: 1.5 mm. Thickness: about 7.5 mm. Material: #45 steel. Tooth surface width: about 4mm. Gear outer diameter: about 8.4mm. Quantity: 1.
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US$2.79
This is a 20 tooth steel gear with set screw for robotics motors and toy replacement parts. Gear Diameter: 11.0 mm. Motor Shaft Diameter: 5.0 mm. Quantity: 1.
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US$0.63
40 tooth 0.2 modulus and 9 tooth 0.25 modulus reduction gear. Diameter 8.25 and 2.25 mm. Quantity: 1.
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US$0.35
Made of nylon plastic, this gear mounts on a D-shaped motor shaft of 2.5mm diameter and allows you to drive other gears or geared shafts to transfer the rotational movement. Great as a replacement. Sold by the unit.
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US$1.39
Set of 5 different plastic gears for DIY robotics and toy replacement parts. Diameters: 25, 19, 11, 5.5, 5. Quantity: 5.
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US$0.69
This is a plastic eccentric wheel cam coupler for 2mm motor shafts. Useful for DIY robotics and toy replacement parts. Quantity: 1.
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US$3.59
This T junction coupler has an inner diameter of 2mm so 2mm shafts can be attached together making a solid frame for a small car chassis or frame or any robotic junction.
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US$3.91
Made from plastic, this worm gear will transform a rotational movement coming from a shaft into another shaft with 90 degrees of angle.
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US$3.91
This is a small pack of 15 assorted plastic gears. They make excellent replacement parts for your DIY projects, or they can be used in any of your application needs.
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US$4.19
This is a small pack of 15 assorted plastic gears. They make excellent replacement parts for your DIY projects, or they can be used in any of your application needs.
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US$4.32
This is a 45 degrees angled 20 teeth bevel gear with 3mm central pitch. The collar part is made of carbon steel while the gears portion is made of black coated carbon steel for better wear protection. Using two sets of these bevel gears together allows for a smooth 90 degrees shaft rotation transfer. It is great to be used in robotic projects and DIY kits. Two mounting screws are included. Sold by the unit.
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US$13.93
This is a kit that included different types of gears and pulleys that can be used as a replacement for your gears for your DIY Projects.
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US$4.19
Made of plastic, this set of gears contains an array of double-decked gears. They are great to be used in a DIY reductive transmission for higher torque applications.
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US$0.59
This is a 60 tooth plastic gear with 2mm shaft hole. It can be used as a replacement part for your DIY robotic project gear. Sold per unit.
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US$1.99
This gear has 10 teeth that is designed to work with 2mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
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US$1.99
This gear has 8 teeth that is designed to work with 2mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
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US$1.99
This gear has 12 teeth that is designed to work with 2.3mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
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US$1.99
This gear has 14 teeth that is designed to work with 3.1mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
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US$1.99
This gear has 16 teeth that is designed to work with 1.5mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
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US$1.99
This gear has 16 teeth that is designed to work with 3.1mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
Delivery within 2-3 weeks
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US$1.99
This gear has 15 teeth that is designed to work with 2.9mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
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US$4.19
This iron gear has 10 inner teeth and 36 outer teeth. It is designed to work with 2mm shaft rods. Commonly used for replacement parts on motors or toys. It has a height of 5mm. Sold by the unit.
Delivery within 2-3 weeks
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US$15.39
Handy 106 kinds assortment of plastic gears and pulley gear transmissions for the hobbyist, toy model car builder and roboticist. Includes 106 kinds of plastic gears, pulley gear transmissions, a plastic linear rack drive, three shaft couplings and an O-ring drive belt.
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US$2.98
Handy assortment of plastic pulleys and pulley gear transmission for the hobbyist, toy car builder and roboticists.
Delivery within 2-3 weeks
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US$4.19
This brushed DC motor gear kit is perfect for students and hobbyists for their DIY kits. It is capable of running at 3VDC for better longevity of the motor at the cost of losing half the amount of speed and torque, compared to running it at 6VDC. That said, the mounted gears give a reduction ratio of 20:1 which means you will get about 20 times the amount of torque you would normally get from the motor itself.
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US$6.93
This is a motor gear reduction box for a 3mm D type shaft. It gives a reduction ratio of 50:1 which means you will get about 50 times the amount of torque you would normally get from the motor itself.  Note: Motor not included.
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US$6.93
This brushed DC motor gear kit is perfect for students and hobbyists for their DIY kits. It is capable of running at 3VDC for better longevity of the motor at the cost of losing half the amount of speed and torque, compared to running it at 6VDC. That said, the mounted gears give a reduction ratio of 2:1 which means you will get about 20 times the amount of torque you would normally get from the motor itself.
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US$6.93
Kit Contents: Propeller: 3 types, Single gear: 8 types, Spindle gear: 9 types, Double gear: 2 types, Pulleys: 6 types, Crown gear: 5 types, Belt: 6 types, Bevel gear: 1 type, Frame: 1 type.
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US$4.19
This pack contains 10 pieces of 12mm size plastic gears. This specific version has 22 outer teeth and 10 inner teeth that is designed to work with 2mm shaft rods. Commonly used for replacement parts on motors or toys.
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US$4.19
This pack contains 10 pieces of 19mm size plastic gears. This specific version has 36 outer teeth and 10 inner teeth that is designed to work with 2mm shaft rods. Commonly used for replacement parts on motors or toys.
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US$11.13
Includes: Spindle gear: 10 pcs (max size is 142A), Crown gear: 10 pcs (max size is C323A), Single gear: 10 pcs (max size is 482A), Double gear: 14 pcs (max size is 46082A), Belt pulley: 7 pcs (max size is 242A), Belt: 10 pcs, Blue motor gear: 9 pcs, Worm gear: 2 pcs, Axle sleeve: 4 pcs, Tooth strip: 4 pcs, Copper teeth: 2 pcs, Bevel teeth: 1 pcs.
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US$11.13
Includes: Spindle straight tooth: 9 kinds (1 each), Crown gear: 11 kinds (1 each), Single gear: 12 kinds (1 each), Double gear: 19 kinds (1 each), Connecting rack: 2 pcs, Belt pulley: 7 kinds (1 each), Worm gear: 2 kinds (1 each), Axle sleeve: 6 pcs, T collar: 1 pcs, Gear-B: 1 pcs, Belt: 5 kinds (1 each).
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US$13.93
This kit includes 58 plastic gears which can be used as spare parts for motor gearboxes. Excellent for tech construction and robotics. 
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US$6.93

This Kit includes 60 plastic gears which can be used as spare parts for motor gearboxes. Kit Contents: Single gear: 8 types, Spindle gear: 9 types, Double gear: 12 types, Pulleys: 7 types, Crown gear: 9 types, Blue motor gear: 2 types, Belt: 4 types, Sleeve: 4 types, Worm gear: 2 types, Rack: 1 type, Copper teeth: 1 type, Bevel gear: 1 type.

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US$16.86
This mini motor gearbox features a more compact 030-form-factor brushed DC motor driving a single gear train that can be assembled to have one of eight gear ratios: 7.5:1, 9.5:1, 15.7:1, 19.9:1, 32.9:1, 41.8:1, 79.1:1, or 87.8:1.
Delivery within 2-3 weeks
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US$16.86
Tamiya’s 4-speed low-speed mini motor gearbox features a more compact 030-form-factor brushed DC motor driving a single gear train that can be assembled to have one of four gear ratios: 71.4:1, 149.9:1, 314.9:1, or 661.2:1. The gear train includes a self-locking worm gear.
Delivery within 2-3 weeks
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US$16.86
The mini-motor gearbox kit from Tamiya makes it easy to get a small robot or plastic model moving. The kit includes one brushed DC motor and all the gears and parts to build any of the twelve possible gear ratio configurations: 4.6:1, 5.1:1, 9.7:1, 10.8:1, 20.4:1, 22.6:1, 42.8:1, 47.5:1, 89.9:1, 99.8:1, 188.7:1, or 209.7:1. 
Delivery within 2-3 weeks
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US$18.84
This can be assembled in 11.6:1 and 18:1 gear ratios. The high-efficiency gearbox is therefore suited for very fast vehicles or other fast mechanisms that do not require high torque.
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US$24.39
This kit includes one brushed DC motor and all the gears and parts to build any of the four possible gear ratio configurations: 39.6:1, 47.6:1, 61.7:1, 74:1. The four gear ratio options give you the flexibility to choose the best speed and torque for your project.
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US$23.48
The primary feature of this gearbox is a worm gear, which locks the output shaft when the motor is not turning. Its high gear ratios of 84:1, 216:1, 555.4:1, and 1428.2:1 make this gearbox appropriate for small walking robots, lifting mechanisms, and other applications where high torque is desired.
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US$15.42

This uses a two motor system to provide power and speed to turn the hex shaft. The Tamiya twin-motor gearbox is a small (3-inch long) plastic gearbox. It contains two small brushed DC motors that drive separate 3mm hexagonal output shafts. 

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US$19.84
This is a versatile, high-efficiency gearbox that you can build in one of the following gear ratios: 11.6:1, 29.8:1, 76.5:1, 196.7:1, 505.9:1, and 1300.9:1. Whatever your application, chances are that one of the configurations will do the job.
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US$18.84
The primary feature is a worm gear, which locks the output shaft whenever the motor isn’t turning. The high gear ratios of 216:1 or 336:1 make this gearbox appropriate for small walking robots, lifting mechanisms, and other applications where high torque is desired.
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US$18.84
This high-power gearbox can be built in a gear ratio of 41.7:1 or 64.8:1, making it well-suited for most vehicles that require a balance of speed and torque.
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US$15.00
The Tamiya single gearbox is essentially half of the Tamiya 70168 double gearbox. The kit can be built with gear ratios of 12.7:1, 38:1, 115:1, and 344:1. There are two possible output axle locations (for any given gear ratio, only one output location is possible).
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US$18.06
This double gearbox packs two independent gear trains into a compact and affordable package that is great for small mobile robots. Each side can be assembled to have one of four gear ratios: 12.7:1, 38:1, 115:1, or 344:1.
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US$15.89
This gearbox has four possible gear ratios, including the highest gear ratio of Tamiya’s gearbox series, 5402:1. The other options are 126:1, 441:1, and 1543:1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning.
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US$16.79
Unlike the other gearboxes in Tamiya’s series, the universal gearbox has a thin metal frame, making it the smallest Tamiya gearbox. The final two gears are metal, making for a tough output. A worm gear allows for the high gear ratio options of 101:1, 269:1, and 719:1.
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US$10.91
This is essentially half of the twin-motor gearbox. The kit comes with enough parts so you can built the gearbox in any of three gear ratios (17:1, 58:1, and 204:1).
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US$25.78
The first in Tamiya’s “high efficiency” series, the planetary gearbox features two 4:1 and two 5:1 stages that can be combined in any way you like—you can even combine two kits to get really huge gear ratios. 
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US$1.49

These new hard plastic wheels are specially designed for our GM2, GM3, GM8, GM9 and GM17 gear motor output shafts. Size: 3.0 x 0.7 x 3.0 cm.

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US$12.45

This unassembled gearbox kit comes with the motor, two sets of gears, metal shafts, gearbox and other accessories. Use a different gear setting and you will have a different speed.

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