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Plastic Gears (5 Types)
Plastic Gears (5 Types) 5Types plastic gears. These gears are incredibly useful – they can be used to create custom gearboxes to transfer motion, change output shaft speed, increase torque, and any number of other gear-like functions. Different types of gears have different purposes...

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75 pcs-lot different type mini gear Plastic Gear Set
75 pcs-lot different type mini gear Plastic Gear Set Gears are incredibly useful - they can be used to create custom gearboxes to transfer motion, change output shaft speed, increake torque, and any number of other gear like functions. Different types of gears have...

Rs. 210

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Gear Ratio & Torque – Quick Guide

Gear ratio tells how many turns the motor makes for one turn of the output gear.

Formula: Gear Ratio = Driven Gear Teeth ÷ Driving Gear Teeth.

Example: 10T → 40T = 4:1, meaning the motor spins 4 times for 1 wheel rotation.

Higher gear ratio (4:1, 5:1) = slower speed but higher torque → good for climbing, lifting, heavy robots.

Lower gear ratio (1:1, 2:1) = faster speed but lower torque → good for fast robots and RC cars.

Torque relationship: Output Torque ≈ Input Torque × Gear Ratio (minus small losses).

Example: 0.5 kg·cm motor torque × 4:1 → ~2 kg·cm output torque.

Choose gear ratio based on whether your project needs speed or power.

Step-by-Step: Motor Assembly with Gears

Select the Motor & Gear Type

Choose a DC/gear motor suitable for the load.
Pick matching gears (spur, bevel, or pinion + gear) with the right bore size.

Fit the Pinion Gear on the Motor Shaft

Slide the small gear (pinion) onto the motor shaft.
Use a set screw or press-fit to secure it firmly.
Ensure it sits straight and does not wobble.

Mount the Driven Gear on the Output Shaft/Wheel

Fix the larger gear on the axle, wheel shaft, or intermediate shaft.
Use a hub, coupler, or set screw to lock it in place.

Align the Gears

Position motor and shaft so that the teeth fully engage but are not too tight.
There should be a tiny amount of play to avoid friction and noise.

Secure Motor & Shafts to the Chassis

Use mounting brackets, screws, or 3D-printed holders.
Ensure the gears maintain alignment even under load.

Test the Assembly

Slowly power the motor.
Check for smooth rotation, no slipping, and no unusual noise.
Adjust spacing or alignment if there is binding or skipping.

Comparison of Gear Sizes & Materials

Gear Size (Teeth & Diameter)

Feature	Small Gears (Few Teeth)	Large Gears (More Teeth)
Speed Effect	Higher speed, lower torque	Lower speed, higher torque
Use Case	High-speed stages, intermediate stages	Final drive stages, high-torque applications
Placement	Close to motor	On wheels, arms, heavy load points

Gear Materials

Material	Characteristics	Typical Use Cases
Plastic (Nylon/ABS)	Lightweight, low noise, low cost, less durable	Educational kits, small robots, light loads
Brass	Good strength, smooth operation, moderate wear	Hobby gearboxes, servo mods, medium loads
Steel	Very strong, durable, higher noise, heavier	High-torque robots, heavy-duty mechanisms
Aluminium	Lightweight, stronger than plastic, less wear than plastic	Drones, light robotics, custom CNC parts

Applications in Robotics & Mechanical Projects

Line-following & obstacle-avoiding robots : Use gearboxes and spur gears to slow down the motor and increase torque for controlled movement.

Robotic arms & grippers : Gears and pulleys help increase torque at the joints, allowing the arm to lift small objects smoothly.

RC cars & battle bots : Adjust gear ratio to balance speed and push force (torque) based on track and load.

Conveyor belts & DIY mechanisms : Pulleys and belts transfer motion from the motor to different shafts quietly and with less vibration.

CNC / 3D printer mechanisms : Timing belts and pulleys help in precise linear motion for X/Y axes.

Passive Buzzer Module 3.3V-5V DC

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Really good filament with no moisture and printed perfectly

The module is working fine i wished you guys had a soldered one and i think you missed the anntena for this module so make sure to provide one with this module

Delivery and quality

Delivery in one day excellent
Product quality is good

Good Product

Good product and fast courier services. It was good experience ordering from Robocraze

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All About Plastic Motor Gears, Belts & Pulleys

Gear Ratio & Torque – Quick Guide

Step-by-Step: Motor Assembly with Gears

Comparison of Gear Sizes & Materials

Gear Size (Teeth & Diameter)

Gear Materials

Applications in Robotics & Mechanical Projects

Frequently Asked Questions

1. Are these gears compatible with DC motors?

2. Can I use these belts and pulleys for robotics projects?

3. Are these available in bulk or individual pieces?

Let customers speak for us

All Categories

Plastic Motor Gears, Belts & Pulleys

Categories

Refined By Clear all

Availability

Price

Featured Products

Sort by:

Recently Viewed Products

All About Plastic Motor Gears, Belts & Pulleys

Gear Ratio & Torque – Quick Guide

Step-by-Step: Motor Assembly with Gears

Comparison of Gear Sizes & Materials

Gear Size (Teeth & Diameter)

Gear Materials

Applications in Robotics & Mechanical Projects

Frequently Asked Questions

1. Are these gears compatible with DC motors?

2. Can I use these belts and pulleys for robotics projects?

3. Are these available in bulk or individual pieces?

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