Gear Set, 4-Piece, 12T, 20T, 30T and 40T
4-piece plastic gear set for hobby and science projects.
SKU: GEARSET4
Plastic Spur Gear Set, 4-Piece, 12T, 20T, 30T and 40T, Assorted Colors
This color-coded plastic spur gear assortment supports hands-on construction of light-duty meshed gear mechanisms for educational models, hobby assemblies, and small motorized projects. Different tooth counts allow users to connect compatible shafts, axles, or project supports and observe how motion is transferred between rotating components.
Product Specifications
| Product Type | Plastic spur gear set |
| Package Contents | 1 red 40-tooth gear, 1 yellow 30-tooth gear, 1 blue 20-tooth gear, and 1 green 12-tooth gear |
| Material | Plastic |
| Color Coding | Red, yellow, blue, and green gears for identification by tooth count |
| Compatible Mounting | Small motors, shafts, axles, compatible project supports, and custom mechanical assemblies |
| Duty Rating | Educational models and light-duty mechanisms |
Gear Dimensions
| Gear | Color | Number of Teeth | Approx. Outside Diameter | Approx. Center Bore | Approx. Thickness |
| T40 | Red | 40 | 41.5 mm | 3.2 mm | 5.7 mm |
| T30 | Yellow | 30 | 31.3 mm | 3.2 mm | 5.7 mm |
| T20 | Blue | 20 | 21.3 mm | 3.2 mm | 6.7 mm |
| T12 | Green | 12 | 13.5 mm | 1.9 mm | 6.7 mm |
Caution:
Dimensions are approximate. Verify shaft diameter and fit before permanent installation. The T12 gear has a smaller center bore than the T20, T30, and T40 gears. These gears are not designed for automotive, industrial, or high-load applications.
| Gear | Center Bore | Recommended Axle - Loose Fit | Recommended Axle - Tight Fit |
| T12 | 1.9 mm | Not recommended | 2 mm motor shaft |
| T20 | 3.2 mm | AXLE3MM - 3 mm metal axle | PWHEELSA - Axle Rods For Wheels 1/8 |
| T30 | 3.2 mm | AXLE3MM - 3 mm metal axle | PWHEELSA - Axle Rods For Wheels 1/8 |
| T40 | 3.2 mm | AXLE3MM - 3 mm metal axle | PWHEELSA - Axle Rods For Wheels 1/8 |
Applications and Benefits:
- Demonstrates gear ratios by combining gears with different tooth counts.
- Supports speed reduction experiments in mechanical assemblies.
- Shows speed increase when small and large gears are arranged in suitable drive configurations.
- Illustrates torque multiplication and the relationship between speed and torque.
- Shows how meshed spur gears reverse rotational direction.
- Supports basic power transmission demonstrations.
- Provides reusable components for science experiments and STEM activities.
- Fits classroom engineering activities and mechanical demonstrations.
- Supports small DC motor projects and motorized science models.
- Provides gears for robotics prototypes, hobby mechanisms, custom builds, and light-duty prototypes.
- Availability: In Stock
- Model: GEARSET4
-
Brand:
