The Plastic Spur Gear 80mm 56 Teeth is a yellow plastic spur gear with 80mm outer diameter, 56 teeth, and 6mm circular shaft bore, designed for DIY kit gear train and reduction drive builds. This spur gear is the largest in StemVolt’s spur gear lineup — at 80mm diameter and 56 teeth it delivers the highest gear reduction ratio when driven by a smaller pinion gear, with a 15-tooth pinion from the lineup producing approximately a 3.7:1 reduction, meaning the output shaft turns at roughly one-third the motor speed while multiplying output torque nearly fourfold.
The plastic spur gear 80mm’s size makes it the natural output-stage gear in multi-stage or single-stage reduction builds where maximum torque at the driven shaft is the goal. This large spur gear’s 6mm circular shaft bore fits the standard round 6mm output shafts used across StemVolt’s DC motor lineup, allowing direct installation without adapters. The spur gear’s tooth-count difference against smaller driving pinions determines the transmission ratio — builders can calculate output RPM by multiplying motor RPM by the pinion 56 tooth
the spur gear for diy kit in plastic has a lower load limit than metal equivalents of the same size — the larger 80mm diameter also means more leverage on individual teeth under load, so this gear suits moderate-torque DIY builds rather than sustained heavy industrial drives. Available from StemVolt, this unit is suitable for engineers working on high-reduction gear train builds and practical large spur gear DIY kit projects.
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Features:
- Large spur gear in lineup 80mm diameter for maximum reduction
- 6mm circular shaft bore fits standard DC motor output shafts
- Yellow plastic lightweight construction for DIY kit builds
- Parallel shaft spur tooth profile for smooth driven-gear operation
Technical Specifications:
Applications:
- Spur Gear used for DC motor output stage high reduction drive
- College project uses large spur gear for tooth ratio calculation demo
- robot uses plastic spur gear 80mm for slow high-torque joint
- DIY gearbox uses 56 teeth spur gear for multi-stage reduction build
- Science kit uses spur gear for diy kit for gear train model project
Package Includes:
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1 × Plastic Spur Gear 80mm 56 Teeth
Gurbaksh Dhillon –
Helpful staff and guidance
Wridhiman Saha –
Original product received
Kamal Mishra –
Impressed with the quality
Sathyamoorthy Ramakrishnan –
Bubble wrap packing was excellent
Aneesh Kher –
The plastic spur gear is a great addition to any DIY electronics or mechanical project. It arrived securely packed, matched the specifications perfectly, and proved to be a dependable component for educational models and robotics applications.
Arabinda Bhattacharya –
Multiple payment options available