The Pully Plastic U-Grooved Dia 50mm-Width 13mm, with a 6mm inner bore hole, yellow plastic construction, featuring a U-shaped groove around the rim. This u groove pulley differs from flat-rim and V-groove pulleys covered separately — the U-shaped channel is specifically shaped to seat and retain a round belt, O-ring, or round elastic cord within the groove profile, preventing the belt from sliding off the rim during operation at the modest speeds typical of toy and DIY motor drives.
The u groove plastic pulley’s 50mm outer diameter is significantly larger than the 26mm toy motor pulley covered separately — when paired with a smaller driving pulley on a motor shaft, this larger 50mm pulley reduces output shaft speed and multiplies torque by a ratio proportional to the diameter difference, making it useful in gear-down belt transmission stages for DIY robot drives. This plastic pulley wheel’s 6mm inner bore hole mounts on standard 6mm axles, shafts, and the output shafts of common hobby DC motors used in toy and educational robot builds.
A pulley for round belts, the U-groove profile retains round belts well but is not suited for flat belts or toothed timing belts, which require different rim profiles — using a flat or timing belt in this groove would cause belt slippage or misalignment. Available from StemVolt, This 50mm plastic U-grooved pulley is suitable for DIY robotics projects, educational models, and mini motion applications.
Related Products:
- Checkout Pully 26mm x 12mm DC Toy Motor
Features:
- U-groove profile seats round belts and O-rings securely in groove
- Friction drive provides natural overload slip protection
- 50mm diameter allows flexible 1:1 or reduction pairing options
- Lightweight yellow plastic for low-inertia motor builds
- U-groove rim prevents round belt side-slipping during operation
Technical Specifications:
Applications:
- U-Groove Pulley used for DIY friction belt drive robot build
- College project uses Mini pulley wheel for 1:1 and ratio demo
- Science kit uses plastic pulley wheels for India school drive demo
- Toy motor uses pulley for dc motor for O-ring belt transmission
- DIY crane uses small pulley wheel for round belt lifting mechanism
Package Includes:
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1 x Pully Plastic U-Grooved Dia 50mm-Width 13mm
Bratya Basu –
This is a great choice for DIY mechanical and robotics projects. It arrived in perfect condition, matched the product description accurately, and performed reliably in my prototype setup.
Devansh Barua –
Product exactly as shown
Rishit Chakraborty –
Express delivery service
Pinarayi Vijayan –
Perfect condition on arrival
Madhav Srinivas –
Very happy with the purchase