A locking kit specifically designed for 14 mm diameter, high-speed hub motors. Whether you ride a folding electric scooter, a commuter electric bicycle, or a small electric motorcycle, upgrading your motor shaft in just 10 seconds completely solves three common after-sales problems: loose nuts, shaft end corrosion, and dropout wear.
2. Kit Details:
High-strength steel locking nuts ×2 (M14×1.5 threads on both sides)
Anti-drag washers ×2
2 mm thick stainless steel bushing washers ×2
Oil-resistant NBR rubber dust covers ×2
Portable and space-saving.
3. Core Materials and Craftsmanship:
Nuts: 45# steel, integrally cold-forged, 12.9 tensile strength, 8 μm zinc-nickel plating, no red rust after 72 hours of salt spray testing.
Washers: 65Mn spring steel, 120° serrated chamfer, providing ≥28 N·m anti-loosening torque.
Rubber cover: NBR oil-resistant rubber, does not harden at -40℃ to +120℃, IP54 dustproof and waterproof rating.
Busset: 304 stainless steel, CNC machined in one piece, roundness ≤0.02 mm, preventing hard friction between the motor shaft and the frame.
4. Compatible Models (14 mm Axle Diameter)
Electric Scooters: 10-inch, 11-inch, 13-inch electric scooters
Electric Bicycles: 14-inch 250 W-500 W front/rear hub motors, folding bikes, shared bikes, delivery bikes
Small Electric Motorcycles: 135 mm dropout, M14×1.5 threaded hub motor
5. Installation in 4 Steps
Remove the old nut and clean the motor shaft threads.
First, place the serrated washer → then tighten the steel nut, torque 25-30 N·m.
If a wider dropout is needed, insert the 2 mm stainless steel bushing into the right dropout.
Snap on the rubber dust cover and tighten – no tools, no glue, and no loosening.
6. Performance Enhancement
Anti-loosening: The serrated washer engages the nut with the frame, ensuring zero loosening on 300 km off-road terrain.
Rust prevention: Zinc-nickel + rubber double seal, no rust spots on the nut after 6 months of riding at the beach.
Abrasion prevention: The stainless steel bushing isolates the aluminum... Dropout prevents motor shaft seizure and extends frame life.
Silence: Eliminates clearance between the shaft and frame, reducing bumps and noises for a quieter ride.
7. Technical Parameters
Thread Specification: M14×1.5 (commonly fine thread)
Across Flats: 17 mm (uses a standard 17 mm open-end wrench)
Temperature Range: -40 ℃ ~ +120 ℃
Corrosion Resistance: Neutral salt spray 72 h
Applicable Torque: 25-30 N·m (Do not exceed 35 N·m to avoid stripping)