[One] VTV 90JB 50G12 Gear Box - 90JB50G12

VTV 90JB50G12 Gear Box (1:50 Ratio, 90mm Frame)

The VTV 90JB50G12 Gear Box is a precision-engineered, heavy-duty speed reducer designed for industrial micro-motor applications. Featuring a standard 90mm x 90mm frame footprint and a 1:50 reduction ratio, it is purpose-built to convert high-speed motor rotation into manageable, high-torque output, making it an essential component for automated conveying and motion control systems.

Manufactured with hardened alloy steel gears and high-quality ball bearings, the 90JB series ensures low-noise operation and exceptional durability under continuous loads. Equipped with a standard 12mm keyed output shaft, this gearbox seamlessly pairs with standard 60W, 90W, and 120W AC or DC micro-motors, providing reliable power transmission for packaging machinery, food processing conveyors, and assembly line automation.

Detailed Technical Specifications

Industrial Application & Power Transmission

The 1:50 gear ratio hits the "sweet spot" for many industrial automation tasks, balancing slow, controlled movement with a substantial multiplication of motor torque.

• Conveyor Systems: Reduces a standard 1400 RPM motor down to a highly manageable 28 RPM, providing smooth, steady tracking for product assembly lines and packaging belts.
• Material Mixers & Agitators: Delivers the high rotational force (torque) necessary to stir viscous liquids or granular materials without stalling the base motor.
• Rotary Actuators: Perfect for indexing tables and automated doors where precise, high-torque positioning is required over rapid speed.

Maintenance & Troubleshooting FAQ

1. Can I attach this VTV 90JB gearbox to any brand of motor?
The gearbox is designed to fit standard metric 90mm frame micro-motors. However, the critical compatibility factor is the motor's pinion shaft. The helical/spur gear cut on the motor shaft must perfectly match the internal receiving gear of the VTV 90JB. If the teeth profile or module differs, it will cause severe grinding and immediate failure. It is highly recommended to pair VTV gearboxes with VTV motors.

2. The gearbox is emitting a loud grinding noise during operation.
Excessive noise usually stems from one of three issues: First, check if the load exceeds the gearbox's permissible torque, causing gear tooth deflection. Second, radial overload on the 12mm output shaft (e.g., from an over-tightened drive chain or belt) can damage the internal ball bearings. Third, internal grease may have degraded or leaked out over years of heavy use.

3. How do I fix grease leaking from the output shaft?
Leakage at the 12mm output shaft indicates that the internal oil seal has failed, typically due to excessive operating temperatures, radial shaft stress, or simply age. You will need to unmount the gearbox, remove the retaining ring (circlip), and press in a new appropriately sized lip seal. Ensure you repack the gears with high-grade industrial gear grease before reassembly.