Aluminium body worm gearboxes are compact, quiet and economical power transmission solutions for systems requiring low speed and high torque. Supplied with the HEM Motor manufacturer guarantee, these gearboxes provide high reduction ratios in a single stage and are delivered quickly from stock.

Alüminyum Gövde Sonsuz Dişli Redüktörler

Technical Specifications

  • Gear design: One worm screw and one bronze worm wheel; the motor-driven worm screw turns the bronze wheel and transmits motion to the output shaft
  • Single-stage reduction ratios: 1/7 – 1/10 – 1/20 – 1/30 – 1/50 – 1/80 – 1/100
  • Example output speed: with a 1400 rpm motor and a 1/30 ratio, the output speed is approximately 46 rpm
  • Most preferred ratios: 1/10, 1/20, 1/30, 1/40, 1/50, 1/60
  • Housing material: Aluminium housing (light, economical, suitable for small powers); cast iron housing alternative for heavy duty
  • Common frame sizes: NMRV 30 – NMRV 40 – NMRV 50 – NMRV 63 – NMRV 75 – NMRV 90 – NMRV 110 – NMRV 130 – NMRV 150
  • Compatible motor powers: 0.12 kW, 0.18 kW, 0.25 kW, 0.37 kW, 0.55 kW, 0.75 kW, 1.1 kW, 1.5 kW, 2.2 kW, 3 kW, 4 kW
  • Motor mounting types: B3, B5, B14

Housing Types and Models

Housing TypeAdvantagesTypical Models
Aluminium housingLight, economical, suitable for small powersNMRV 30, NMRV 40, NMRV 50, NMRV 63
Cast iron housingMore durable, vibration-resistant, suitable for heavy dutyNMRV 90, NMRV 110, NMRV 130, NMRV 150 and above

The most widely used models are the NMRV 30, NMRV 40, NMRV 50, NMRV 63, NMRV 75, NMRV 90, NMRV 110, NMRV 130 and NMRV 150 frame sizes. The corresponding HEM30, HEM40, HEM50, HEM63, HEM75, HEM90, HEM110 and HEM130 worm gearboxes are available from our stock.

Key Features

  • Very high reduction ratios up to 1/100 in a single stage
  • Low vibration, low noise and smooth running thanks to the shock-free worm drive
  • High ratios in a smaller volume than helical gearboxes; an advantage in machines with limited space
  • Self-locking capability at certain ratios: when the motor stops, the load cannot back-drive, drop or reverse the system (an advantage for lifting systems, inclined conveyors and door systems)
  • More economical and more readily available than helical gearboxes
  • Easy handling and installation thanks to the lightweight aluminium housing

Applications

  • Conveyor systems (low speed, high torque)
  • Packaging machines (quiet operation advantage)
  • Automation systems
  • Door mechanisms (self-locking advantage)
  • Mixers (low-speed mixing)
  • Food machinery (vibration-free operation)
  • Textile machinery (smooth motion)
  • Small crusher systems
  • Crane auxiliary mechanisms
  • Fan, ventilation and handling systems (low speed control)

Gearbox Selection

When selecting a worm gearbox, the following criteria should be evaluated together:

  • Actual ratio and output speed
  • Output shaft diameter
  • Housing material (aluminium or cast iron)
  • Bearing and bronze wheel quality
  • Oil type
  • Duty time and service factor
  • Motor mounting dimensions

Due to the worm gear design, efficiency is lower than that of helical gearboxes; heat build-up and energy losses may increase at high ratios. For industrial applications running continuously under very heavy loads, helical or planetary gearboxes may be more advantageous.

Lubrication and Maintenance

Since worm gearboxes operate with sliding friction, oil quality is critical. Synthetic gear oil or EP-additive oils are generally preferred. Poor-quality oil increases wear, damages the bronze wheel and raises operating temperature. As the housing temperature can rise under prolonged full load, using quality oil directly affects gearbox life.

Stock and Ordering

Aluminium body worm gearboxes are delivered quickly from stock with the HEM Motor manufacturer guarantee. For pricing and quotations, call us at +90 (532) 345 49 86 or reach us via our contact page.