Do you need air motors up to 4.4 kW power by Mannesmann Demag?

Air Motors with Angle Gearbox: Precise, Oil-Free, Corrosion-Resistant

Angle motors combine compact designs with direct power transmission. Our oil-free stainless steel air motors from Mannesmann Demag offer an integrated angle gearbox as standard, reliably transmitting loads in confined spaces. The design is aimed at applications in food, pharmaceutical, and chemical production, as well as classic mechanical engineering companies that require an oil-free drive to avoid product contamination and extensive post-cleaning.

Key Features and Technical Specifications

The motors are available in various power classes up to 1.2 kW and deliver graduated torques through different gear ratios of the angle gearbox. Typical speeds are in the low to medium rpm range, with the gearbox designed for long service life and constant torque in both stationary and intermittent operation. Important manufacturing materials include stainless steel (AISI 316 / V4A) for housings and shaft parts, bronze or ceramic bushings in the bearing points to minimize corrosion, and PTFE or Viton seals for airtightness in purity-critical processes.

The design of the angle gearboxes is based on low-maintenance principles: straight-cut or helical bevel gears with hardened raceways ensure definable noise and efficiency values. Gear quality and lubrication concept have been specially optimized for oil-free environments, often through the use of solid-lubricating materials or hermetic encapsulations that prevent particle release.

Connections, Mounting, and Integration

Angle motors are available with standardized flange and shaft connections, as well as various mounting hole patterns, to enable direct machine integration. Air connections often comply with ISO or DIN standards; options include straight and angled quick connectors to minimize pressure losses in the supply system. The motors are designed for horizontal and vertical installation; important mounting instructions concern the bearing load of the output shaft and the alignment of the air supply to prevent condensation in sensitive areas.

For control, integrated control valves or external proportional valves can be used to fine-tune speed and start-up behavior. For applications with frequent load changes, a combination of pressure regulation and check valves is recommended to optimize switching times and smooth operating cycles.

Materials, Seals, and Surface Treatment

The focus is on corrosion-resistant materials. In addition to AISI 316, ceramic sliding elements are used at critical contact points to avoid foreign contaminants. Sealing systems consist of high-performance plastics such as PTFE, PEEK, or Viton, depending on the temperature range and chemical exposure. Surfaces are bright-turned or electrochemically passivated to reduce cleaning effort and prevent adhesion. Special surface treatments and antistatic options are available for explosion-proof areas.

Maintenance, Service Life, and Cost Considerations

Air motors with angle gearboxes are designed for low maintenance intervals. Maintenance steps are generally limited to visual inspection, filter changes of the compressed air supply, and, if necessary, replacement of wear seals after defined operating hours. The effective service life depends on the load profile, filter quality, and mounting; in corrosive environments, stainless materials and hermetic seals significantly reduce the probability of failure. Such solutions are particularly economical where product purity compensates for higher maintenance and cleaning costs.

Practical Examples: Specific Applications

Filling plant in food production: A stainless steel angle motor drives an agitator in a wet filling station. The oil-free design prevents lubricant contact with food. The motors are mounted laterally on the container; the angle gearbox transmits the torque to the vertical agitator shaft. In this configuration, the air supply is routed through an inline filter and a pressure regulator that controls the stirring speed depending on the filling volume. The seals are made of PTFE, and the gearbox is hermetically encapsulated to withstand cleaning processes with aggressive media.

Assembly line in electronics manufacturing: Smaller angle motors replace electric drives at screwing stations to prevent sparking. The compact angle geometry allows for installation in narrow stations. The motors operate with an external proportional valve for torque adjustment, which quickly switches for different screwing parameters. Valve and air treatment units are mounted close to the station to minimize pressure losses.

Corrosive environment in a chemical plant: An angle motor in AISI 316 drives a dosing system for aggressive media. Ceramic sliding elements and Viton seals ensure resistance to solvents. The motor installation includes additional support bearings to reduce axial force input into the output shaft. Regular inspection cycles of the air filters prevent particle ingress, and monitoring of compressed air consumption detects leaks early.

Selection Criteria: How to Determine the Right Model

For selection, the combination of required torque, speed range, ambient conditions, and installation space is crucial. Deviating requirements such as explosion-proof design, special sealing materials, or special shaft shapes (e.g., hexagonal, cylindrical, keyed) must be communicated with the inquiry. Equally important are details about the compressed air source: achievable operating pressure, maximum air humidity, and presence of oil mist influence service life and performance.

Further technical details and supporting documents can be found in our technical section at maku-industrie.de/technik. Practical application reports and reference solutions are available at maku-industrie.de/anwendungsbeispiele.

Typical Designs and Connection Variants

Angle motors are available as flange-mounted versions with axially or radially offset output shafts, as well as compact block solutions with integrated air treatment. Connection variants include standardized vacuum and pressure connections, SAE and BSP threads, and quick couplings. Options for speed and torque limitation can be integrated ex works to prevent overloads. On request, specified characteristic curves for power output and helical gear data are available.

Safety and Standards

Our air motors comply with relevant industry and hygiene standards; documentation on material conformity (REACH, FDA-related statements for materials) is available on request. For explosion protection and cleaning-intensive areas, corresponding certifications and test reports are available. Mounting and maintenance instructions are part of the delivery to ensure safe integration and continuous operation.

Performance Metrics and Comparison Criteria

Relevant metrics include specific torque per kg motor weight, efficiency of the angle gearbox, no-load speed at nominal air pressure, and compressed air consumption at nominal torque. Characteristic curves and test protocols are helpful for engineering decisions. We provide measurement data on temperature development under load, noise levels, and service life tests on request.

• Important selection parameters: Power (up to 1.2 kW), desired torque, mounting type, material requirements, sealing materials, air connection standards

FAQ

1. Are the angle motors truly oil-free and how is lubrication ensured in the gearbox?

The motors operate without external oil supply; lubrication is provided by solid-lubricating materials and hermetically encapsulated sliding surfaces. For special load profiles, low-maintenance lubricants approved for use in oil-free production lines are used within the gearbox.

2. Which sealing materials are suitable for aggressive media?

Viton and PTFE are standard options for aggressive media; for high temperatures or special chemicals, PEEK-based solutions or ceramic sliding elements are used. The selection depends on media compatibility, temperature range, and mechanical stress.

3. What information does technical sales need for a customized offer?

For a precise offer, we need: required torque and speed, installation dimensions, desired shaft shape, ambient conditions (temperature, humidity, chemicals), available compressed air parameters (pressure, quality, oil content), special certification requirements, and operating cycle. Based on this, we determine suitable gear ratio, sealing materials, and mounting options.