Atlas Copco LZB33-L-LR44-11 | LZB33 Vane Air Motor — High Speed, Low-Speed Reversible, Lube-Free

The Atlas Copco LZB33-L-LR44-11 is a lubrication-free, gear-reduced LZB33 vane air motor with a 42 RPM free speed. Fully reversible, standard keyed shaft, 1.55 kg (3.44 lb).

Performance at a Glance

This gear-reduced speed code runs to a free speed of 42 RPM, fully reversible from the air connections, with a maximum permitted shaft torque of 14 Nm (10.3 ft-lb). Atlas Copco does not publish output power or torque-curve data for this gear-reduced build, so we have left those figures off rather than estimate them. Contact us for application sizing.

Technical Specifications

Key Features

• Rotation: Fully Reversible, switchable by reversing air connections, no disassembly required
• Lubrication-Free Vane Design: Lubrication-free vane material eliminates in-line air oilers and prevents lubricant contamination of your process or product — ideal for food, pharma, and clean manufacturing environments.
• ATEX Certified — Ex II 2 G Ex h IIC T6 Gb (gas) and Ex II 2 D Ex h IIIC T85°C Db (dust), to EU Directive 2014/34/EU, for ambient temperatures up to +40°C (104°F). Safe for use in classified areas where electric motors are prohibited.
• Output Shaft — Standard Keyed Shaft: Direct integration into existing drive trains, couplings, sprockets, and IEC/NEMA machine interfaces
• Overload Safe: Stalls harmlessly under overload; self-starts when load is removed — no thermal protection, burnout risk, or electronic fault recovery needed
• Infinitely Variable Speed: Regulate output speed and torque via inlet pressure or flow control valve — no electronic drives or VFDs required
• IP66 Rated: Sealed against dust ingress and powerful water jets for washdown and outdoor installations
• Atlas Copco Quality: Designed and manufactured to ISO 9001 standards; global spare parts and service network with application engineering support

Ideal Applications

• Winch, capstan and spooling drives
• Roll and reel drives
• Conveyor and transfer drives
• Rotary table and indexing drives
• Hazardous area installations requiring ATEX certified pneumatic drives
• Environments where electric motors present ignition, EMI, or water ingress risks

The LZB33 uses Atlas Copco's zero-clearance vane motor design in a compact hardened steel and aluminium housing, giving a slim profile that drops into tight machine layouts without a redesign. Speed is infinitely variable by adjusting inlet pressure or flow, without mechanical governors or electronic drives, and the linear torque-speed curve makes control predictable and repeatable across the working range.

External parts are hardened steel and aluminium. Inlet and outlet hose size 0.4 in.

Part Number: LZB33-L-LR44-11 | EDP: 8411030854 | For dimensional drawings and gear ratio details, see the Atlas Copco Industrial Air Motor Catalogue.