Atlas Copco LZB34-RL-LR44-11 | LZB34 Vane Air Motor — High Speed, Low-Speed Reversible, Stainless Steel

The Atlas Copco LZB34-RL-LR44-11 is a lubrication-free LZB34 stainless steel gear-reduced vane air motor with a 42 RPM free speed. Fully Reversible, standard keyed shaft with a 12 mm shaft diameter, 1.75 kg (3.86 lb).

Performance at a Glance

This gear-reduced build turns at 42 RPM free. 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. Max permitted torque on the output shaft is 14 Nm (10.3 ft-lb), which is a shaft limit and not a performance rating. Suited to valve and gate operators, slow indexing and heavy-product agitation.

Technical Specifications

Key Features

• Rotation: Fully Reversible—switchable by reversing air connections, no disassembly required
• Stainless Steel Construction: Stainless steel external parts resist corrosion in washdown, food-grade, and chemical environments.
• 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, 12 mm diameter: 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

• Indexing and rotary table drives
• Slow-speed agitators for heavy and viscous product
• Valve, gate, and damper operators
• Washdown process equipment needing a slow stainless drive
• Hazardous area installations requiring ATEX certified pneumatic drives
• Environments where electric motors present ignition, EMI, or water ingress risks

The LZB34 uses Atlas Copco’s zero-clearance vane motor design in a long, slim stainless steel housing, giving a profile that drops into tight machine layouts without a redesign. This build pairs that motor with an integral gear reduction, so output speed is set by the gear stage rather than by a speed code, while inlet pressure or flow still trims it without mechanical governors or electronic drives.

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

Part Number: LZB34-RL-LR44-11 | EDP: 8411034351 | Performance data at 6.3 bar (91 psi). For full performance curves and dimensional drawings, see the Atlas Copco Industrial Air Motor Catalogue.