Atlas Copco LZL35-BF322-B-011 | LZL35 Vane Motor + 2-Stage Helical Gearbox — 11.2:1 Ratio, Type-B-Type

The Atlas Copco LZL35-BF322-B-011 is an LZL35 six-vane air motor on an 11.2:1 helical gear unit, turning 415 RPM free at the output shaft and delivering 5.0 kW (6.7 hp) with 216 Nm (159 ft-lb) at its 221 RPM max-output point. Fully reversible, flange mounted, standard keyed shaft, 34 kg (75 lb).

Performance at a Glance

Gearing of 11.2:1 brings the output shaft to 415 RPM free speed, with useful work around 221 RPM, where it makes 5.0 kW (6.7 hp). Minimum starting torque at the output shaft is 340 Nm (251 ft-lb) and stall torque is 432 Nm (320 ft-lb), so it starts under load and stalls harmlessly rather than tripping. Maximum radial load at the output shaft is 2,810 N. Suited to mixing, conveyor, pump and tension-control duty.

Technical Specifications

Key Features

• Max Output Power: 5.0 kW (6.7 hp) at 221 RPM — rated for continuous-duty operation in fixed-plant and automation environments
• Rotation: Fully Reversible—switchable by reversing air connections, no disassembly required
• Helical Gear Unit: 11.2:1 reduction in a flange mounted housing, driven through a standard IEC interface so the motor can be replaced without disturbing gear alignment
• Not ATEX Certified — Atlas Copco publishes no ATEX certification for this gear unit build. For a classified area, specify a certified direct-drive LZL motor instead.
• 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
• Atlas Copco Quality: Designed and manufactured to ISO 9001 standards; global spare parts and service network with application engineering support

Ideal Applications

• Mixing and agitator drives
• Conveyor and belt drives
• Pump and auger drives
• Tension control and winding duty
• Torque-intensive gear-driven machinery
• Environments where electric motors present ignition, EMI, or water ingress risks

The LZL uses Atlas Copco's six-vane direct-drive motor design, with vane sealing obtained through a combination of vane air pressure and interconnecting pins, so the vanes are seated at start-up and starting torque is repeatable cycle to cycle. Here the motor drives a helical gear unit through a standard IEC interface, so the motor can be replaced in the field without disturbing gear alignment. Atlas rates the LZL for speed regulation down to 10% and torque down to 20% of maximum, set from the air supply alone.

Air consumption at maximum output is 129 l/s (273 cfm). External parts are powder coated cast iron and aluminium. Inlet hose size 1.25 in (32 mm), outlet hose size 1.25 in (32 mm).

Part Number: LZL35-BF322-B-011 | EDP: 8411181335 | Performance data at 6.3 bar (91 psi). For full performance curves and dimensional drawings, see the Atlas Copco Industrial Air Motor Catalogue.