Atlas Copco TZB25-L-A0012-14 | TZB25 Turbine Air Motor — Low Speed, Clockwise, ¾″ Shaft

The Atlas Copco TZB25-L-A0012-14 is a TZB25 turbine air motor with a maximum speed of 120 RPM, delivering 2.7 kW (3.6 hp) and 230 Nm (170 ft-lb) at its 110 RPM max-output point. Clockwise rotation, keyed 19.05 mm (¾ in) shaft, 5.3 kg (11.7 lb).

Performance at a Glance

This speed code reaches 120 RPM maximum and does its useful work at 110 RPM, where it makes 2.7 kW (3.6 hp) and 230 Nm (170 ft-lb). Minimum starting torque is 440 Nm (325 ft-lb), so it starts under load and stalls harmlessly rather than tripping. Atlas Copco publishes two stall torque figures for this part number that do not agree with each other, so we have left stall torque off rather than publish a number we cannot stand behind. Contact us before sizing to stall. Air consumption at maximum output is 40 l/s (85 cfm). Suited to heavy agitation, slow-speed feed drives and large valve actuation.

Technical Specifications

Key Features

• Max Output Power: 2.7 kW (3.6 hp) at 110 RPM — rated for continuous-duty operation in fixed-plant and automation environments
• Rotation: Clockwise—factory-set for consistent directional performance
• Turbine Drive: Air consumption at maximum output is 40 l/s (85 cfm), the same figure Atlas Copco publishes for every TZB25 speed code; the speed code is what sets how the motor's output is divided between shaft speed and torque.
• ATEX Certified — Ex II 2 G Ex h IIC T4 Gb X (gas) and Ex II 2 D Ex h IIIC T135°C Db X (dust), to EU Directive 2014/34/EU. Safe for use in classified areas where electric motors are prohibited.
• Output Shaft — Keyed, 19.05 mm (¾ in), loading code h: Direct integration into existing drive trains, couplings, sprockets, and 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

• Heavy agitator and paddle mixer drives in process vessels
• Slow-speed screw, auger and feeder drives
• Large-bore valve, damper and gate actuation
• Rotary table, turntable and positioner drives
• Hazardous area installations requiring ATEX certified pneumatic drives
• Environments where electric motors present ignition, EMI, or water ingress risks

The TZB25 is a turbine air motor in a hardened steel and aluminium housing, sealed to IP66 and ATEX certified for both gas and dust atmospheres. Atlas Copco publishes the same 40 l/s (85 cfm) air consumption and the same 7 bar (101 psi) maximum working pressure across the whole TZB25 range, so on a given build it is the speed code that sets the balance between shaft speed and torque. This unit ships without a speed sensor.

Air consumption at maximum output is 40 l/s (85 cfm). External parts are hardened steel and aluminium. Inlet hose size 0.6 in (16 mm). Atlas Copco does not publish an outlet hose size for this family.

Part Number: TZB25-L-A0012-14 | EDP: 8411310024 | Maximum working pressure 7 bar (101 psi). For full performance curves and dimensional drawings, see the Atlas Copco Industrial Air Motor Catalogue.