Pneumatic radial piston motor

Maximum Performance, Minimal Consumption – The EasyDrive Advantage

PTM’s pneumatic radial piston motors are engineered with efficiency, flexibility, and durability in mind. At the heart of these motors is the radial piston principle, optimized to drastically reduce compressed air usage—by up to 90% compared to vane motors—while still delivering exceptional torque from startup.

Instead of using connecting rods or crankshafts, EasyDrive motors feature pistons arranged radially in a star configuration, rolling along an internal curve. Compressed air is precisely supplied and exhausted via a central rotating control ring and a fixed shaft. This design allows maximum torque output right from the start, with torque decreasing as speed increases—an energy-efficient approach that minimizes waste.

Key Performance Features

• Full-load start/stop and direction change capability
• Max torque available at startup
• Overload-proof design
• Low noise operation
• Explosion protection (Directive 94/9/EC) – optional
• IP67/IP68 and stainless steel versions – optional
• Energy savings of up to 90% vs. vane motors

Modular Power in Five Classes

EasyDrive motors come in two sizes with five torque classes:

• 450 Ncm
• 900 Ncm
• 1800 Ncm
• 3600 Ncm
• 7200 Ncm

This modular concept allows compact design and flexible adaptation to space constraints and performance needs.

Gear Options and Mounting Flexibility

For precise speed or torque adjustments, PTM offers custom planetary gear units with gear ratios of 3:1, 9:1 (reduction), and 1:2 (increase). Multiple mounting options—including flanges and brackets—support easy installation even in confined or challenging setups.

Designed for Tough Conditions

PTM’s radial piston motors are available in FDA-compliant versions, using electrochemically polished V4A (1.4404) stainless steel for superior corrosion resistance. These are ideal for food, beverage, and pharmaceutical applications. Additional variants with IP68 rating and explosion-proof certification make them suitable for underwater use or explosive environments.