When sourcing low speed air motors, you must prioritize torque output and rotational stability. For industrial use, ensure the motor provides high stall torque to prevent mechanical failure under load. For dental or medical applications, look for motors with a speed range of 100 to 20,000 RPM and ensure they feature E-type international standard connections for compatibility with various handpieces. Additionally, verify the air consumption (L/min) to ensure your existing compressor system can support the pneumatic demand without pressure drops.