FLE42 Economy Planetary Gearbox (≤30 arcmin) for 42mm (NEMA 17) Stepper Motor/BLDC Motor

This FLE42 economy planetary gearbox is designed for 42 mm (NEMA 17) stepper and BLDC motors, featuring a space-saving inline design with a built-in input coupling that accommodates an 5 mm motor shaft. It delivers backlash of ≤30 arcmin for single-stage configurations (≤45 arcmin for two-stage), with reduction ratios from 4:1 to 100:1, rated output torque of 5–12 N·m, and transmission efficiency of 90% (single-stage) or 80% (two-stage). The gearbox handles a rated input speed of 3,000 RPM (max 6,000 RPM), loads of 300 N radial / 100 N axial, and operates at ≤55 dB with IP54 protection and a 20,000-hour lifespan. Its compact 42 mm flange and Φ8 mm keyed output shaft make it a cost-effective choice for applications requiring accurate torque multiplication, such as compact CNC routers, automated indexing and positioning assemblies, packaging machinery, and general industrial automation systems.

General Specification

• Manufacturer Part Number: FLE42
• Product Type: Precision Planetary Gearbox
• Rated Input Speed: 3,000 RPM
• Max. Input Speed: 6,000 RPM
• Max. Radial Load: 300 N
• Max. Axial Load: 100 N
• Noise: ≤55 dB
• Protection Class: IP54
• Lifespan: 20,000 Hours
• Ambient Temperature: -20° to +150°
• Lubrication Type: Lifetime Lubrication
• Output Shaft Type: Keyway
• Output Shaft Diameter: Φ8 mm
• Output Shaft Length: 21.5 mm
• Input Shaft Diameter: Φ4 mm
• Input Shaft Length: Max. 24 mm