PLF120-MA Low-Backlash Precision Planetary Gearbox (≤7 arcmin) for 110mm (NEMA 42) Stepper Motor

This PLF120-MA precision planetary gearbox is engineered for 110 mm (NEMA 42) stepper and BLDC motors, featuring a space-saving inline design with a built-in input coupling that accepts a Φ19 mm motor shaft (max. 57 mm length) and a Φ25 mm keyed output shaft (50 mm length). It delivers low-backlash gearing of ≤7 arcmin (single-stage) or ≤12 arcmin (two-stage), with reduction ratios from 3:1 to 100:1, rated output torque of 90–210 N·m, and transmission efficiency of 96% (single-stage) or 94% (two-stage). The gearbox handles a rated input speed of 3,500 RPM (max. 6,000 RPM) and loads of 1,500 N radial / 1,200 N axial, operating at ≤55 dB with IP65 protection, lifetime lubrication, a 20,000-hour lifespan, and an ambient temperature range of -20°C to +150°C; the single-stage version measures 146.5 mm in length and 8.0 kg, while the two-stage version is 179 mm and 9.5 kg. Its 120 mm frame, IP65 sealing, and low-backlash precision make it well suited to heavy-duty motion axes in large CNC routers and engraving machines, industrial robotics, automated production lines, packaging machinery, and laser processing equipment requiring reliable torque multiplication and accurate positioning from a NEMA 42 (110mm) platform.

PLF120-MA General Specification

• Manufacturer Part Number: PLF120-MA
• Product Type: Precision Planetary Gearbox
• Rated Input Speed: 3,500 RPM
• Max. Input Speed: 6,000 RPM
• Max. Radial Load: 1,500 N
• Max. Axial Load: 1,200 N
• Noise: ≤55 dB
• Protection Class: IP65
• Lifespan: 20,000 Hours
• Ambient Temperature: -20° to +150°
• Lubrication Type: Lifetime Lubrication
• Output Shaft Type: Keyway
• Output Shaft Diameter: Φ25 mm
• Output Shaft Length: 50 mm
• Input Shaft Diameter: Φ19 mm
• Input Shaft Length: Max. 57 mm