Hengfengtai CORT-20E Precision Cycloidal Reducer

MANUFACTURER DOCUMENTATION

Overview

The CORT-20E table rates output torque against output speed. At the catalog rated output speed of 15 rpm, torque is 170 Nm; higher low-speed values and momentary limits should be assessed separately.

Read original manufacturer specification ↗

Published series specifications

Series ranges describe the product family. They are not interchangeable operating points.

Shaft-rotation ratios: 57 / 81 / 105 / 121 / 141 / 161
Housing-rotation ratios: 56 / 80 / 104 / 120 / 140 / 160
Rated torque at 15 rpm: 170 Nm
Output torque at 5 / 10 / 30 rpm: 235 / 190 / 135 Nm
Backlash maximum: 1 arcmin
Mass: 4.9 kg

Design & options

Precision cycloidal reduction
Published speed-dependent torque table
Separate shaft and housing rotation arrangements

Applications to discuss

Robot rotary axes
Precision automation

Model configuration table

6 source-backed configurations. Torque is in Nm, input speed in rpm and backlash in arcmin. The note preserves the rating conditions and precision grade.

Model	Ratio	Rated torque Nm	Backlash arcmin	Rated input rpm	Mounting	Rating conditions	Source
CORT-20E	57	170	1	Not stated	Not stated	Rated at 15 rpm output; shaft rotation ratio	Original ↗
CORT-20E	81	170	1	Not stated	Not stated	Rated at 15 rpm output; shaft rotation ratio	Original ↗
CORT-20E	105	170	1	Not stated	Not stated	Rated at 15 rpm output; shaft rotation ratio	Original ↗
CORT-20E	121	170	1	Not stated	Not stated	Rated at 15 rpm output; shaft rotation ratio	Original ↗
CORT-20E	141	170	1	Not stated	Not stated	Rated at 15 rpm output; shaft rotation ratio	Original ↗
CORT-20E	161	170	1	Not stated	Not stated	Rated at 15 rpm output; shaft rotation ratio	Original ↗

Before you specify this gearbox

General-purpose cycloidal reducers and precision RV reducers serve different requirements. Confirm the series, torsional stiffness and allowable moment loads.

Confirm continuous, peak and emergency-stop load limits separately.
Match the motor flange, shaft, mounting orientation and lubrication requirements.
Request the current drawing revision and selection calculation from the manufacturer.

Source & attribution

https://www.cnhtr.com/Art/Art_31/Art_31_142.aspx
Checked 2026-09-22. Image and catalog data: Hengfengtai.

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