PMHG-I 20 Strain-Wave Reducer

MANUFACTURER DOCUMENTATION

Overview

PMHG-I 20 is documented here using the manufacturer’s frame-20 rating table. Rated torque is 33 Nm at ratio 50, 44 Nm at ratio 80 and 52 Nm at ratios 100, 120 and 160, all at 2,000 rpm input. The source separates these ratings from start-stop, average-load and momentary limits. Hollow assembled unit with supporting bearing describes the integration format; it does not make this unit interchangeable with another strain-wave assembly of the same ratio. Check the flange drawing, bearing loads, input connection and operating cycle before specifying a joint. Backlash values are converted from the original arcsecond figures only in the configuration table.

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Published series specifications

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

Documented frame

20

Ratios

50 / 80 / 100 / 120 / 160

Rated torque at 2,000 rpm

33 / 44 / 52 / 52 / 52 Nm, respectively

Maximum input speed

6,500 rpm

Permissible average input speed

3,500 rpm

Backlash

≤20 arcsec at ratios 50/80; ≤10 arcsec at 100/120/160

Transmission error

≤60 arcsec

Mass

1.38 kg

Construction

Hollow assembled unit with supporting bearing

Model configuration table

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

Before you specify this gearbox

Specify rated torque, repeated peak torque, momentary peak torque, duty and lifetime. Backlash, lost motion and transmission accuracy are distinct characteristics.

• 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.

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A compact hollow strain-wave series for precision motion. The manufacturer publishes separate continuous, start/stop and momentary torque ratings; these limits should not be interchanged.

Frame sizes

14 / 17 / 20 / 25

Ratios

50 / 100

Rated torque

3.5–47 Nm at 2,000 rpm input

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Laifual

FSS20 Cup-Type Harmonic Reducer

FSS20 strain-wave reducer from the Laifual standard cup-type range. Rated torque is specified at 2,000 rpm input. Start-stop, average-load and momentary torque limits are separate values and must not replace the rated torque.

Frame

20

Ratios

50 / 80 / 100 / 120 / 160

Rated torque at 2,000 rpm

25 / 34 / 40 / 40 / 40 Nm, respectively

View specifications →