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PS/NS planetary gear reducer series

Manufacturer catalogue image · Series illustration

Motor parts & accessories

PS/NS planetary gear reducer series

SYN-TRON logoSYN-TRONView manufacturer →
Product Type
Planetary gearbox
Motor Compatibility
Servo / stepper; adapter dependent
Selection
Specify ratio, backlash and output loads
Catalogue Type
Product series

Catalogue series · Exact configuration and availability confirmed by the manufacturer.

PS or NS: specify reversal accuracy and the loaded output shaft

The PS/NS catalogue separates no-load backlash from torsional stiffness and shaft-bearing capacity. Choosing the lower-backlash NS version does not remove elastic twist or approve a pulley load. Size 60 provides a useful comparison because both PS60 and NS60 have explicit performance entries; the larger-size columns shown in this catalogue are PS90, PS115 and PS142.

What changes when a size-60 order changes from PS to NS?

Values below are for the selected stage count. Backlash is the catalogue’s no-load figure, in arcminutes; the motor, coupling and machine also contribute to positioning error.

Size-60 propertyPS60NS60
Single-stage backlash 6 arcmin 5 arcmin
Two-stage backlash 10 arcmin 9 arcmin
Single-stage 5:1 rated output torque 45 N·m 45 N·m
Single-stage 10:1 rated output torque 40 N·m 40 N·m
Torsional stiffness in these ratio rows 1.3 N·m/arcmin 1.3 N·m/arcmin
Rated / maximum input speed 3000 / 5000 r/min 3000 / 5000 r/min

A shaft load that fits at 30 r/min may not fit at 1000 r/min

The bearing data are speed-dependent. A single maximum axial-force number would conceal the part of this catalogue that matters most for a loaded output shaft.

Size 60: keep axial load with its speed

The axial-load table lists 3192 N at 30 r/min, 2135 N at 100 r/min, 1482 N at 300 r/min and 992 N at 1000 r/min. Do not apply the 3192 N entry across the speed range. State the actual shaft speed and loading cycle when selecting a reducer for a screw or other thrust-producing mechanism.

A belt or gear also needs an overhung-distance check

The radial-load charts use distance X from the output-side reference shown in the drawing to the applied load. Allowable radial load falls as X increases and as shaft speed rises. Supply the pulley or gear position and force direction, not just a belt-tension total; ask for a combined-load check if axial thrust is also present. The chart does not establish that separate maximum axial and radial loads may be applied together.

Lower backlash is not zero deflection under torque

PS60 and NS60 share the listed 1.3 N·m/arcmin torsional stiffness. Changing to NS addresses the no-load reversal-clearance figure, while loaded angular deflection remains a separate selection issue. For a reversing positioning axis, provide working torque, acceleration, reversals and the acceptable error at the driven mechanism rather than specifying only a backlash class.

Turn the designation into an approved assembly drawing

The catalogue decodes NS-60-010-05 as NS, size 60, ratio 10:1 and a 5-arcminute backlash designation. It is a useful starting point for an offer, but it does not identify the motor adapter or validate the complete duty.

Fix the ratio and stage count before comparing torque

For size 60, the single-stage 3:1, 4:1 and 5:1 rows are rated 45 N·m, while 7:1 and 10:1 are rated 40 N·m. Two-stage 70:1 and 100:1 are also 40 N·m. A higher ratio therefore does not automatically increase the gearbox’s rated capacity. Keep the offered ratio, stage count, efficiency and torque row together.

Check the physical connection on both sides

The size-60 outline gives a 16 mm output shaft, 50 mm locating register, 70 mm mounting-hole pitch circle and four 5 mm holes. Body length L is 53 mm for one stage or 70.5 mm for two stages, excluding the flange. The motor-side requirements include a shaft diameter no greater than 14 mm and a shaft length including register height of 31 mm. Submit the actual motor drawing and ask for the adapter and total assembly length; these catalogue limits alone do not prove a drop-in fit.

Approve the exact revision and operating speed

The currently linked manual is dated May 2016. Ask the quotation to confirm the current dimensions and ratings for the full designation. Its speed table also groups PS115 and PS142 at 2000 r/min rated and 3000 r/min maximum input, unlike the smaller sizes’ 3000 and 5000 r/min values. Do not transfer the size-60 speed limits to a larger frame.

CATALOGUE OVERVIEW

About this component series

PS and NS precision planetary reducers are designed to couple with servo or stepper motors. The manufacturer lists multiple frame sizes and reduction ratios; NS is offered as a lower-backlash series.

This is a mechanical transmission component, not a complete electric motor. Match the input flange and shaft to the selected motor, then check output torque, radial and axial loads, backlash and duty cycle at the required ratio. Include a mounting drawing and motion profile when requesting a configuration.

Model / series reference: PS/NS

Published specifications

Specifications describe a series range; confirm which ratings apply together to the quoted model.

Product Type
Planetary gearbox
Motor Compatibility
Servo / stepper; adapter dependent
Selection
Specify ratio, backlash and output loads
Catalogue Type
Product series

Confirm mounting and shaft dimensions against the drawing for the quoted configuration.

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