Inline Servo Gearboxes – Helical Solutions

inline servo640

Inline Gearboxes: Helical & Planetary

STOBER inline servo gearboxes are unrivaled in their precision and options. Choose from planetary gearing or take advantage of helical gearing. Servo doesn’t have to mean planetary! These inline helical gearboxes and inline planetary gearboxes can be mounted to any motor with our toleranced motor adapters, or you can add a STOBER motor to them to make a geared motor. These industrial gearboxes are assembled in our Maysville, Kentucky facility, shipped in one day, and come with a five-year warranty.

Whether you need high-precision planetary inline gearboxes for demanding servo applications or quiet, efficient helical inline gearboxes for general automation, STOBER offers flexible, modular solutions engineered for durability and easy integration. Our inline servo gearboxes support a wide range of torque requirements, gear ratios, and mounting options to fit diverse industrial automation needs, from robotics and packaging to material handling and machine tools. With advanced engineering, low backlash, and robust motor adapters, STOBER gearboxes deliver smooth power transmission and consistent performance in even the most challenging environments.

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The P series of custom inline gearbox solutions features planetary gearing, providing unsurpassed smoothness and precision.

It is incredibly efficient, has low backlash, and runs quiet.

Plus, you can choose from several bearing options to handle radial or axial loads, optimizing your machine design.

P planetary gearboxes are available as compact planetary servo geared motors or they can be mounted to any motor with our toleranced motor adapter.

Planetary gearbox

P Series: TECHNICAL DATA

Power Density:
Price Range:
 $ $ $ $ $
  • Total gear ratio range: 3 – 100
  • Acceleration torque: 11 – 3,450 Nm
  • Nominal torque: 16 – 2,483 Nm
  • Continuous Input Speed: Up to 6,000 RPM
  • Cyclic Input Speed: Up to 8,000 RPM
  • Torsional Stiffness: Up to 407 Nm/arcmin

Find your right fit!

Planetary series

P Series: FEATURES

  • Output Shaft:
    • Plain shaft
    • Feather key
  • Bearings: Options for axial or radial loads
    • Standard – ball bearing ideal for some axial and radial load capacity
    • Double row angular contact bearing – ideal for high axial loads
    • Cylindrical roller bearing – ideal for radial loads
  • Backlash:
    • Standard
    • Reduced - optimized gear hardening ensures smoothness of motion and minimizes velocity ripple
  • Package Options: options for different environments. A package includes coating, lubrication, and output material
    • Standard Duty - RAL-9005 black paint, Synthetic Exxon Mobil SHC 629, carbon steel output
    • Food Duty - 316 stainless steel epoxy paint with anti-microbial clear coat, Exxon Mobil SHC CIBUS 220, and stainless steel output
  • Motor Adapter:
    • ME – standard clamp coupling
      • Seal option - MSS1 seal for longer life
    • MEL - clamp coupling that can accommodate larger diameter motor shaft without upsizing to larger gearbox
    • MB – ServoStop with integrated safety brake
  • Environmental Considerations: ATEX Certified Available for explosive environments
  • Available as a geared motor!
  • Available as a rack and pinion system

Find your right fit!

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P-EZ Geared Motor by STOBER Drives Click play to begin and ? icon for controls and navigation assistance

P Series: PART NUMBER EXAMPLE:

P series part number

P 4 3 1
S G S S
0030
ME
L
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The C series utilizes helical gears for up to 97% efficiency.

Choose the housing style that fits your application – round or square flanges, tapped holes, or foot mounting.

C helical gearboxes are available as compact inline servo geared motors or they can be mounted to any motor with our toleranced motor adapter.

inline servo

C Series: TECHNICAL DATA

Power Density:
Price Range:
 $ $ $ $ $
  • Total gear ratio range: 2 – 276
  • Acceleration torque: 36 – 8,000 Nm
  • Nominal torque: 35 – 7,000 Nm
  • Continuous Input Speed: Up to 4,000 RPM
  • Cyclic Input Speed: Up to 7,000 RPM
  • Torsional Stiffness: Up to 393 Nm/arcmin

Find your right fit!

inline servo

C Series: FEATURES

  • Housing Styles:
    • Round output flange
    • Pitch circle diameter tapped holes
    • Foot mounting
    • Square output flange
  • Package Options: options for different environments. A package includes coating, lubrication, and output material
    • Standard Duty - RAL-9005 black paint, Synthetic Exxon Mobil SHC 629, carbon steel output
    • Corrosion Resistant Duty - 316 stainless steel epoxy paint, Exxon Mobil SHC 630 or 600XP220 Mineral, and stainless steel output
    • Food Duty - 316 stainless steel epoxy food duty paint with anti-microbial clear coat, Exxon Mobil SHC CIBUS 220, and stainless steel output
  • Motor Adapter:
    • ME – standard clamp coupling
      • Seal option - MSS1 seal for longer life
    • MB – ServoStop with integrated safety brake
  • Environmental Considerations: ATEX Certified Available for explosive environments
  • Mounting Positions:
    • EL1, 2, 3, 4, 5, or 6
  • Available as a geared motor!

Find your right fit!

K features

C Series with MB Brake by STOBER Drives Click play to begin and ? icon for controls and navigation assistance

C Series: PART NUMBER EXAMPLE:

C series part number

C 0 0 2
F
0020
ME10
B
EL1
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The PH series inline gear systems offers superior stiffness and accuracy.

These inline planetary gearboxes offers a reinforced bearing option for applications with higher axial loads.

PH gearboxes are available as compact planetary servo geared motors or they can be mounted to any motor with our toleranced motor adapter.

Planetary gearbox

PH Series: TECHNICAL DATA

Power Density:
Price Range:
 $ $ $ $ $
  • Total gear ratio range: 4 – 121
  • Acceleration torque: 60 – 7,500 Nm
  • Nominal torque: 36 – 5,000 Nm
  • Continuous Input Speed: Up to 6,000 RPM
  • Cyclic Input Speed: Up to 8,000 RPM
  • Torsional Stiffness: Up to 1,743 Nm/arcmin

Find your right fit!

Planetary series

PH Series: FEATURES

  • Bearings: Options for axial or radial loads
    • Standard – ball bearing ideal for some axial and radial load capacity
    • Reinforced bearing – ideal for high axial loads
  • Backlash:
    • Standard
    • Reduced - optimized gear hardening ensures smoothness of motion and minimizes velocity ripple
  • Coating Options: options for different environments.
    • Standard - RAL-9005 black paint
    • Washdown - 316 stainless steel epoxy paint
  • Motor Adapter:
    • ME – standard clamp coupling
      • Seal option - MSS1 seal for longer life
    • MB – ServoStop with integrated safety brake
  • Environmental Considerations: ATEX Certified Available for explosive environments
  • Available as a geared motor!
  • Available as a rack and pinion system

Find your right fit!

K features

PH-EZ Geared Motor by STOBER Drives Click play to begin and ? icon for controls and navigation assistance

PH Series: PART NUMBER EXAMPLE:

PH series part number

PH 3 3 1
S F S S
0040
ME
L
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The PE series is an attractive option for applications that don’t require the highest precision or smoothness.

It's unique for an economy option because it utilizes helical gearing.

PE gearboxes are available as compact planetary servo geared motors or they can be mounted to any motor with our toleranced motor adapter.

Economic Planetary

PE Series: TECHNICAL DATA

Power Density:
Price Range:
 $ $ $ $ $
  • Total gear ratio range: 3 – 100
  • Acceleration torque: 13 – 310 Nm
  • Nominal torque: 7 – 160 Nm
  • Continuous Input Speed: Up to 4,000 RPM
  • Cyclic Input Speed: Up to 8,000 RPM
  • Torsional Stiffness: Up to 35 Nm/arcmin

Find your right fit!

Economic Planetary

PE Series: FEATURES

  • Coating Options: options for different environments.
    • Standard - RAL-9005 black paint
    • Washdown - 316 stainless steel epoxy paint
  • Motor Adapter:
    • ME – standard clamp coupling
    • MEL - clamp coupling that can accommodate larger diameter motor shaft without upsizing to larger gearbox
  • Available as a geared motor!
  • Available as a rack and pinion system

Find your right fit!

K features

PE Series: PART NUMBER EXAMPLE:

PE series part number

PE 3 2 1
S P S S
S 0030
ME
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The PHQ series features four planetary gears, making it the most powerful gearbox on the market.

It provides smooth operation while producing huge amounts of torque.

PHQ gearboxes are available as compact planetary servo geared motors or they can be mounted to any motor with our toleranced motor adapter.

Planetary gearbox series

PHQ Series: TECHNICAL DATA

Power Density:
Price Range:
 $ $ $ $ $
  • Total gear ratio range: 5.5 – 600
  • Acceleration torque: 200 – 43,000 Nm
  • Nominal torque: 100 – 25,000 Nm
  • Continuous Input Speed: Up to 4,500 RPM
  • Cyclic Input Speed: Up to 8,000 RPM
  • Torsional Stiffness: Up to 6,269Nm/arcmin

Find your right fit!

Planetary gearbox series

PHQ Series: FEATURES

  • Bearings: Options for axial or radial loads
    • Standard – ball bearing ideal for some axial and radial load capacity
    • Reinforced bearing – ideal for high axial loads
  • Backlash:
    • Standard
    • Reduced - optimized gear hardening ensures smoothness of motion and minimizes velocity ripple
  • Coating Options: options for different environments.
    • Standard - RAL-9005 black paint
    • Washdown - 316 stainless steel epoxy paint
  • Motor Adapter:
    • ME – standard clamp coupling
      • Seal option - MSS1 seal for longer life
    • MB – ServoStop with integrated safety brake
  • Environmental Considerations: ATEX Certified Available for explosive environments
  • Available as a geared motor!
  • Available as a rack and pinion system

Find your right fit!

K features

PHQ Series: PART NUMBER EXAMPLE:

PHQ series part number

PHQ 4 3 1
S F S S
0055
ME
L

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STOBER’s Power Tips video series shares best practices and helpful answers to frequently asked questions. 

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Why Choose STOBER?

Everything we do is built upon the three pillars of quality, delivery and service. This means you can expect superior components made in the U.S.A. to the highest standards of performance and durability. As the world’s toughest gearbox manufacturer, our inline geared motors, inline gear reducers and more are built to last even under the harshest conditions.
 
As a third-generation family-owned company, we will stand by your side with a dedicated support team to assist you whenever you need it. Reach out to us today to learn more about what we have to offer.

FIND YOUR REP!

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K series part number