EZM, EZS synchronous servo motors
Compact STOBER synchronous servo motors for direct drive of a threaded nut with flange or for direct drive of a rotating threaded spindle.

State-of-the-art servo technology for screw drives.

The super-compact synchronous servo motors for screw drives are designed for universal attachment to threaded spindles.

The EZS series has a clamping unit for fastening the threaded spindle. The EZM synchronous servo motor is ideal for directly driving a threaded nut.

BENEFITS
Precise direct drives: For individual solutions

To serve a wide range of applications, the EZS and EZM synchronous servo motors are available in two sizes, each with three power output stages. Both versions can be optionally equipped with a brake.

Cooling by means of a forced ventilation unit is available as an option.

Highly efficient motor technology

Both the EZS and the EZM series feature an exceptionally high volume performance. It’s based on the industrial implementation of orthocyclic linear tooth winding technology.

This high-quality technology makes it possible to produce a rod winding with the highest possible copper fill factor. This increases the motor rating by approx. 80%!

EZS: For rotating threaded spindles

The EZS synchronous servo motors were specially developed for driving rotating threaded spindles.

The motor shaft is designed as a blind hollow shaft. As an option, the threaded spindle and motor shaft can be connected via a clamping unit. It can be equipped with a permanent magnet holding brake without any problems.

EZM: For threaded nuts with flange

Due to the generous dimensions of the hollow flanged shafts, EZM synchronous servo motors are ideal for directly driving flanged threaded nuts.The flanged design meets the requirements of DIN 69051-5.

TECHNICAL DATA
EZS SERIES
Power density
Price category
  • Nominal torque – motor: 3.85 – 23.7 Nm
  • Stall torque – gear unit output: 4.3 – 27.7 Nm

Find your right fit!
EZM SERIES
Power density
Price category
  • Nominal torque – motor: 3.65 – 14.7 Nm
  • Stall torque – gear unit output: 4.25 – 18.9 Nm

Find your right fit!
FEATURES
EZS SERIES
  • Bearing: Axial angular contact ball bearing acting on two sides for direct absorption of the threaded spindle forces
  • Brake: Optional permanent magnet holding brake on the motor’s B side
  • Power interface: Twist-on plug connectors with quick lock; optional mating connectors
  • Encoder interfaces:
    • EnDat® 3
    • EnDat® 2.1/2.2 single-turn, multi-turn
    • One Cable Solution (OCS)
    • Resolver
  • Winding protection: PTC thermistors guarantee thermal winding protection
  • Paint: RAL 9005 Jet black
  • Marks and test symbols: CE and cURus

EZM SERIES
  • Threaded nut:
    • Designed in acc. with DIN 69051 for the drive of ball-threaded nuts of ball screws
    • Maximum diameter of the threaded spindle: 25 – 32 mm (EZM5 – EZM7)
  • Ball screws:
    • Ball screws from manufacturers HWIN, Steinmeyer, THK, Kammerer, NSK, NEFF can be mounted as standard; mounting of alternative ball screws on request
    • The ball screw is not included in the scope of delivery!
  • Bearing: Axial angular contact ball bearing acting on two sides for direct absorption of the threaded spindle forces
  • Brake: Optional permanent magnet holding brake on the motor’s B side
  • Power interface: Twist-on plug connectors with quick lock; optional mating connectors
  • Encoder interfaces: EnDat® 2.1 single-turn, EnDat® 2.2 single-turn, multi-turn
  • Winding protection: PTC thermistors guarantee thermal winding protection
  • Paint: RAL 9005 Jet black
  • Marks and test symbols: CE and cURus

 
APPLICATIONS
Welding robots
Industries and Applications

We get your visions moving – in various industries and markets worldwide.

Using a holistic approach for your specific task, we support you with precisely tailored solutions for drives and automation.

Learn more
DOCUMENTS
TitleVersionIDDateLanguageSize / Type
Catalog Drives and Automation 03004427112021 03EN6.62 MB [PDF]
Catalog STOBER compact 034426552021 06EN8.33 MB [PDF]
Catalog Synchronous servo geared motors EZ 4424372021 04EN20.64 MB [PDF]
TitleVersionIDDateLanguageSize / Type
Operating instructions EZ EZHD EZHP EZS EZM synchronous servo motors 014430322019 05EN434.19 KB [PDF]
TitleVersionIDDateLanguageSize / Type
Connection plan EZ_AA on SDS 5000 044423052019 02EN167.17 KB [PDF]
Connection plan EZ_AB on MDS 5000 044423062019 02EN167.61 KB [PDF]
Connection plan EZ_FA on SDS 4000 compatible 044423082019 02EN137.91 KB [PDF]
Connection plan EZ_FG on B&R ACOPOS 044423132019 02EN151.80 KB [PDF]
Connection plan EZ on Beckhoff AX5000 034423182020 02EN191.18 KB [PDF]
Connection plan EZ_FP on MDS _ SDS 5000 compatible 044423212019 02EN148.52 KB [PDF]
Connection plan EZ_FV on B&R ACOPOSMulti 024424442019 02EN152.08 KB [PDF]
Connection plan EZ_AE on SD6 024424512019 02EN160.21 KB [PDF]
Connection plan EZ_AF on MDS 5007 024426652019 02EN153.32 KB [PDF]
Connection plan EZ_AH on MDS 5007 014426662017 07EN56.14 KB [PDF]
Connection plan EZ_AJ on SDS 5007 024426682019 02EN153.37 KB [PDF]
Connection plan EZ_AL on SD6A02 014426722017 07EN61.94 KB [PDF]
Connection plan EZ_AM on SD6A02 024426742019 02EN146.34 KB [PDF]
Connection plan EZ_GG on B&R Acopos EnDat 2.2 Standard 024426772018 06EN122.02 KB [PDF]
Connection plan EZ_GP on B&R P3 EnDat 2.2 Standard 014430222018 06115.08 KB [PDF]
Connection plan EZ_GY on B&R Acopos P3 EnDat 2.2 004430952019 09EN177.30 KB [PDF]
Connection plan EZ on Siemens SINAMICS S120 04442315EN184.34 KB [PDF]
TitleVersionIDDateLanguageSize / Type
TitleVersionIDDateLanguageSize / Type
EU Declaration of conformity Synchronous servo motors EZF EZH EZHD EZHP EZS EZM 014430892018 06EN28.49 KB [PDF]
EU Declaration of conformity Synchronous servo motors EZF EZH EZHD EZHP EZS EZM 014430902018 06EN28.03 KB [PDF]
Certificate UL _ cURus synchronous servo motors EZ EZS EZM EZHD EZHP 004430972018 04EN1.43 MB [PDF]
Certificate Free of CCC 442072EN348.51 KB [PDF]
SERVICES
Consulting & support
Technology Consulting

Take advantage of the expertise of our application engineers in the Sales Centers or contact our first level support.

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Tools & software
SERVOsoft®

With SERVOsoft®, you have a tool at your fingertips that lets you design your drive systems with precise scaling in just a few steps. Electrical as well as mechanical design, and simple and fast at the same time.

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STOBER Configurator

With the intuitive STOBER product configurator, you can filter, compare, save and share the right drive solutions with ease.

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STOBER CAD

Are you looking for CAD data? With the STOBER CAD tool, the drawings you need are ready for download in just a few clicks.

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Service, replacement & repair
Service Network

STOBER is present in over 40 countries worldwide with 10 subsidiaries and 80 service partners. No matter where, no matter when, we’re always at your service and on the move!

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Replacement & Repair

Do you need competent help with replacement parts, replacement drives, repairs and retrofitting? Feel free to contact us! We also offer a 24-hour hotline for urgent cases.

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Made in Germany. Since 1934.

Dedicated and Solution-Oriented.

We support you in turning your visions and projects into reality.

In the process, we rely on our decades of experience and an exceptionally broad range of products. Take advantage of the expertise of our application engineers!

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