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AKM2G Servo Motor

AKM2G represents the latest evolution of the industry-leading AKM motor family

With significant torque increases in the same motor size OEMs can achieve substantial performance improvement without changing the motor mounting or using more machine space.

Designers needing to reduce machine size benefit from AKM2G’s ability to deliver increased power and torque density in a smaller footprint.

  • Extensive selection of feedback options to match application and performance requirements including options that support functional safety
  • Shaft, mounting, and connector options
  • Holding brake and thermal sensor options
  • Available low voltage models bring the benefits of AKM2G to portable, mobile and battery powered applications where higher efficiency translates to a smaller motor with lower energy demand
Product available worldwide

Deliver Higher Machine Performance

Higher power and torque density, lower inertia rotor design and Ready for Co-Engineering capability enable you to design your highest performing machine.

Performance Overview

Achieve Your Desired Perfomance in Less Space

The AKM2G drops right into existing machine designs to increase performance, when compared to competing motors, without increasing the size of the motor.

See specs 2D/3D Models

Increase Feedback Performance

Available standard with choice of single cable Kollmorgen Smart Feedback device, HIPERFACE DSL or EnDat 2.2 digital encoders. Dual cable resolver feedback also available standard along with user-specified feedback devices available through co-engineering. Available options support functional safety applications. For low voltage motors a standard commutating encoder option is available.

Standard Voltage Feedback Options Low Voltage Feedback Options

Reduce Cabling

Single hybrid combined power and feedback cables for Kollmorgen Smart Feedback device, HIPERFACE DSL or EnDat 2.2 digital encoders. Dual independent power and resolver feedback cables are also available standard along with other optional configurations. Kollmorgen 2G cables provide the correct design for use in Kollmorgen 2G Systems that incorporate functional safety rated feedback devices.

2G Cables Selection Guide


  • Standard winding choices for 120 Vac to 480 Vac operation, and low voltage winding choices for 24 to 96 volts (Vdc or Vac) with various speed/torque performance curves
  • Feedback options to match application requirements and drive selection
    • Kollmorgen SFD3
    • HIPERFACE DSL (supports functional safety applications)
    • EnDat 2.2 (supports functional safety applications)
    • Resolver
    • Commutating Encoder is available as a standard option for low voltage motors
    • Customer-specified feedback devices available through co-engineering
  • Connector options (as appropriate for feedback type and motor size)
    • SpeedTec (standard for single or dual cable designs)
    • ytec (dual connector with single insertion at motor for size 2 motors)
  • System cable options for use with Kollmorgen AKD2G servo drives and other AKD family servo drives
    • Single cable SFD3/HIPERFACE DSL/EnDat 2.2
    • Two-cable variant for resolver including ytec connector motors and commutating encoder
  • Standard IP54 rating, IP65 with optional shaft seal. Other optional ratings available through co-engineering
  • International standard mount with choice of smooth shaft or closed keyway
    • Other mount and shaft options available through co-engineering
  • 24VDC mechanical holding brake option 
  • Thermal sensor options for maximum motor protection and servo drive compatibility
  • Low friction shaft seal options for both wet and dry running applications 


AKM2G Performance Data (by frame size)

AKM2G-2x AKM2G-3x AKM2G-4x
Parameter Sym Unit 1 2 3 4 1 2 3 1 2 3 4
Continuous Torque at Stall Tc Nm 0.65 1.12 1.51 1.85 1.70 2.90 3.86 2.87 5.12 6.98 8.51
Rated Speed Nrtd rpm 8000 8000 8000 8000 8000 7600 8000 6000 6000 6000 5400
Rotor Inertia Jn kg-cm2 0.0930 0.1549 0.2169 0.2789 0.4264 0.8130 1.200 0.774 1.36 1.95 2.53


AKM2G-5x AKM2G-6x AKM2G-7x
Parameter Sym Unit 1 2 3 4 2 3 4 5 1 2 3 4
Continuous Torque at Stall Tc Nm 6.83 12.0 16.2 20.1 15.3 21.5 27.0 32.7 23.0 41.1 57.8 72.1
Rated Speed Nrtd rpm 6000 5600 5100 4800 5000 4500 4200 3800 4900 3400 3200 3000
Rotor Inertia Jn kg-cm2 2.52 4.58 6.64 8.70 9.10 13.0 16.9 20.8 25.9 46.8 67.7 88.6
Values shown are representative of each model. For exact information, refer to the Selection Guide, Installation manual, or Motioneering and/or our curve generator tools.

Standard Voltage Selection Guide Low Voltage Selection Guide Design Tools


AKM2G Dimensional Overview

AKM2G Series Flange IEC Length by Stacks A Ø B C Ø D Ø E F Ø G
1 2 3 4 5
AKM2G2x 58 111 130 149 168 - 23.0 11.0 2.50 63.0 5.5 M4
DIN 332
AKM2G3x 72 121 153 184 - - 30.0 14.0 2.50 75.0 5.5 M5
DIN 332
AKM2G4x 88 125 151 177 203 - 40.0 19.0 3.00 100.0 6.6 M6
DIN 332
AKM2G5x 114 143 172 202 231 - 50.0 24.0 3.00 130.0 9.0 M8
DIN 332
AKM2G6x 142 - 168 190 212 234 58.0 32.0 3.50 165.0 10.19 M12
DIN 332
AKM2G7x 192 169 203 237 271 - 80.0 38.0 4.00 215.0 13.4 M12
DIN 332
All values in millimeters. Nominal dimensions shown for resolver and Smart Feedback SFD3 motors of less than 20 amps continuous. See individual motor schematics for tolerances and complete dimensions including other feedbacks and motors rated greater than 20 amps continuous.

2D/3D Models Standard Voltage Selection Guide Low Voltage Selection Guide

Servo Motor Product Selector

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Design Your Motion Solution

Consult an Expert

Count on Kollmorgen support to help you design and build a successful machine and keep it reliably productive, anywhere in the world. Our co-engineering experts will work with you to tailor a perfect-fit solution for your motion requirements.

Talk to a motion expert

For more than 100 years, Kollmorgen has been creating innovative solutions that bring big ideas to reality, keep the world safer and improve lives. Our history of reliability is unsurpassed, and our solutions are supported through engineering centers of excellence and customer service in all major regions of the world.

See the Kollmorgen global footprint   |   Discover the Kollmorgen difference
Title Language(s) Date Size
pdfAKM2G Installation Manual EN DE IT ES FR RU (REV E) English, French, German, Italian, Russian, Spanish 31 Aug 2020 9.07 MB Copy URL
pdfAKM2G Part Number Scheme English 09 Dec 2021 111.46 KB Copy URL
pdfAKM2G Performance Curves English 27 Jun 2019 8.45 MB Copy URL
pdf科尔摩根AKM2G电机安装手册_EN_2020 Chinese, Simplified 07 Sep 2021 9.07 MB Copy URL
pdf科尔摩根AKM2G电机选型手册_2019__RevE Chinese, Simplified 07 Sep 2021 8.74 MB Copy URL
Title Language(s) Date Size
Kollmorgen 2G Cable Guide English 14 Mar 2019 Copy URL
Title Language(s) Date Size
2G Motion System Brochure English 29 Jan 2020 1.58 MB Copy URL
Title Language(s) Date Size
AKM2G Low Voltage Selection Guide English 01 Feb 2022 7.19 MB Copy URL
AKM2G Servo Motor Selection Guide English 30 Mar 2019 9.06 MB Copy URL
Kollmorgen 2G Cable Guide English 14 Mar 2019 21.67 MB Copy URL
Kollmorgen Automation and Motion Control English 14 Jun 2021 15.53 MB Copy URL

These 3D models are intended to guide your design activities and may be used as reference information. Be sure to consult a Kollmorgen expert to ensure you have the most current and accurate information for critical aspects of design work

Title Language(s) Date Size
AKM2G 3D Models & 2D Dimensions English 31 Jul 2018 Copy URL
Resolving Servo Feedback Choices This PowerPoint presentation explains the differences between different types of servo motor feedback devices, including: The differences between absolute and incremental devices. The...
AKD2G Standard Voltage and Low Voltage Winding Thermal Sensor Options Standard Option 0 is a PT1000 linear device with an avalanche PTC in series.  So you get some linear ohms vs temperature curve until the motor temperature approaches 155C, then the resistance...
Ingress Protection of Servo Motors [toc] Sealing is an important design tool used to prolong the life of motors against harsh environments containing dust or liquid contaminants. There are arguably an unlimited number of...
Setup of EtherCAT master to run an AKD2G in “DS402: Cyclic Synchronous Position Mode” AKD2G Firmware AKD2G_01-90-13-000 Objective: We, Kollmorgen, supply an AKD2G XML files to be used with the EtherCAT CoE Master.  It has one default configuration, “cyclic Synchronous...
DESINA Farbkodierung DESINA steht für DE zentralisierte und S tandardisierte IN st A llationstechnik für Werkzeugmaschinen und Produktionssysteme.DESINA beschreibt die...


Title Language(s) Date Size
pdfAKM2G EU Declaration of Conformity English 20 Jun 2020 227.31 KB Copy URL
pdfAKM2G EU RoHS Declaration (RoHS10W) English 13 Jan 2022 212.4 KB Copy URL
pdfAKM2G Product Notice on Functional Safety English 12 Oct 2021 335.9 KB Copy URL
pdfAKM2G REACH SVHC Certificate of Compliance English 01 Feb 2022 279.33 KB Copy URL
pdfAKM2G UL Certificate of Compliance English 18 Dec 2019 354.8 KB Copy URL
pdfCEL China Efficiency Labelling for Servo and Stepper Motors English 17 Dec 2021 139.72 KB Copy URL
pdfEAC Certification for Motors English, Russian 09 Dec 2020 98.97 KB Copy URL
pdfKollmorgen CE Technical Notice - Servo and Stepper Motors Efficiency English 26 Aug 2020 389.92 KB Copy URL
pdf科尔摩根AKM2G电机CE认证 Chinese, Simplified 07 Sep 2021 227.31 KB Copy URL
pdf科尔摩根AKM2G电机EAC认证 Chinese, Simplified 07 Sep 2021 98.97 KB Copy URL
pdf科尔摩根AKM2G电机UL认证 Chinese, Simplified 07 Sep 2021 354.8 KB Copy URL