Kollmorgen AKM51G-CNC2R-00 Servo Motor

1. Model Code Definition

Main Model: AKM51G

• AKM: Kollmorgen high-performance permanent magnet synchronous servo motor series

• 5: Frame size 5, 108×108mm IEC standard square flange

• 1: Stack length 1, standard stator stack

• G: High-voltage winding, optimized for 560-640V DC bus (400/480V AC input), high-speed rated

Configuration Code: CNC2R

• C: Mounting – 108×108mm IEC square flange (C tolerance)

• N: Shaft – Smooth (plain) shaft (no keyway), φ25mm diameter with M14 threaded end

• C: Feedback – 16-bit hollow shaft resolver (electromagnetic rotary transformer)

• 2: Connector – Dual M23 rotatable right-angle connectors (Speed Tec Ready)

• R: Special options – IP65 protection, standard factory configuration

Suffix -00

• Standard factory version

• IP65 full protection (housing & shaft)

• Class F (155°C) insulation

• Lifetime lubricated industrial bearings

2. Electrical Specifications

• Continuous stall torque: 4.75 N·m

• Rated torque: 1.94 N·m

• Peak torque: 14.2 N·m

• Rated power: 1.22 kW

• Rated speed: 6000 rpm (at 560-640V DC bus)

• Max speed: 6000 rpm

• DC bus voltage: 560-640V DC

• Winding: 3-phase, high-voltage G winding

• Pole pairs: 10 poles (5 pairs)

• Rotor inertia: 0.000342 kg·m² (3.4 kg·cm²)

• Weight: Approx. 4.2 kg

• Insulation class: Class F (155°C)

• Thermal sensor: Built-in PTC thermistor

3. Feedback System (Resolver)

• Type: 16-bit hollow shaft resolver

• Structure: Pure electromagnetic, no optical components

• Environmental resistance: High tolerance to vibration, dust, oil, high temperature

• Operating temperature: -40°C ~ +125°C

• Features: Maintenance-free, high reliability, requires homing after power-on

4. Mechanical Specifications

• Mounting flange: 108×108mm IEC B5 (C tolerance)

• Output shaft: Smooth shaft, φ25mm diameter

• Shaft end: M14 threaded hole for locking collar

• Connectors: 2× M23 rotatable right-angle (Speed Tec Ready)

• Protection class: IP65 (housing & shaft)

• Housing: Matte black enamel, excellent heat dissipation

• Bearings: Pre-lubricated, maintenance-free (20,000-hour service life)

5. Environmental & Certifications

• Operating temperature: -20°C ~ +40°C

• Storage temperature: -30°C ~ +85°C

• Humidity: 5%–95% RH, non-condensing

• Vibration/shock: Industrial grade reinforced design

• Certifications: CE, UL, cULus, RoHS

6. Core Features

1. High-speed G winding: Optimized for 6000 rpm at 480V AC, high efficiency

2. Smooth shaft: Low cogging, precision dynamic performance for high-speed applications

3. Resolver feedback: Extreme durability in harsh environments, maintenance-free

4. IP65 protection: Dust-tight and water-splash resistant

5. Low inertia: Excellent dynamic response for high acceleration/deceleration

6. Dual M23 connectors: Flexible wiring, space-saving, anti-vibration

7. Brake-free design: Lower inertia, ideal for high-speed horizontal axes

7. Compatible Drives

• Kollmorgen AKD series (P03607, P04807)

• Kollmorgen AKD2G high-voltage series

• Supported protocols: Resolver, EtherCAT, PROFINET, CANopen

8. Typical Applications

• High-speed packaging, labeling, sorting machines

• Textile winding systems, high-speed spindles

• Printing and converting equipment

• Machine tool spindles and high-speed feed axes

• Robotics, pick-and-place, high-dynamic positioning

• Applications requiring 6000 rpm, smooth shaft, IP65, resolver feedback

9. Summary