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Kollmorgen B-404-BA-21-T

Product Name:​ Goldline® B-Series Low-Inertia Permanent Magnet Synchronous Servo Motor
Product Introduction:
The B-404-BA-21-T belongs to Kollmorgen’s well-known Goldline B family. It uses a low-rotor-inertia rare-earth magnet rotor for fast acceleration/deceleration and is intended for machine axes with frequent reversing or large inertia mismatch.
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Detailed content

Technical Specifications:
  • Frame:​ B-404 (approx. 4.0 in flange class)
  • Rated Power:​ ~3.4 kW (4.5 hp) at 2500 rpm variant; 5.4 kW at 5000 rpm variant
  • Rated Speed:​ 2500 / 5000 rpm (windings dependent)
  • Continuous Torque:​ ~13.1 Nm (at 40 °C); ~14.1 Nm (at 25 °C)
  • Peak Torque:​ ~36.6 Nm
  • Rated Current:​ ~9.9 A RMS
  • Voltage Constant:​ 250 Vrms/krpm
  • Torque Constant:​ 1.34 Nm/A RMS
  • Insulation Class:​ H (180 °C)
  • Feedback Support:​ Resolver or incremental encoder
  • Mounting:​ NEMA or metric flange, rotatable conduit box
Functional Features:
  • Low inertia → excellent dynamic response
  • High power density NeFeB magnet construction
  • H-class insulation for harsh thermal cycles
  • Built-in thermostat protection
Application Scenarios:
  • CNC feed axes
  • Packaging machinery
  • High-speed textile drivers
  • Pick-and-place actuators
Material & Structure:
  • Stator: laminated silicon steel, 3-phase winding
  • Rotor: bonded/sintered rare-earth magnets on steel hub
  • Housing: cast aluminum with gray industrial finish
Installation & Notes:
  • Align shaft coupling without inducing radial preload
  • Use only with matched SERVOSTAR / CD drives
  • Verify feedback pinout before powering

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