Digital guide
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Kollmorgen B-404-A-23
Product Overview:
The B-Series Goldline motors were Kollmorgen’s premium pre-AKM brushless servos. “B-404” refers to a medium-power frame (roughly NEMA 42 / 104 mm). “-A” = winding code (voltage/speed/torque constant). “-23” = feedback/resolver option or custom mod. These are often found as housed motors or frameless stator/rotor kits.
Detailed content
Typical Characteristics (B-404 framed motor):
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Frame Diameter: ~104 mm (4.0 in)
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Rated Torque (cont.): ~7–12 Nm (winding dependent)
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Rated Speed: 1500–3000 rpm
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Bus Voltage Compatibility: 240–320 VDC
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Feedback: Often 2-pole resolver or incremental encoder (option -23 defines this)
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Thermal Class: Class H (180 °C)
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Magnet Material: Rare-earth Samarium-Cobalt or Neodymium
Notes:
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This is a legacy/discontinued series; refer to original B-Series datasheet for exact winding curves.
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Still commonly supported in existing retrofit/legacy systems.
