Digital guide
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KOLLMORGEN B-404-B-A1-S
Product Brief: The Goldline B-Series was Kollmorgen’s premium legacy brushless servo motor line featuring segmented stator construction and high-energy rare-earth magnets. The B-404 denotes a medium frame size with 404-series stack length. “-B-A1-S” defines: B = Goldline B family, -B = Brake (spring-applied 24 VDC fail-safe), -A1 = specific winding/feedback option (often resolver or incremental encoder), -S = shaft/seal/config option (usually standard smooth or keyed shaft, metric/English, IP54-ish). These motors were typically paired with SERVOSTAR CD/S200/S300 drives.
Detailed content
General Specifications (B-404 typical range):
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Construction: Segmented stator lamination, NdFeB magnets, stainless steel or epoxy-coated rotor
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Continuous Torque: Approx. 3 – 6 Nm (depending on stack/winding)
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Peak Torque: 2×–3× continuous
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Rated Speed: 1500 – 3000 rpm (winding dependent)
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Feedback: Usually 2-pole resolver standard; optional incremental encoder
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Brake: 24 VDC spring-applied, manual release (where -B- code present)
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Winding Voltage: 120/240 VAC or 320 VDC bus compatible
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Insulation: Class H or F (depends on vintage)
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Protection: IP54 typical (some IP65 washdown versions existed)
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Mounting: Flange mount (NEMA/IEC compatible)
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Cooling: Natural convection (some larger stacks had finned housing)
Features:
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Extremely low cogging and smooth rotation.
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High acceleration capability due to low rotor inertia variants.
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Proven reliability in semiconductor, medical imaging, and packaging.
Applications (Legacy): Wafer handling robots, medical diagnostic equipment (CT gantry, MRI table), legacy packaging lines, textile machinery, lab automation.
Notes:
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This is a discontinued (legacy) product; replacement is typically AKM series of equivalent torque.
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When replacing with AKM, verify flange pattern, shaft size, feedback compatibility, and brake torque.
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Use only with drives supporting resolver or matched encoder type.
