SEM MTS30M4-38C

Product Name:​ SEM MTS30M4-38C DC Brushed Servo Motor
Product Introduction:
Manufactured by Servo Dynamics (SEM brand lineage), this is a medium-power DC permanent magnet brushed servo motor designed for high dynamic response industrial automation, featuring silver-graphite brushes and ceramic washers for extended life.
Category:
Description
Technical Specifications & Performance Parameters:
  • Rated Voltage:​ 140 VDC
  • Maximum Speed:​ 3700 RPM
  • Continuous Stall Torque:​ 26 lb·in (≈ 2.94 Nm) TENV; 49 lb·in (≈ 5.5 Nm) blower cooled
  • Continuous Stall Current:​ 8.6 A (TENV)
  • Peak Stall Torque:​ 124 lb·in (≈ 14 Nm) @ 47 A
  • Torque Constant (Kt):​ 0.35 Nm/A
  • Voltage Constant (Kv):​ 0.35 V/(rad/s)
  • Armature Resistance:​ 0.82 Ω (less brushes)
  • Armature Inductance:​ 6.5 mH
  • Rotor Inertia:​ 0.0017 kg·m²
  • Thermal Class:​ F (max ambient 40°C)
  • Weight:​ ≈ 7.3 kg
Material & Structural Features:
  • Brushes:​ Silver-content graphite for low noise and long life
  • Washers:​ Ceramic washers (Version C specific) for improved thermal/electrical insulation
  • Shaft:​ 1.87″ length, 5/8″ diameter with 1.5″ key
  • Feedback:​ Built-in 7 V / 1000 PPR tachogenerator; standard encoder mounting face
  • Flange:​ SD55 (A1-B type) industrial flange
Functional Features:
  • High torque-to-inertia ratio for rapid acceleration
  • Compatible with most DC servo drives (Indramat, Yaskawa, Kollmorgen, domestic brands)
  • Closed-loop capable via tachogenerator + encoder
Applications:
  • CNC machine tool feed axes (X/Y/Z)
  • Conveyor sorting systems
  • Printing registration rollers
  • Robotic joint actuators
  • Packaging and textile machinery
Installation & Usage:
  • Mount via standard flange bolts; ensure shaft coupling alignment
  • Periodically inspect brush wear despite silver-content longevity
  • Use flywheel diode protection on drive output to protect brushes from arcing
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