HobbyStar HCS-4521 High-Torque Digital Waterproof Crawler Servo


The HobbyStar HCS-4521WP servo features a fully waterproof design and massive-torque (444oz/in @7.4V) for the ultimate crawler servo. All-steel gears for reliable operation and an aluminum center-case to aid in cooling and add strength this is a perfect servo for crawling rig. 



  • Speed @4.8V: 0.16 sec
  • Speed @6.0V: 0.13 sec
  • Speed @7.4V: 0.10 sec
  • Torque @4.8V: 287 oz/in
  • Torque @6.0V: 347 oz/in
  • Torque @7.4V: 444 oz/in
  • Pulse/Frequency: 1500µ/330Hz
  • Dimensions: (LxWxH) 40.5x20x37.5mm
  • Weight: 58g
  • Bearing: Dual ball bearing
  • Gears: Steel
  • Motor: Digital Coreless
  • Input Voltage: 4.8V-7.4V
  • Output Shaft: 25T spline
  • Wire Harness Length: 260mm 

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