SKU: 49534193752

HobbyStar HCS-4521 High-Torque Digital Waterproof Crawler Servo

Sale price$32.36 Regular price$35.95
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Ships within 48 hours · Estimated delivery Oct 30 - Nov 4

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For Your Every Summer RSVP, with Code: SUMMER15

Description

HobbyStar HCS-4521 High-Torque Digital Waterproof Crawler ServoThe 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. Specifications: 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

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. 

Specifications:

  • 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 
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49534193752

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4.5 ★★★★★
Based on 27 reviews
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Naomi L.
Phoenix, US
★★★★★ 5
Wonderful
Super comfy and easy on and off, yet stylish imo! I could walk miles in these as a 56 yo and have worn them for three years! I hope they never stop making them. The only tweek I would suggest is to cover the footbed with leather or suede not cloth so they would last longer!
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Reviewed in the United States on April 15, 2026
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Verified Purchase
Johsz Family
Dallas, US
★★★★★ 5
Great value and super comfy!
Size: 7, Color: Sand
These shoes are so comfortable and my new go to for summer. They are lightweight and fit like a glove. Great value
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Reviewed in the United States on May 25, 2026
K
Verified Purchase
Kindle Customer
New York, US
★★★★★ 5
Lovely sandals!
I highly recommend! These are so comfortable! Right out of the box, they can be worn all day. The velcro-adjustable straps are great for making for a perfect fit. The aren't clunky to wear, even though they appear to be. They're super cute, in my opinion. The sock liner is textile, so feet feel good all day, not slimy, like leather and suede can sometimes make feet feel if socks aren't worn.
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Reviewed in the United States on March 17, 2026
P
Verified Purchase
Pamela
Grantham, US
★★★★★ 5
Cute and Comfortable
Size: 10, Color: Black
This is my second pair. I bought the sand color at my local Macy's. I got their last pair. I have issues with back pain and ankle swelling and pain. These are so comfortable I had to get them in Black. The adjustable straps are great. My feet are a little bit wider because of the swelling issues. So if you have very narrow feet these might be a little big. You might want to go down a half a size. But otherwise I wear a size 10 and they fit perfectly. I don't think the picture does the color justice. The black almost looks like velvet, it's very deep and rich. I wore them out today for the first time and got lots of compliments. The footbed is very comfortable with the memory foam. Lots of support. I noticed my back and ankle pain is much better wearing these. I've never owned UGG before. If these hold up really well and continue to stay comfortable, I will be purchasing other styles for fall and winter.
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Reviewed in the United States on May 1, 2026
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Verified Purchase
Tilly
Dallas, US
★★★★★ 5
Great fitting sandals
Size: 7.5, Color: Sand
Great fitting. Beautiful. Fit like a glove. Great to walk in. Great quality. Lightweight. All in one gorgeous sandals.
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Reviewed in the United States on May 11, 2026

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