Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z

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Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
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This is the HS-645MG Metal-Geared, Coreless, Ball Bearing, Hi-Torque Servo from Hitec. This version of the servo has a universal connector which will fit Airtronics, JR, Hitec and Futaba receivers (be careful with the polarity of the connector for Futaba radios).

Specifications:
  • Speed:
    • 4.8V: 0.24 sec/60 deg.
    • 6.0V: 0.2 sec/60 deg.
  • Torque:
    • 4.8V: 107 oz/in
    • 6.0V: 133 oz/in
  • Length: 1.5in (38mm)
  • Width: 0.79in (20mm)
  • Height: 1.61in (41mm)
  • Weight: 1.95oz (55.2g)
Limited Warranty:
Hitec Servo Warranty: Each Hitec servo is backed by a limited two-year warranty from the date of purchase. Hitec RCD USA, INC. shall REPAIR OR REPLACE, at Hitec RCD, INC., defective equipment covered by this warranty, otherwise the purchaser and/or consumer is responsible for any charges for the repair or replacement of the product.

This product was added to our catalog on December 20, 2005

Anonymous
Tuesday, Feb 23 2010 (about 14 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Theres nothing wrong with this servo, or at least nothing wrong with the one i have. it has a VERY slight centering problem, and i cant tell when im driving. it is very quiet too. i like it.
Matthew Zorn
Friday, Dec 29 2017 (about 6 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
I've has these servos for quite a while. This is a high torque servo, and a slower servo as described in the numbers in the specs. So why is there a bunch of complaining with these servos???? If you don't understand the numbers in the specs, then get off your ass and call Amain for help!!!!!
Anonymous
Thursday, Nov 22 2007 (about 16 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Excellant value! Torquey and reasonably quick. Cant beat it for the money.
Anonymous
Wednesday, May 21 2008 (about 15 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
been running these for a few years now and always worked great for me. Reasonable speed wise....yes Cyber speed....well no.
Luis Gonzalez
Verified Owner
Wednesday, Jul 5 2023 (9 months ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Best attention to customer, many tks.
Keep up the good work.
Best regards
Luis
Adam Clark
Friday, Apr 1 2011 (about 13 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
I have this servo in my traxxas sport maxx which i bought a few years ago. i bought it when the traxxas one went bad which wasn't very long and it has worked great for me. no complaints at all.
SHANE FOOTE
Monday, Mar 1 2010 (about 14 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Decent Servo for the money. Hitec has great customer support.
Adam Fisher
Verified Owner
Monday, May 9 2016 (about 7 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Bought this servo for an Engineering project and while it works well at 5v, it kept glitching and failing to go to the correct positions at 6v. Would not recommend considering i could not get the maximum torque out of it due to voltage issues.
Anonymous
Sunday, Feb 28 2010 (about 14 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
mine broke the same day on my buggy, no good, trash!!!!!!!!!
Peter Burke
Tuesday, Feb 17 2009 (about 15 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
One word describes this servo, JUNK. Its slow its unreliable and just junk through and through. I bought one of these when i was in a bind and could not get my hands on a futaba, Never again would i buy one. Get the Futaba s3305, so much faster, 100% reliable, and the usual futaba quailty. I had one of each in a car and the futaba leaves it standing, this testing is of course in the real worls and not whats on the box, although they say they have the same speed at 6 volts the futaba is atleast twice as fast.
Anonymous
Wednesday, Jan 21 2009 (about 15 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
One word....JUNK!!!!!!!!! Really slow and fails quick. Used one has a backup servo for T/B and wasnt even worth the time . If you want a cheap good trq. servo go with a JR 650m great servo and its only 50.00
Anonymous
Sunday, Nov 25 2007 (about 16 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Michael, how can you say its even reasonably quick. Mine is really slow.
kenneth jeffries
Saturday, Oct 31 2009 (about 14 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
not a good servo for 1/8 buggy to slow i even try more powerful reveier batteries and it was still to slow,the centering is terrible this only seems to happen with the cheaper hitecs for some reason , one good thing is the torque is pretty good
Anonymous
Sunday, Jul 13 2008 (about 15 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
THIS IS BOLLOCKS I IS TELLIN YA :p...nah had one on my throttle/brake...KAPOOF...only one heat, total crap. My EPA was set an it still went. DONT GO THERE, spend the extra and get an ACE 1313.
Ryan Knaub
Tuesday, Jan 22 2019 (about 5 years ago)
Hitec HS-645MG High Torque Metal Gear Servo S/JR/Z
Tried to buy this at my local store and they had it priced at $65, when I showed them the $29 from the website they said “we sell it for this price” I.e. $65. Needless to say I’ll take my business to an online retailer, for that price I could get a good servo, not this wimpy one which was gonna be a throw-away in a week anyway.