• 160oz-in Digital HV
  • 0.07sec/60°
  • Coreless Motor
  • Metal gears (25T spline)
  • Dual ball bearings (ABEC-9)
  • O-ring seals (qty 13)
  • 37 grams
Price: $59.99

    Quantity:
    Item #: PDRS160CLHV
    Availability: In Stock
    Usually ships In 1-2 Business Days

    You're interested in mini-class servos. Let's cut to the chase. This HV mini is designed for 2S LiPos but has been optimized for the 8.4V output of popular BECs. Of course it has metal gears (plus dual ball bearings), but we know what caught your attention:

    • 160oz-in Digital HV
    • 0.07sec/60°

    But there's more to this super mini than quick control deflection and enough muscle for extreme maneuvers. Things like MIL-SPEC components give you precise centering, the 13 O-rings make it waterproof, bronze inserts reinforcing the polymer case make it both light and strong, plus a conformal coating on the PCB protects against vibration. Along with the center case that's CNC-machined from a solid billet of 6061-T6 aircraft aluminum (plus a press-fit coreless-motor) this means the cooling fins aren't decorative.

    Is this the best mini-class servo ever? Probably. To get down in the weeds with technical details click the TL;DR tab above, otherwise, just add it to your cart and move on to other important matters.

    Last thing, if you're interested in a yet faster super mini, our S110CLHV (110oz-in) transits in a mere 0.035sec/60° and if you'd prefer an all-aluminum super mini our brushless motor equipped S160BLHV fills the bill.

    Tired of compromising on mini-size servos? You know; small enough to fit but neither strong nor fast enough to deliver the torque and speed needed for the maneuvers you want to fly? Would a mini that delivers 10 pounds of force do the trick? What if it was also stupid fast - like 0.07sec/60° - would that suit your requirements? If you need no-excuses high performance, then this mighty-mini is the one you want.


    Not exactly Superman's x-ray vision, but this CAD image shows off the inner design details very nicely.
    - Maybe not Superman's x-ray vision, but this CAD image clearly shows important details.

    EXECUTIVE SUMMARY

    Details count and at the heart of this high-voltage mini-class digital servo is a high performance coreless-motor delivering 160oz-in via metal gears. You'll also find a genuine Nobel potentiometer (instead of a knock off). Along with huge metal gears, dual ball bearings, a CNC-machined aluminum center case (plus 13 O-rings for sealing), and conformal coating on the PCB to protect against vibration, these components combine to make for a great mini-size servo. Experienced modelers find it ideal for 3D electric acrobats of about 60" wingspan. Pattern pilots love this servo because of the superb centering performance. And because jet are fast and need a lot of power to move the control surfaces, they're ideally suited for this servo. Ditto model helicopters because every pilot lusts for faster cyclic servos. Also, because it's waterproof, it's a great choice for flying models off water. Basically, even without x-ray vision, the S160CLHV is clearly a great choice.



    COMPETING SERVOS

    Next we'll dive deep for a down-in-the-weeds look at how it's been created, but before we do, let's see how we match up to our competitor's specs (using mail-order pricing). The upshot? None are faster, none are stronger, and while one costs less and two cost the same, all the rest cost more! Thing is, none are built even close to as well as the S160CLHV . . . and we can prove it.

    • ProModeler S160CLHV . . . @8.4V, 160 oz-in, 0.07sec/60°, $59.99
    • Futaba S9650 . . . @6V, 63 oz-in, 0.11sec/60°, $59.99
    • Hitec HS-7245MH . . . @7.4V, 89 oz-in, 0.11sec/60°, $69.99
    • JR DS3717HV . . . @7.4V, 56 oz-in, 0.08sec/60°, $94.99
    • KO Propo RSx3-12 . . . @6V, 104 oz-in, 0.13sec/60°, $112.99
    • MKS DS-9660A+ . . . @6V, 65 oz-in, 0.09sec/60°, $69.99
    • Sanwa SRG-HR . . .@7.4V, 64 oz-in, 0.10sec/60°, $109.99
    • SAVOX SH1350 . . . @6V, 63 oz-in, 0.11sec/60°, $48.99
    • Spectrum A-5060 . . .@7.4V, 118 oz-in, 0.11sec/60°, $59.99



    DELVING DEEPLY

    First, every great design begins with a solid foundation. This is why instead of relying on a cheesy aluminum extrusion for the center case, we went the extra mile and CNC-machined it from a solid billet of 6061-T6 aircraft aluminum. And to help better dissipate heat, note how the motor is pressed in for optimal heat transfer. What should you watch out for in other servos? Well, most use all-plastic case construction, but amongst the ones that offer an aluminum center case, none are CNC-machined. Instead, they rely on an aluminum extrusion (just like Play-Doh, no kidding). Worse, those don't make good contact between the aluminum case and the motor and thus, can't dissipate heat properly . . . so what's the point of having it at all - looks? Don't be fooled.
    No cheesy aluminum extrusion, the finned center is CNC-machined from a solid billet of 6061-T6.
    - No cheesy aluminum extrusion - CNC-machined from a solid billet of 6061-T6 instead.

    Second, in addition to the aluminum center section, there are two fiber-filled engineering-polymer case components. These are the electronics section (the bottom cover) and the transmission section (the top case). Both are injection molded of Nylon 6,6, (the same tough impact resistant material used in Glock handgun frames). Another thing to watch out for are the number of bolts in the case assembly. Our competitors typically use 4-long bolts while we use 10. Theirs go through the bottom cover, pass straight through the center section (whether it's plastic or aluminum), and thread into the plastic top case. Basically, they just clamp the center between the two plastic pieces. The problem is that's 300% weaker than our 10-bolt system. Moreover, our screws don't thread into plastic but into aluminum! This is important. Next, our case assembly is sealed with 13 o-rings . . . none of our competitors are waterproof. Does it matter? It does if protecting your investment against environmental intrusion like water, exhaust oil, etc. is important. We do it because we're experienced modelers and know how a pop up rain shower may douse your model before you can land, or how a helicopter's exhaust may drench the servos during backward flight. Anyway, our servo features two large o-rings to seal the three major case sections. There's another one where the output shaft protrudes through the top case. Finally, there are 10 more, itty-bitty ones beneath the head of each bolt. Note, instead of cheaper coarse-thread Phillips head screws, we use hardened Grade 12.9 Allen Head machine-thread bolts because they're better.

    - Details count – note the two bronze inserts reinforcing the polymer top case.

    Third, and it's a little touch, but note the two bronze inserts in the upper case. These function as hard points for where the steel gear shafts fit into the case. They're designed to help the case handle high forces (by spreading the load from the steel gear shafts through more of the case material thereby lowering the psi at these points). Basically, this helps the tight fit to last longer! What to look for in competing products? Basically, the shaft pockets in their top case (the holes) aren't reinforced. This means they will go egg shape under high loads and because of this, result in excess backlash in short order. Granted, this doesn't matter much for a servo outputting just 50-60 oz-in, but ultimately, whether it's a Porsche or a servo, quality always comes down to the details. If you wonder why competitors charge so much when they leave out the goodies you're in good company because when we took apart the ones we bought, we wondered as well.

    Fourth, you expect - and get - dual ball bearings. However, with our servo you get ultra high precision ABEC-9 bearings. Competing servos? They don't say but we sent off the bearing (from the sample servos we bought) to our supplier and learned they're ordinary ABEC-3 bearings. Could this be why they don't mention what they use? Anyway, the finer tolerance of an ABEC-9 bearing is what you want because you'll get less play.
    Massive metal gears plus o-ring sealing.
    - Massive metal gears plus o-ring sealing.

    Fifth, eyeball the massive metal gears. Their width is actually more on a par with what you find within standard size servos. We do it because greater surface area reduces the working pressures and hence, you get longer gear wear. This is simple physics but it really means your investment will give you more years of pleasure. And note, for compatibility with servo arms you may already own, we opted for an output shaft with 25 splines (Futaba-compatible).

    Sixth, this servo works with voltages ranging from 4.8-8.4V thus, earning a high voltage (HV) designation. Since a lot of folks like to use a BEC set to 8.4V we've made sure this servo is optimized for this reality but the facts are we prefer (and recommend) using an unregulated 2S LiPo battery, instead. Why? Simply because it's a much cleaner source of power. Learn more here: The case against BECs

    Seventh, because centering is the sine qua non of a high performance servo, we use the best MIL-SPEC components we can buy. Do others? They don't say so draw your own conclusion, but in addition, we use a genuine Nobel potentiometer instead of a cheaper clone. Competitors don't mention this either but our using the real Japanese component results in the best possible centering performance.

    Eighth, because models have many sources of vibration beyond an engine, e.g. even an electric motor may vibrate, we protect the PCB (printed circuit board) with an expensive conformal coating. This is exactly how the military and NASA protect components against vibration. And don't forget, even the prop and spinner are potential sources of vibration. Ditto wheels vibrating on an axle. These sources all combine to feedback into the servos leading to potential damage. While only God is perfect, making electronics as close to bullet proof as possible is another detail that separate us from everybody else.
    Potting compound protects the PCB, and note the o-ring on the bottom cover.
    - Potting compound protects the PCB, and note the o-ring on the bottom cover.



    Summary

    In the end, our goal is to offer you the best mini-size servo in the world. We've put our best thinking into creating it and believe we've succeeded. Of course, the only thing that matters is what you think but if you can think of any improvements for this servo, we'd love to hear from you. In closing, if you want a strong and precise mini that centers superbly, one where you get attention to every possible detail - whether it's using a conformal coating on the PCB or bronze inserts to create hard points in the case - then bear one thing in mind . . . none of this happens by accident. This no-compromise mini-class servo exists because like you, we're modelers too. Moreover, instead of letting the accountants call the shots, we turn our engineers loose to solve problems without regard to costs and let the chips fall where they may! Bottom line? If you're the kind of demanding modeler for whom servos aren't a trivial consideration, then this is exactly the mini-size servo you've been looking for. Last thing, if you're wondering whether this 37g beauty will fit, here are the dimensions.


    Dimensions in millimeters.
    - Dimensions in millimeters.

    Overall Customer Rating of 1 Reviews:
    Moline il

    Best bang for buck

    Rating:
    Pros:
    Cons:
    <p>I've used a lot of different brands. These are really great in my pattern plane. Super fast, powerful, smooth and quiet. The centering is perfect every time. Will be my go to brand for my next project too.</p>