Better parts. Better servos. The formula is simple.
Price: $109.99

    Item #: DS345BLHV
    Availability: Discontinued notify me

    Order this servo and receive a DS555BLHV - keep reading . . .

    Note; we have deprecated the DS345BLHV after a long production run in favor of the DS555BLHV (555oz-in - 0.06sec/60°).


    Developed initially as a 245oz-in brushless servo for our lead non-civilian client nearly a decade ago, ongoing iterative improvements saw it achieve many firsts on its way to becoming the popular DS345BLHV. Things like steel gears, bronze hard points in the aluminum, and conformal coating on the PCB (permitting it to handle more torque and live longer in high vibration environments) were first introduced in this, our top of the range unit. And it led to gaining converts from other brands.

    Meanwhile, it's been unchanged for the last three years, but because our competition never sleeps, then staying a step ahead of them means our research never stops, either. While this led us to introduced both the DS630BLHV and DS930BLHV (at necessarily higher price points), so now we've circled back around to the DS345 and have improved it yet again, resulting in the DS555BLHV. The best part is, this time you get more torque.

    Significantly more torque. Enough to outclass many solid choices for 700-800=class 3D helicopters, mid-size 3DXA models (105"), and 1/8th scale racing. Anyway, through the end of the calendar year, 12/2020 (giving us time to create the DS55BLHV product listing), orders for the DS345 will be filled with the DS55BLHV (we're done making more DS345BLHV).

    Bottom line? The king is dead, long live the king . . . the DS55BLHV. So while the DS345 is gone, please don't mourn it because this one's better! And by the way, the fact it's stronger and faster means you can install it on a 2-servo wing panel (one a DS470 and the other a DS55), or a 3-servo swashplate - and - never notice a difference because it'll be a transparent match since it can keep up with the old one in both torque and speed.

    Moreover, you'll find the DS555BLHV is a worthy successor because we've retained all the good points that made the DS345 such a winner - like bronze hard points for the steel gear shafts, 13 o-rings for sealing, conformal coating of the PCB . . . and all whilst keeping costs in check!


    This is our top-of-the-range 345oz-in high voltage brushless servo created expressly for competition. Perfect for cyclic on 3D model helicopters, strong enough for 100cc IMAC models, and superb for 1/8th scale trucks, and so precise, it's ideal for use in jets. Is it any good? Well, of course . . . but what do you expect us to say? But please, don't take our word for it. Instead, listen to what competition pilots (not sponsored pilots who'll say what they're told), but real honest-to-God pilots - who pay for their own servos . . .

    Mihai Aldea writes . . . "I'm very happy with my choice of putting the ProModeler S245BLHV servos in the Goblin Speed. Not only are they superlative performers, but the cost is unbeatable. I'm not usually an early adopter of anything, but your record of common sense design and customer service made this an equally common sense choice for me."

    - Mihai Aldea, Issaquah, WA

    Joe Meade writes . . . "I decided to give these servos a try in my Goblin 700 just over a year ago and I'm glad I did. Beautiful servos that perform flawlessly, and at a fraction of the cost of similar servos. A quality product that has performed without issue for over a year, these servos are sweet, and I couldn't be happier. I can't imagine ProModeler servos will remain a secret for long. I'm pretty sure these are what we call a no-brainer."
    Joe Meade of Tram, KY and his Goblin 700 equipped with a full suite of ProModeler brushless servos

    - Joe Meade, Tram, KY

    Jim Dyck writes . . . "Just had to say thanks for making such a great servo for such a reasonable price. I got these on my Kasama Srimok and couldn't be more pleased. I like them so much I got a second set for another heli. I really like how quiet (as in silent) they are, too. Will definitely be getting more of these in the future."
    Jim Dyck of Ridgecrest, CA and his ProModeler brushless servo equipped Srimok 90
    - Jim Dyck, Ridgecrest, CA

    Daniel Murnane writes . . . "I've been running the S245BLHV on one 700 for about a year now and have been very impressed with their performance and durability. This set has survived a rekit crash and is still going strong today. Since getting then I've put sets on another two helis."

    - Daniel Murnane, Randallstown, MD

    A man of few words, George Meccariello writes . . . "After 200 flights they're working great. No slop, no problems, and being brushless they'll definitely last well beyond another 200 flights!"

    George Meccariello, Valley Stream, NY and his Pantera P6 equipped with a full suite of ProModeler brushless servos

    - George Meccariello, Valley Stream, NY

    Rob Nourse writes . . . "I have been flying the ProModeler servos in my Logo 600 for about 5 months. They are absolutely flawless cyclic performance. Quit looking, get these for your bird and I promise you, these will be your new servos of choice."
    Rob Nourse of Springfield, TN and his Logo 600 equipped with ProModeler S245 brushless servos

    - Rob Nourse, Springfield, TN

    And lest you think these servos are just for things, which fly . . . you're right because 1/10th scale racing trucks can fly too! Like when they catch big air off a table-top jump or while going through a series of whoops. That's when they're being stressed as much or more than in a airplane or heli. Steering duties for a racing truck requires a great deal of finesse from a fast and strong servo, which centers great (especially when drifting through corners when it's critical). What's more, durability is essential because you can win if you don't finish.

    Tim Braucht writes . . . I'm using the S245BLHV for steering on a 1/10 4x4 short course truck I built to race. This servo has been great and I couldn't ask for more. It's strong and FAST!!!
    Tim Braucht and his 1/10th truck with an S245 for steering
    - Tim Braucht, Wilmington, DE

    Do you know the difference between coreless and brushless servos? Don't get confused, what you want are brushless servos . . . this really matters!

    Marketing - some companies market servos specifically to model helicopter pilots, giant scale modelers, robot-builders, or model car drivers - as if servos knew in what they were being installed. This may explain why reducing the servo-lead from 10" to 6", changing the part number, and selling it as a truck-servo works in the minds of marketing-types. We don't play those games because like you, we know what matters is a) whether the servo is strong and fast enough for the job and, b) more important than anything, how well it centers. If centering performance is what's important to you, you'll appreciate knowing ProModeler servos use MIL-SPEC components because we believe centering is the Holy Grail of servo design. While stick bangers don't know the difference, centering is a big deal for pilots flying precision maneuvers. This matters - period.

    Advice - if you are unsure about the best servo for your application, don't just take the advice of some anonymous 'expert' on a forum, or buy whatever your buddy thinks is best. Instead, give us a call and ask because we have the experience to help guide you. Best of all, our advice is free (and worth every penny) and because we have a solid reputation for honesty and offering common-sense no-bull answers, you can trust we won't sacrifice our reputation just to upsell you on something a little bit more expensive. Especially because we know that when you're happy, you'll tell a friend . . . but if you're unhappy you'll tell everyone!

    Bottom line? Reputations are earned and we value ours above merely making an extra buck so go ahead and ask us.

    Wind the lead and heat for a few seconds for a clean professional installation

    - Pro Tip: Winding the lead and heating it for a few seconds gives that clean professionally-installed look

    At 347oz-in, the Hitec HSB-9370TH is a near match for the 345oz-in DS345BLHV. The Hitec is an immensely popular servo (meaning lots of folks at many flying fields have experience with it), and it's the subject of a competitive teardown. To begin, the HSB-9379TH is a very attractively finished servo due to its black plastic top and bottom case components combined with a red anodized aluminum center. They create an eye catching servo. Let's compare and contrast these two servos to see what we can learn.

    Featuring a case, which is CNC-machined from a solid billet of aircraft aluminum, there's little doubt which is stronger and more durable. A case CNC-machined from a solid billet of 6061-T6 aircraft aluminum is the ultimate in protection and rigidity. The last is especially important when durability is a prime concern because a rigid case maintains geometry better under load. While ProModeler use a similar hybrid aluminum/plastic construction for less expensive servos, like our DS130DLHV which is offered for $29.99, the DS345BLHV is a our top of the line servo and thus, receives our best effort at providing good value. Moreover, note our use of 6 Allen head fine thread machine bolts for securing the transmission section (the upper case) to the center case. This, versus the Hitec method, which is assembled with 4 coarse screws - and note - these tap into the plastic upper case. However, not until after entering through the bottom cover (and passing clear through the aluminum section). Also, there are two smaller coarse screws (that also threaded into plastic, this time the upper-center section). Basically, while we assemble our components by individually securing them to the aluminum center section, they do clamp theirs together by threading into plastic. Our way costs more (and we feel it's stronger) but what matters is what you think is the better way to go.

    Protecting the control electronics is important consideration during a crash. For this, our top of the line servo, we opt for an aluminum electronics cover (the bottom cover). While it's not really bullet proof, it's certainly going to protect things better than plastic. But what's important to notice in the above image is the grey silicone shock pad. While seemingly a simple component, It plays a key role in impact protection. And quite frankly, it doesn't cost very much which is why we were surprised to see our competition deemed it unnecessary. Then again, we're not building to a hobby-standard but to the far more demanding military-standard. While this may amount to a nothing burger for some, experienced modelers with an eye for detail always notice the little touches.

    While it looks like the same picture, look again. In this one we've peeled back a corner of the shock pad to show you the the monkey snot on the board. Sure, some may think calling it monkey snot is gross, but the conformal coating on the PCB (printed circuit board) is a genuine improvement in the area of vibration protection. It's a dirty little secret of the electronics world but government regulations governing solder composition mean the good stuff from the good old days isn't legal for use. As a result, the use of a conformal coating has become of paramount importance in providing added reliability. Since models have a propulsion source, typically an electric motor or an engine vibration protection is an essential consideration. Whether it's an unbalanced prop, the pounding from the piston stroke, or the back straightaway of a rough race track, vibrations may destroy delicate electronic components. Monkey snot came about for the aerospace industry and migrated to military uses and into the best quality electronic products. It comes in various colors, black, white, clear, etc. but which color doesn't really matter as much as ensuring your servos are protected with the stuff. After all, you work hard for your money and ensuring your investment in a servo lasts (and more importantly, doesn't result in a senseless crash because a manufacturer took a shortcut) can be a big deal. Since the class of modeler using this level of servo is generally uncompromising in all things, making sure you get what you 'think' you're paying for is a big deal . . . especially if you're one of those for whom details matter.

    So what's the big deal about using an aluminum cover instead of a plastic one to protect the PCB and the bottom of the motor? It matters - but only if you have something worth protecting. Note the four DIN912 machine thread bolts, complete with o-rings. These have an Allen head (hex) instead of a Phillips head (cross) and while they cost a little bit more, they are 'much' preferred by savvy modelers because they are just easier to use. Also notice the main o-rings - with our servo it's completely captured. This means totally hidden from view such that the odds of it being damaged are basically nil. Meanwhile, our esteemed competitor's main o-ring is exposed (visible) on all four sides - believe it or not! This puts your servo (and thus, your model) at risk if it's inadvertently nicked. Some would say this has to do with reducing costs but we won't presume to judge preferring to leave that to you.

    Overall Customer Rating of 14 Reviews:

    A clear winner among the rest!

    • Super quality
    • Finely finished
    • Great phone support
    • Smooth performance
    • Great centering
    So I had finally settled down and decided to build my own electric 3d machine, as opposed to buying used machines . . . a little background info, I've been flying helicopters for close to 30 years and advancing continually. I have my own style of flying that is heavily reliant on the rudder, some flights consist of constant pirouette manuevers, tick tocks, flips, loops, etc. while pirouette during the entire pack. Not smack flying necessarily but I gravitate there occasionally.

    Being heavily into pirouette work, I need cyclic servos that deliver power in a very defined manner . . . that is they need to possess the ability to give me fine minute adjustments with authority. As well as large precise inputs to cover the occasional corrections, which culminate into manuevers that look like no correction was made. Or just precice large cyclic manuevers. These are powerful servos that can tackle large cyclic inputs with no stall, but the silky feeling back at the sticks is something I've only felt with the ProModeler servos. Then there's the build quality, they look like they were built with a specific purpose, and there's the great summary on the care that went into making these. Don't get me started on price comparisons of the competition because, there is no competition. These servos have power, precision, excellent build quality and price point, and a live significant person you can easily reach out to concerning these servos if you have questions.

    When I was searching for servos for this build I was overwhelmed by how many servo manufacturers were out there . . . I noticed many of them had catchy graphics on them, like here buy me I look cool. Yeah, but what's inside? They don't show you and dn you're expensive, also how's the support? I'm sure many of those servos are great performers, but they easily lose out on the price point, and thusly, all the other attributes mentioned earlier concerning ProModeler servos.

    ProModeler make the best servos thanks!

    It has done everything promised.


    Responsive. Quick product. It has done everything promised.

    Colfax WA.

    Great service with no bull


    When I talked to John on the phone about this servo he did not put down the Futaba I was thing about buying his statement to me was simple, "Theirs are good, but ours are better" so I ordered 2 of these for a Kyosho Inferno GT 3 kit' and I am glad I did. These servos just scream quality as soon as you touch them. The other side of this coin is that John is such a great help for picking out the right product to purchase with no bull attached. Thank you!

    St. George, Utah

    Fantastic Servos!


    I put five DS345BLHV in my Skywing 74” Edge 540 v2 and wow! The response is fantastic with no blow back and the centering was spot on. Putting out this much torque in this size of aircraft may be a little overkill, but paying a little extra for a premium servo is well worth it to me. Will definitely be putting in ProModeler servos in all my future projects.

    Smyrna, GA

    Very nice all around.

    • Look great and really quiet
    • none

    Great looking servos, and no buzzing while stationary. These are my first experience with these good, fast servos, and I'm impressed.

    ProModeler took care of a small problem with my order while Hurricane Dorian was on its way showing super customer service. Great company to do business with.

    Columbus, MS

    Excellent Servo


    I have 3 of these on the swash of a 700 Electric helicopter. They centered well during setup, so that was good. I've been flying them all summer, and I have been impressed. The electrical draw on these are surprisingly low, and the price/performance is spectacular. Not to mention the support is unequaled.

    Freakin’ Awesome!

    I love these servos so much! They are super powerful and very quiet. The centering is precision. Everything about these servos just screams quality. The only bad thing is now I have to order a bunch more Because I’m spoiled now. Thanks a lot John

    San Jose, CA

    Another Four DS345BLHVs..

    • Wonderful servos
    • None!!
    Just wanted to say, I just bought another four of these servos, and every time I get some I just have to marvel at the fit and finish on them. I have machine tools in my shop and I would be in pure 'hog heaven' if I could get that kind of finish on my machined parts. But of course, they are also great servos period!!


    It works the first time.

    I bought this servo for my Traxxas Slash 4x4 lcg. No hassles. Just plugged it in 6v. and off we go. Turns fast and has plenty of torque. Steering goes back to center with authority also. This servo will go in future RC trucks and buggies.

    Great servos for the price!


    Put these in a Vibe 50 I rebuilt and what a difference! Running them on a straight 2s LiPo. Fast, strong and really quiet. No buzzing around neutral. I've only got a couple gallons on them so far but no signs of wear or slop. I'll be using more of these for sure.

    - Jim Crider, Little Hocking, OH

    San Jose, CA

    These are dead silent!

    • Quality
    • speed
    • centering
    • none
    These are my first ProModeler servos, but based on the performance of these, I sincerely doubt they will be my last! I put four in my 3DHS 75" Edge, and they have performed flawlessly!

    One thing that surprised the heck out of me is how quiet they are because I am used to other servos, that while very good, are also quite noisy. When I first powered the radio system/servos up in my plane, I literally thought something was wrong because I was so used to the noise from the other ones - these were dead silent!

    I am very happy with everything about the DS345BLHV servos ranging from the appearance, the speed, the centering to the nice long lead.

    While I am not a good 3D flier, I do try to fly them hard, and I think these servos are going to hold up quite well.

    - Steve Tillman, San Jose, CA

    Port Washington, NY

    Spectacular quality! I'm impressed...

    • Build quality
    • Speed
    • Precision
    • Appearance
    • Communication with company
    • Solid built means a little more weight
    I just finished building the biggest plane in my hangar, a 3DHS Edge 75". I wanted the electronics to be as precise and bullet-proof as possible. Based on the recommendation of our field's top pilot I went ahead and bought 4 of the brushless standard sized servos. They are unlike any other servos I've used before. The case is machined out of a solid block of aluminum, and gives it a very serious, professional look. Although I only have 1 flight on the plane so far (still have gusty winter conditions where I live) the servos are incredibly fast, responsive and precise. They give the plane a professional appearance and feel much more so than any other servos I have yet used. I was impressed enough that I have added the ProModeler decal to my plane's tail and wings. These servos are certainly not cheap -- I think they're the most expensive servos I've ever bought -- but they represent an excellent value. I will without a doubt be a repeat customer. I can hardly wait to try the micro servos for my next Precision Aerobatics build.

    - Daniel Herron, Port Washington, NY


    I can say that I have been most pleased

    I have purchased - at a guess - 40 or more ProModeler servos. Basically, all the different models offered at some point or another. I can say that I have been most pleased with the performance of all them. For me, I gauge what I spend my money on in the RC market in two ways, quality of the product and the quality of the service. They do this very well on both fronts. I'm just a sport flyer but I try to buy the best that my money can afford me, and these servos fit the bill.

    - Tom Hillsman, Chester, VA


    Best servo's for the price!!

    I purchased one of the earlier models a couple years back (brushless 345oz). It has been used in my son's Wraith and has been perfect! The quality of these servos are fantastic. I just picked up my 2nd servo from Pro-Modeler (470oz brushless) and it's working flawlessly so far. The quality on these speak for themselves at a reduced cost of the brand I used to buy. Love em.

    - Matthew Disalvo, Gridley, CA