Crawler Canyon Presents: Servo Testin' Time, AGFRC A73, SA75, and A86

In which we over-test three offerings from AGFRC which include 2 direct-power, and one RX powered (though even that one is rated for 8.4V.)
Running the gauntlet today, from "affordable" to "yikes,"
A73CHLW
SA75CVSW
A86BUMW
Amazon Affiliate links to the tested servos:
A73: amzn.to/3GyroR2
SA75: amzn.to/3IaR6MW
A86: amzn.to/3VEKCZR
IG: crawlercanyon

[@curtisknudson8966]

YES! another 40min video! love it!

[@TheRCBuildersPost]

Shhh. Don't let everyone know about AGFRC 😂 been my go to servos for two years now. Once i found out they manufactured most of the "big" names, I went straight to the source! Great video

[@CDubs720]

It's linear. Torque = Force x Distance. So the closer the hole you use to the pivot, the more force you will be able to create from the same torque. By using a closer hole you don't gain torque, you gain force and the torque stays the same. Since the torque is given in ounce-inches, at 1 inch from the pivot you will get the actual torque described on the package (that is if each servo is giving the correct numbers from the factory - most underrate them). On that first pull at 8.4V, you got 548.4 Oz @ 23.5mm (or 0.925 in) so the actual torque created is 548.4 oz x 0.925 in = 507.27 oz-in. And on that first set of 3 pulls you got an average of 598 oz or 16.95 kg @ 23.5mm or 2.35 cm. So the actual average torque is 16.95 kg * 2.35 cm = 39.83 kg-cm. It's not kg per cm.

[@Oper8or]

You are correct but you have to take the leverage ratio into account for the force applied over any given distance. Otherwise you will have false readings or screwed outcomes based a single baseline. I wonder how much those numbers change based on the leverage of the servo arm.

[@Andy_Yates]

I bought one of the faster AGF 32kg servos on a whim. I think it's the brushless version of the A73 and it's sat in the packaging since it was delivered. I ended up going direct power on that project and this is effectively a spare. Some seriously respectable numbers from the AGF servos. Owning an A81BHMW running on a BEC, that one is a speedy beast of a servo (got it on black Friday last year). Thanks for these tests. These are both entertaining and educational for me. Also thank you very much for speaking about your results moving the turnbuckle closer to the center. I am running dual RS700s on my 4ws rig and set them up on the inner hole of those common aluminum horns. It seems they would make a bit more torque, but maybe only a little

[@GhostRider-ii7tz]

That was awesome.i have looked at the 32kg one before.but I got the 45kg servo for my rig and my brothers rig.looks like the 32kg will be next on my list of upgrades.👍

[@TheEchelon]

You've never watched RC Reviews' videos then. He started these servo measurement videos.

[@jjvizms]

Muy Bueno😁😁 just finished watching and I did not realize how much I would enjoy lol

[@meirdeaph]

That was awesome

[@nicholasstephey8475]

Another cool video

[@mitsuman5555]

You're doing the lord's work

[@NepDouble07]

I have the 32KG in my outcast 6s right now. My servo saver is terribly tight to the point it may as well not be a servo saver. I'm surprised the abuse it's taken.

[@Steve_J81]

When I hooked my SA75 to the programmer it was set to only output 85% power.

[@offroad1911]

With your videos, you have saved me quite a bit of cash and being on a budget that’s really helpful. I’m running 3 of those Flash Hobby 45 kg servos and they are working great for what I need at 7.4 volt receiver power with HW1080 esc’s.

[@jimbocreationsbu8203]

the SA75 servo is the ticket ,it has power /speed/and great price - no one realy needs the big one - that will snap an axle joint and won't even feel it - maybe a heavy Ryft - but i think the SA75 can take care off that no problems

[@kraafishjp538]

Will you try reefs,Holmes,ect

[@fejwe]

My mind was blown by my A86BHMW and now I know why. It's such a good servo. I run the receiver powered version at 7.4 it's impressive, and $40 cheaper than the direct power version. I didn't even know they made a direct power version, and I honestly probably won't try one--the receiver powered one already broke an axle on my Gatekeeper on a rock we call "$60 Rock" because of how many axles it's broken. That said, it was a good excuse to upgrade to SSDs. If you ever have the chance to check, I wonder how the A86 direct power version does on 7.4v, I'm guessing it's about the same as what I see with the receiver powered version.

[@themountain59]

As long as you have the servo in a 1/10 crawler you are golden....dont put it in a 1/8 buggy/truggy....dont ask how I know that😏

[@tomandrews5392]

32 kg not bad ..but you will need to retest at servos with same servo horn to make it right for all..

[@Oper8or]

After seeing this test I almost regret buying the FlashHobby 14v 50kg. The 32kg from AGFRC is almost as strong on 7.4v and its programable. I tried the 12v FlashHobby and it was cooked out of the box. These tests are proving to be VERY useful for me since I have no way to set up a test bench like that, nor do I want to. My only concern with the 32kg AGFRC is brown out at max turn with that kind of amp draw. I'm using a 1080 esc and I'm afraid it would either brown out or stall under load when the crawler is bound up.

[@CrawlerCanyon]

I've really been flying by the seat of my pants on some rigs-- Blue Sky High is running TWO A73s off of the internal BEC in a Fusion. Seeing those amp peaks makes me think I should really get an external BEC in there before I cook something... or everything.

[@Rombo-86]

@@CrawlerCanyon from hobby wing regards the fusion pro “With a strong built-in switch mode BEC, the continuous current is up to 6A, and support switch between 6V and 7.4v, easy to drive various powerful steering servos and high-voltage steering servo. “

[@Rombo-86]

@@CrawlerCanyon and by the way.. I love your videos. Can watch them for hours. You made me buy this 32kg servo and the rc6gs v3 radiolink to 🤩 keep up the good work. Wish to come see you sometime. I’ve would love to go to USA to meet you. Greetings from Sweden. Ps. I bought this servo from Germany for €49. Translates to $54

[@CrawlerCanyon]

@@Rombo-86 Yeah, the Pro got the updated BEC. I was running on a legacy 1800 Fusion at that time, which had the same BEC as the 1080, a 3A.

[@SnarkyRC]

The A73 now has a V2 version with better pins and stronger gears.

[@themountain59]

Not even a year ago ...somebody mentioned AGFrc, literally everbody on the forums were like : AGFrc ?? more chinese crap?? Now they doubled the prices , support some of the YT clowns and still have a crappy customer service , suddenly they are "top notch" .....very funny 😄 I own various servos from them and was a supporter once but I was treated like a doormat as a paying customer....keep that in mind , boys. 😉

[@CrawlerCanyon]

As long as you keep in mind that they're the OE for scads of re-branders out there, I'll keep AGFRC's customer support (or lack thereof) as a consideration. But with few exceptions, anything RC-related I buy off of Amazon I simply classify as caveat emptor, with little or no CS or im/explicit warranty behind it. I'm buying servos off of Amazon regularly, and realize that every purchase is a gamble-- might work, might not. If I'm out 60 bucks (or more) that's mostly on me. I've killed a combination of HiTec and Savox servos in far greater number than anything from Amazon. Because while I think about it, I haven't killed servos from Amazon.

[@SnarkyRC]

AGFRC have always given me great customer service. It's best to reach their customer service through their Facebook page.

[@ClayFurman]

the servos rating is inch lbs, 1" is 24.5mm. even the little bit you are below that skews your results.

[@CrawlerCanyon]

One inch is 25.4mm, not 24.5mm. And based on the hole position on the horn, all output results are multiplied by 0.925 as torque force is linear, so the adjusted numbers are correct. But the raw numbers are inarguably more applicable, because the only horn I know of with a hole at exactly 1" is the double-sided one from NSDRC. We're all running horns with the hole at 22mm or 24mm from the output, so we're all seeing more force than the 1" numbers. I have a few rigs with 18mm horns, so they're getting a full 1/3 more force.

[@pauls1816]

I gotta know where to get that horn

[@CrawlerCanyon]

I get 'em on Amazon. You can just search for "long servo horn." I got that one in a two-pack from "Dilwe," but they appear to be out of Prime-- so you wouldn't get one until January. Seems to still be available in gold, blue, and other flashy colors.

[@davidhighfill9356]

I think because your fav servos are AGFRC and that they don't have a name. The new build with all the servos should not be named. It should be called The TRX4-10 PORTAL

[@FaithSaraG]

I don't think I need a servo that breaks stuff. I do that just fine on my own.

[@dkmgm2011]

Love all my old Reefs but I've moved on. Homes shv 800 power is hard to beat. I have hundreds of hours on mine and it is amazing 4s. Diamond 4s are great "budget" direct power. Very fast. Don't use cheap horns. Lately, I've been messing with 6s drone esc/batteries in 1/10 crawlers. NHX makes a 6s direct power servo. I've been testing in different rigs for a couple months. Absolutely freak.

[@themountain59]

well...reefs are AGFrc servos 🙄

[@dkmgm2011]

@@themountain59 Cool story bro. Thanks for the update. 😘

[@chriscord6524]

These days there isn’t a wrong hole. And to suggest such a thing could offend someone, who identifies as a wrong hole. Or whatever