Servo spline count.....what to use where...

[Charlie-III]

OK, I didn't find a single thread but bits & pieces here & there.

For "standard sized" servos (Futaba 7955 as an example) (1.57" x 0.79" x 1.50" or for the rest of the world 40mm x 20mm x 38mm), the below is a guide on spline count.

23 splines: KO, Airtronics/Sanwa, JR, ACOMS, Solar, EXI.

24 splines: HiTec, RCD, Apollo (plus some Tower/Hobbico as HiTec makes them)

25 splines: Futaba (newer), Savox, (plus some Tower/Hobbico as Futaba makes them), traxxas 2075 digital waterproof servo, HPI, HobbyKing-BlueBird, some TowerPro [mg995], RC4WD


SOME INFO FROM SERVOCITY (11/3/2013)

Hitec Servo Splines

Futaba Servo Splines


The micro/mini servos are different, thus servos used for shafty dig units, servo digs (for MOA's) and MRC steering is a seperate issue.

If you find a correction, or want to add, feel free to do so.8)

Note: some of this came from here.... RC Groups - View Single Post - expert servo arms

"Servo Database"...... 1st page is so-so, click on the brand you're looking for at the top of the page for more info on that brand... Servo Database - RC Servo Specs and Reviews

if its not already on here, stock Losi LNC pn LOSB0812 is 23 and wraith/axial AS-2 is same as HiTec 24

Good clamping servo arm/horns:

Decent = GH Racing aka Golden Horizons... TowerHobbies.com | AdvancedSearch Results

Great = Robitronics.... Ultra reliable servo arms - Modellbau und Modellautos & Robitronic Machined Aluminum Single Sided Servo Horn (Short) (Grey) (24T-Hitec) [RBOR17021G] | Radios & Accessories - A Main Hobbies

Garbage = Integy (stripped 2 quickly on a HiTec 7950, they also had rubbing issues that tore up a servo.)... Billet Machined Alloy Servo Horn 24T for Hitec Servo (r=20, 24mm) for R/C or RC - Team Integy

Running 2 or more servos off a single RX channel??? May want to look at this... Boosted Servo Extensions

 

[Charlie-III]

Updated some info.

 

[losikid]

do you have any info on the mini/micro's. Ive been looking for some horns for a micro savox

 

[Cordwood]

The only thing I have extra in my notes is HPI servos are 25 spline.

 

[Charlie-III]

do you have any info on the mini/micro's. Ive been looking for some horns for a micro savox

I have some, but not as much since I don't use them. I was thinking of adding a bunch of those as well though.

The supplied link has some micro servo info.

Thanks for looking.8)

 

[Charlie-III]

Updated....

 

[92LILREDYJ]

This should be a sticky, thanks for the info!

 

[Charlie-III]

This should be a sticky, thanks for the info!

Glad it was worth it (also glad you searched & found it)."thumbsup""thumbsup"

I will do the same for smaller servo's at some point.8)

 

[Charlie-III]

Another thread from here with similar, but different, info..... http://www.rccrawler.com/forum/electronics/270123-standard-size-servos-splines-guide.html

8)

 

[Charlie-III]

Based on this.... Aluminum Pro Adjustable Servo Horn Single Arm Futaba/Savox Black looks like at least some RC4WD servos are Futaba/Savox compatible.
Updated 1st post.

 

[Olle P]

Power HD also use 25 teeth.

 

[CPE MT]

Our CYS hi-torque metal gear servos also have 25 teeth.

 

[bob1961]

i'm pretty sure when i bought my hitech servos for my shafty rig with a hitect 225 for dig servo it was the same horn for both my 7955 and 225........bob

....

 

[Evil Genius jr.]

Radiopost uses 25T.

 

[Charlie-III]

Another linked post....will check info & update 1st post...... http://www.rccrawler.com/forum/electronics/270123-standard-size-servos-splines-guide.html

8)

 

[Fink]

Thanks for posting this and keeping it up to date! Has helped me a ton!

Fink

 

[Charlie-III]

Thanks for posting this and keeping it up to date! Has helped me a ton!

Fink

No problem, glad it helped.

Thanks for the feedback.

When I get a chance (along with everything else..... :roll:..... ;-)) I will add smaller servos as well (like used for 2 speed trans, etc.)8)

As I've stated before, feel free to make comments, add info, dispute info, as time goes on.

 

[canadianbacon]

Thanks for the info Charlie, helped me out with the info I needed for Savox servos.

 

[ceedawwg]

Don't see anything on Losi servo's...:ror:

 

[toka100]

Don't see anything on Losi servo's...:ror:

losi should be the same as jr. 23t. same as spectrum servos.