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  Item found in the following categories;
> Hardware & accessories. > Spinner/Adapter
> Electric Motors > Motor Parts

  RATED:

3mm Prop Saver w/ Adapter & 3 bands

3mm Prop Saver w/ Adapter & 3 bands


An excellent device for saving your propellers on those bumpy landings or dodgy take-offs.
The prop saver has a 3mm size shaft, and comes with a collet to fit most propellers.
it also has 3 rubber bands.
 
Note: Color may vary from the photo.

PRODUCT ID: 3MPRPSVR

20g Back warehouse: 0 -9 $1.49
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 Customer rated
5331
crowns
  
 
Total of 17 discussions.
scarborofun  56 points - 12/10/2012
 
There are more dimensions than the shaft size. Would be interesting to know what they are. (HK, why don't you show the dimensions and which metal they are made off? Also, I believe the screws are Philips, they should be hex.) How long has it been on back order?
 Viper_one3 10 points
It is made of aluminum. One side measuring 7mm in diameter and the other side is 5.5mm. And the screws are M3.
BEST ANSWER CREDIT AWARDED
 scarborofun 56 points
Thanks. I just have to know if they fit the props, don't I? Wouldn't be so hard to put two dimensions on. Now we only need them to be on stock....
SAR Man  1 points - 11/29/2012
 
Would this be the saver for the AX-2306N-2000? There is not a shaft size listed for this motor.
 tommy2toes 2160 points
yes this is the exact one you will need. hope it helped credit the answer if it does thanks, tommy
BEST ANSWER CREDIT AWARDED
xan.g33k  106 points - 9/14/2012
 
why 3mm doesn't come in 10 piece per bag?
 mena142 746 points
It does: www.link
 Brian 36 points
You can also use garden hose gaskets from your local hardware store as replacement bands.
 tommy2toes 2160 points
they are just out of stock for that size bag.
Flying Fiz  13 points - 7/16/2012
 
Hi,

I'm new to planes, I've been a heli only guy for 3 years. I thought I might get a few of these for my mini and FMS 800mm warplanes, but I cant figure out how these work. Can someone quickly explain thanks?
 Aragorn 51 points
You put the prop saver with screws to the motor shaft, then put the propeller with the prop saver rings. Thus, if the propeller hits the ground, you minimize damage to the propeller and the motor shaft. Choose the right prop for your engine saver (2mm, 3mm, 3.17mm, 4mm, etc ...). Luck!
 thibfighter 11 points
Hi, you simply put the adapter on the motor's shaft, then you turn the screws so that it won't move away from the shaft. Then, you place the prop on this adapter and you "fix" it with a rubber ban (hold on the screws). Hope I helped you !
 Ltunited 8 points
These work by holding the propeller onto the motor only with the rubber band. Thus when the prop hits the ground, the rubber band allows it to seperate from the motor and rotate until it's parallel with the ground. As you may have already understood it prevents the prop from bending and breaking by allowing it to rotate. Hope this helps.
 metalguy 45 points
This one also comes with an adapter to fit APC props. I use it on my HK microStuka, and it works like a champ.
 Krille 5 points
Also, if you are having trouble fitting this on the motor shaft: I noticed that there is a bit of paint on the inside of these, making them more like 2.8-2.9mm = won't fit the motor shaft. I had to drill them out with a 3mm drill bit to make everything fit.
 tommy2toes 2160 points
put the two screws in the prop saver. then slide it on the shaft. then add your prop sitting on top. now hook the rubber ring on one screw and pull it across the prop to the other screw and hook it on that screw. thats it your done . if you have a strong fast motor somtime you can put on two rubber rings to really hold your prop better. credit the best answers thanks ,tommy
 tommy2toes 2160 points
all those good answers someone should get the 10cent credit spending time to help? please remember to credit those who help you. thanks ,tommy
smartguy  278 points - 3/9/2012
 
I bought this, but i have a problem i can not tighten the screw on one of the holes the screw dont enter on the hole
What i shoud do ? I will give a reward
 mena142 746 points
Either the hole or the screw could have some metal protuberance that don't let it screw in, give both of them and if you find any file them down taking care not to damage the threads. Try to find similar screws and try screwing those in. Take the prop saver to a hardware store and try out diferent sizes of screws :P... Also, the screw might be the diameter, but the threads might be different. Good luck!
 Rodrigo Lobato de 1 points
Put a screw thinner or open a little hole with a drill.
 SigiK 214 points
With a file chamfer the end of the screw
 OldFartFlyer 1323 points
Be very careful about this problem. Using a different screw might lead to future problems for a number of reasons.
You might accidentally cut a different thread which will not suit your supplied screws. Since the unit needs to balance on the shaft, you must use identical screws.
A common solution is to remove some material from the leading threads of the screw which will then penetrate deeper into the hole before "biting". But if you do this, you will need to do the same to the other.
Another solution is to screw in from the other end. That means from the shaft housing outwards. But this would require a grub screw and you might not be able to match the thread.
If you have a set of taps or thread cleaners, you can pass one through to clean up the thread. Alternatively, you could tap new threads to match two new screws that you have in your spares. But this solution demands that you do have an engineering tapping set.
It might be cheaper to purchase another.
 tommy2toes 2160 points
you can go buy a metric fine tread tap and die from any hardware store fairly cheap then you can re tap the hole properly simply a 10 dollar kit.then youll have it to fix or create anyhole you ever need!
SupercubDSM  9 points - 2/29/2012
 
Does this fit 8x4dd 9x5dd and 10x6dd props?
 SigiK 214 points
It fits 8x4 & 9x5 GWS. Some brands have different diameter holes, which you need to drill out for a fit.
 dolino 38 points
Or buy prop with hole adapter
 SupercubDSM 9 points
Thank you. I guess the easier question would be, Does it have a 7mm adapter?
 mena142 746 points
I use them with GWS 8X4 and 9x5. The props dont have to be a perdfect fit because the point of a prop saver is them to slide off in the event of a crash.
 SigiK 214 points
It has a 7mm adapter. The O-rings are of poor quality. If you leave them on the shaft when not in use, they will break after a few days. Suggest to replace them with Silicon O-rings.
BEST ANSWER CREDIT AWARDED
Juanes  45 points - 1/30/2012
 
Does it fit with turnigy 28 30???
 ANDY in c.a.p 348 points
yes it will credit pleas
 mena142 746 points
Si, ese motor tiene un eje de 3mm, y este prop saver es de 3mm.
 Coombs 15 points
Yes, as the spanish gentleman above stated, the 28 30 has a 3mm shaft. So it will work just fine, Also check buddy codes, I happen to know this item is there *Wink*
 dandan 14 points
Yes, it will fit. But I had to take some fine sand paper to the shaft of my 3mm motor due to the snug fit of the prop saver. Also, I just bought some of these and the rubber bands kept snapping on me after simple s***ling up in the shop… I don’t care about saving props* I just wanted a shaft adaptor so I had to use small zip-ties to fasten my props to the screws.
 smartguy 278 points
Yes, it will fit on 28-30 !!!
If you like my information let get me rewarded Please
 Robert 26 points
yes, it will fit
Allison  1368 points - 11/21/2011
 
Hi you guys I see below that I should not use the 3mm on a 3.17mm shaft. So where can I get a 3.17mm adapter?
 Kellyann 16240 points
Allison Hobby Kings sell the adapter you want. Here is the PRODUCT ID: 317MPRPSVR I hope this helps
BEST ANSWER CREDIT AWARDED
 PR33M1UM 1 points
obviously. When choosing a prop saver, you need one that is the same size or LARGER than the shaft on the motor you're intending to use it on.
 Kellyann 16240 points
Joe do you think larger is a good idea. I have been ably to drill them out on a good drill press. IE: 3mm to 1/8 inch. I will say a good drill and press is very important. As you can see from other replies you can lose center if you use a hand drill.
 Hristo 10 points
if you want you can modify it just use a 3,2 milimeter scrul head to make the how biger but befor that remouv the scruls and secur it furmly anth this mod wiw destroy your worenty
pete  3 points - 10/25/2011
 
Will this prop saver fit a APC 10x5-E propeller with a Turnigy 3632 BM 1500KV motor. Thanks
 AVIADO-FLORIPA 1 points
It will work yes. but not the best! And remember to remove the O-ring after each use. The best way is you get a really Propeller Adapter like this: www.link
 OldFartFlyer 1323 points
It will suffice.
 FPVking 374 points
AVIADO-FLORIPA, but "real" prop adapter wont save your prop *)
 FREDERICO 1 points
este produto faz reduzir as perdas de hélices em acidentes.
 Olivier 15 points
Hello, It depends on the propeller, i have a TGS Sport 8x6E which is too big for this prop saver. The O-ring must be placed with a small screw driver and it doesn't resist to the motor power. Masterscrew propeller are easily to use with this prop saver.
 kapil 9 points
no, the motor has a 4mm shatf therefore look for a 4mm prop saver. the shaft on the motor is too big for the 3mm prop saver. it wont go fit.
 Ivan 6 points
No it will not work, because this motor has shaft diameter of 4mm, and if you try to drill out the hole on the prop saver you can miss center and that will give you a large amount of vibrations!
 Guilherme Fernando 13 points
Serve para motor 2822 ??
Ebiker  166 points - 9/20/2011
 
This saver and also adapter are just a fraction larger to fit on TGY Slow Fly Prop 8*3.8SF which I believe it should fit fine. Do I need to hammer it in or something? :-)
 OldFartFlyer 1323 points
Take care. Your shaft might be 1/8 inch ie 3.187 mm. You might need different size. recommend you ckeck your specs.
 Ebiker 166 points
Motor shaft fits fine, it's the saver not fitting the prop right.
 CLEOMARA 12 points
ja vi perece ser bom...
 dubles 14 points
Have you tried turning the prop saver around. The other side is a different size. I also got a little adapter plate with mine which you can put on one of the sides to fit an even larger prop.
 Ebiker 166 points
The saver and it's adapter simply don't fit the TGY Slow Fly Prop 8*3.8SF . I think it should. I had to shave about 0.4mm of the adapter so it fits in the prop.
 PR33M1UM 1 points
lol, i try not to hammer anything on my planes.
 SigiK 214 points
Better to drill out the prop to make it fit. But you have to use a drill press and make sure to centre it properly before drilling. A hand drill will not do.
kapil  9 points - 8/5/2011
 
i have a motor which has a 3mm shaft, i got some props which fits perfectly on the motor but if i start the motor the props will just spin up( thats normal), will this help to keep the props in place?
 bobby73 48 points
yes you need a prop saver to fix the prop or a locknut
 OldFartFlyer 1323 points
Yes to prop saver. But you can lock your prop by fitting a locking prop washer, then your prop then your prop nut
 Chris 12 points
Prop Saver is used if your motor doesnt have a threaded shaft . It will go on 2 ways depending on the hub size of your prop . Once you know which hub the prop will fit over face it outward slide it on the shaft and tighten the screws . Next the prop goes on and then the oring hooks around 1 of the screws around the front face of the prop and around the other screw . Its a fairly hard pull but very secure once on . I actually use 5/16 surgical tube cut into rings instead of the orings .
 Charles 27 points
yes, the rubber is very strong!!
 Toh1652 10 points
Yes, Prop saver will save your prob!
 Milind 24 points
No worries! Its okay, the rubber grip is very strong!
 Bonified Wingnu 16 points
Tighten the two screws that hold the O ring, They hold the prop saver on the shaft.
 Calvin 2 points
yess this will keep your prop from spinning up.
 Martincr 5 points
Yes this will hold your props in place. Get some replacement rubbers so you have them at hand for the case tp lose them after hard landings. www.link
makind  10 points - 7/17/2011
 
Ordered more than month ago. Any info about restocking?
 Milind 24 points
Never trust the ETA or Customer Support! Even I am waiting for some items including this to get back in stock, but from past 3 months they are saying it'll be restocked in 3 weeks! LOL!
 makind 10 points
so you have this item in your paid order for 3 months?
 OldFartFlyer 1323 points
This kind of thing has happened to me, as well. The ETA indicates supply of, say, two weeks but the same message remains for many many weeks. For one item reported as ETA one month, I paid and waited six months before cancelling my order after CS informed me there was no likelihood of supply for another three months. I lost my postage.

I have written to HK Customer Services appealing for quality ETA information to enable improved customer ordering decisions. A quality customer service req
 makind 10 points
I still waiting for my plane (20days to backorder, but im waiting 40days now) as soon my plane will be restocked and shipped i will cancel this item from my order.
 christiano 78 points
7 to 30 days
 catalinapby 6 points
instead of ordering bk stock, sign up for the notification of restock. If you have a bk item it holds up the whole order.
 krekrek 19 points
Normally stocks renew every 30 days. Put it on your list and check the option to be prompted.
 makind 10 points
I added it and paied for it 2months ago. but still no sign of it
 Kellyann 16240 points
Sir they are in stock now. I hope this helps
BoBBys  1 points - 6/11/2011
 
Stupid question... (when it says 3mm). Will it fit on a 3.17 shaft?
 Adam_Max 18 points
you can gently drill the adapter
 christiano 78 points
if you drill you can lose the center, buy a 3.17mm prop saver and be happy
BEST ANSWER CREDIT AWARDED
 OldFartFlyer 1323 points
Remember 3.17mm is 1/8 inch. 3mm is 3mm.
 Cassio 4 points
No. It fits exactly 3mm, better buy a 3.17mm prop saver.
 MikeyFlys 67 points
Removing answered question.
 Ivan 6 points
No, if you use drill to increase hole diameter you can miss little and the hole is out of center, and that can give you some hard vibrations in flight!
nguyentran  21 points - 6/3/2011
 
Do you know what screws i can purchase to use with this adapter? I have a spare adapter without screws.
 floydbh 95 points
I believe that M3 will fit. but if you have a spare, you can bring the piece on the shop to measure that
 sacred 29 points
Try to buy hardened screws. Those provided with prop saver are made from soft steel.
 christiano 78 points
buy a new prop saver and be happy
 OldFartFlyer 1323 points
At the price, just buy another. If not, get any spare screws and use. Not worth buying more screws!
 Ivan 6 points
M3x14mm
Pedro Antonio  23 points - 5/28/2011
 
Você sabe se esses prop existem proteções para o eixo 4 milímetros como Turnigy 3542, por exemplo?
 _JeaN_ 110 points
Há um par de protetores de prop 4mm, tente procurar ("pesquisa rápida" no lado esquerdo da página) de 4mm e você vai encontrá-los. (não posso postar links aqui:)
BEST ANSWER CREDIT AWARDED
 OldFartFlyer 1323 points
All the best with the product. I'm pleased with mine.
 MikeyFlys 67 points
Removing answered question.
Hoschi09  12 points - 8/24/2010
 
What kind of screw thread is inside and what diameter the rubber bands have (to order spares)?
 aditya gupta 58 points
i think normal elastic bands work well
 AZHER 8 points
2mm screw thread with matching screw pitch, the OD of the ring is 16mm
Seb  29 points -
 
Do you know if these prop savers exist for 4mm shaft like Turnigy 3542 for instance?
 Beaufighter 1808 points
There are a couple propsavers for 4mm, try searching ("quick search" on left side of page) for 4mm and you'll find them. (cannot post links here:)
 Seb 29 points
Do you think they would be suitable for a Turnigy 3542 motor. I have just been advised not to use prop savers with powerful motors.
What do you think?
 Beaufighter 1808 points
I wouldn't used it for such a large motor. When your motor produce high torque, the o-ring may snap. Propsaver is good thing on small models, where you may not have landing gear, or the plane is "crash resistant", it will reduce the cost of broken props(and motors)... On larger planes a crash is often more expensive than just the prop, so I'd rather not crash:)
 martin555 31 points
good for 300 gramm foam plane, but make sure u use 2 bands.
Customer Reviews
Overall Rating
Tim King
likes
ValueUNRATED
QualityUNRATED
12 thumbs up!
Like other reviewers, I am pleased with the machine work of this adapter. Fits the motor shaft well, and the ability to use it for 3 different prop hub sizes (5.5mm 7.0mm and 9.5mm) will save some reaming of props. Mine was in balance also, and runs true! I will be adding a handful more to my next order!


1 comment. Reply..

Overall Rating
Claire Gray
likes
ValueUNRATED
QualityUNRATED
5 thumbs up!

Great prop saver, much better than the cheaper ones UH sells.

This one actually fits props, go for this one instead.

5 out of 5.


No comments. Reply..

Overall Rating
Mark
likes
ValueUNRATED
QualityUNRATED
4 thumbs up!
Just received this recently and was disappointed to find out that the version I received was black in colour instead of blue(a minor thing)and it did NOT come with the pictured socket head screws.I got crappy phillips screws instead.I originally bought this version because it was suppose to come with socket head screws.Come on Hobby City.This is false advertising at its worst.


No comments. Reply..

Create an account
Overall Rating
Xantos
42 likes
ValueUNRATED
QualityUNRATED
4 thumbs up!
Quality is good, only the screw thread could be better (diameter to big for screw)

Gute Qualität, jedoch ist der Durchmesser des Schraubengewinde etwas zu groß wodurch die Schrauben wackeln


No comments. Reply..

Overall Rating
Ej
likes
ValueUNRATED
QualityUNRATED
3 thumbs up!
...but it is a nicely machined and finished piece that does it's job just as it is supposed to. Have a few and will purchase more when needed.


1 comment. Reply..

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