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HeliHobby . Ron’s HeliProz South . Century Helicopter

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Main Discussion > Understanding one-way bearings
 
 
Mitz
Senior Heliman
Location: Crystal Lake, IL

I tried the grease!

The grease in my Evo 50 one-way is wonderful. I immediatly
noticed an improvement in performance and the rock-solid
proof was the extended time it took to spool down after shut-down.


Dick Sceadu or Don't
10-14-2004 Over year old.
 
 
Alistair
Key Veteran
Location: no where land

Quote 
Understanding one-way bearings


this is easy..... the go one way

squigle
10-15-2004 Over year old.
 
 
mrNoodles
rrProfessor
Location: Borlänge, Sweden

And breaks after X hours of use



/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.
10-15-2004 Over year old.
HOMEPAGE  
 
 
Alistair
Key Veteran
Location: no where land

yep, see...... easy

squigle
10-15-2004 Over year old.
 
 
Crusty Commie
Senior Heliman
Location: Wales

Mitz is the evo one way different to the original sceadu?, looking at my one-way there is no way to do the mod without modifying the main gear...thx

I am dsylexia of borg..resistance is fruity...your arse will be laminated
10-15-2004 Over year old.
 
 
mrNoodles
rrProfessor
Location: Borlänge, Sweden

The oneway housing on the EVO is plastic.
You can sand down any eventual sharp edges and apply grease on the outside of the bearing.
But I guess plastic is doing less harm to the bearing, and less force being applied on it due to smaller engines.

Wouldnt hurt to try the mod though.

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.
10-15-2004 Over year old.
HOMEPAGE  
 
 
Crusty Commie
Senior Heliman
Location: Wales

Noodles, I still cant see how, the bearing is a tight fit, greasing the outside would do nothing in this case

I am dsylexia of borg..resistance is fruity...your arse will be laminated
10-15-2004 Over year old.
 
 
smegs
Veteran
Location: Hacienda Heights, CA

Awesome article that's how you write a awesome article.
11-18-2004 Over year old.
 
 
hepsibar
Senior Heliman
Location: Lancaster, Lancashire, UK

Raptor 60/90 bearing adjustment, gear mesh issues

Excellent explanation! Thankyou for this info. Very very interesting and well researched.

A question though for raptor 60/90 owners. If I increase the internal diameter of the bushes on the 60 hub above and below the bearing to allow some float/ free play of the bearing will this not affect the gear mesh of main gear & pinion and tail take off gears?

Am I barking up the wrong tree? I realise tolerances in your diagrams are greatly exagerated but approx how much play is required to free up my hub - do I ream it out a little at a time till it does not lock?

From the diagram it seems that the freya bearing has flats which allow freeplay in the hub without allowing the bearing to spin unlike the raptor bearing which apears to be round.





Empty Coffee Cup
11-18-2004 Over year old.
 
 
hepsibar
Senior Heliman
Location: Lancaster, Lancashire, UK

The point I was trying to make is that from what I perceived Augusto's post on the free hub auto bearing is that the bearing needs to be able to float around the shaft in order for it to engage/ disingage smoothly.

The bushes on the raptor hub are there to ensure correct gear mesh but because of this the auto bearing cannot float about the main shaft therefore is the answer to remove a tiny amount off the bushes thereby allowing a small amount of free play without adversly affecting gear mesh? - Reduced lock up problems with increased gear wear!!!

Perhaps someone knows of a sprague clutch which may fit the raptor with or without modification.

Or maybe the raptor auto hub is a lost cause.

Empty Coffee Cup
11-18-2004 Over year old.
 
 
rstacy
Key Veteran
Location: Rochester, NY

Augusto,
I just did the bearing mod to my KSJ start shaft.
It did the trick!

Thanks!
Ray
06-21-2005 Over year old.
HOMEPAGE  
 
 
SubSailor
Veteran
Location: Austin, TX.

Good info, wanted to bump this.

Fromeco Field Rep.
A day without sunshine is, well.., alot like night time.
04-11-2006 Over year old.
 
 
MrT
New Heliman
Location: Dawson Creek, BC, Canada

One way bearings

Does anyone know how the one-way bearings work on the Suprex-3D Pro 450 is installed? I had a major crash and dismantled my Heli before making a detailed diagram of the gears.



Thanks in advance?

Is anyone else trying to fly one of these?
09-02-2007 06:17 AM
 
 
CitationX
Senior Heliman
Location: Danville, IN

Need Help Understanding 1 Small Issue

Augusto did a fantastic job explaining the one-way bearing theory. The 1-way bearing in my KSJ wand has begun to slip over the last few weeks and therefore the modification is imminent. I would like a bit of clarification on 1 issue Augusto made. It is in regards to this statement:

Quote 
Re assemble the unit and remember that since now there's nothing to prevent the wand to be pushed inwards you need to supply some spacer such as a few washer in front ot the starter motor shaft the so it will hold the shaft in place by pushing it from behind.

Will someone give me some help on understanding this point? I was looking at my KSJ trying to figure this out but I am not seeing it.

Thanks for any help guys.
09-04-2007 03:34 AM
 
 
PietervA
Veteran
Location: New Zealand

Undo the bolts in the conical connector, thus releasing both the hex starter shaft and the stubby one-way shaft. Heat up the wand piece with the two bearings, and allow the front one to drop out. Make sure the back one remains in place as the piece cools.

Now replace the stubby shaft, screw the wand base onto the part mounted on the starter motor shaft, let the stubby shaft rest up against the front of the starter motor shaft, and replace the conical piece on the stubby shaft. Tighten the caphead bolt, making sure that the conical piece does not rub against the wand base when you push down on it.

Now replace the hex wand and voilá, you get another year or more out of your KSJ unit.
09-04-2007 08:29 AM
 
 
CitationX
Senior Heliman
Location: Danville, IN

Got It!

Sounds good. I have made the necessary modifications and will give it a shot tomorrow on a fresh charge.

Thanks for the help!
09-05-2007 03:04 AM
 
 
3 pages [ <<    <     1      2     ( 3 )    >    >> ]21037 viewsPOST REPLY
MTA Hobbies . Model Rectifier Corp . PowerHelis

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Main Discussion > Understanding one-way bearings
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