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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Understanding one-way bearings
10-14-2004 09:39 PM  14 years ago
Mitz

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Crystal Lake, IL

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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
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10-15-2004 08:26 AM  14 years ago
Alistair

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no where land

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Understanding one-way bearings
this is easy..... the go one way
squigle
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10-15-2004 08:29 AM  14 years ago
mrNoodles

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Borlänge, Sweden

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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.
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10-15-2004 08:30 AM  14 years ago
Alistair

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no where land

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yep, see...... easysquigle
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10-15-2004 08:39 AM  14 years ago
Crusty Commie

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Wales

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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...thxI am dsylexia of borg..resistance is fruity...your arse will be laminated
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10-15-2004 08:48 AM  14 years ago
mrNoodles

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Borlänge, Sweden

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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.
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10-15-2004 09:04 AM  14 years ago
Crusty Commie

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Wales

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Noodles, I still cant see how, the bearing is a tight fit, greasing the outside would do nothing in this caseI am dsylexia of borg..resistance is fruity...your arse will be laminated
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11-18-2004 09:01 PM  14 years ago
smegs

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Hacienda Heights, CA

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Awesome article that's how you write a awesome article.
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11-18-2004 09:44 PM  14 years ago
hepsibar

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Perth WA

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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
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11-18-2004 11:25 PM  14 years ago
hepsibar

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Perth WA

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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
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06-21-2005 07:32 PM  14 years ago
rstacy

rrElite Veteran

Rochester, NY

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

Thanks!
Ray
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04-11-2006 01:32 PM  13 years ago
SubSailor

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Austin, TX.

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Good info, wanted to bump this.Fromeco Field Rep.
A day without sunshine is, well.., alot like night time.
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09-02-2007 06:17 AM  11 years ago
MrT

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Dawson Creek, BC, Canada

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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?
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09-04-2007 03:34 AM  11 years ago
CitationX

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Danville, IN

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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:
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.
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09-04-2007 08:29 AM  11 years ago
PietervA

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New Zealand

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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.
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09-05-2007 03:04 AM  11 years ago
CitationX

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Danville, IN

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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!
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01-16-2010 08:17 PM  9 years ago
ssrobzoom

rrKey Veteran

Tn

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Anyone know where I can get a replacement one-way bearing for the KSJ starter wand?
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01-16-2010 08:24 PM  9 years ago
dkshema

rrMaster

Cedar Rapids, IA

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Anyone know where I can get a replacement one-way bearing for the KSJ starter wand?
I tried that several years ago. Then I bought the Mavrikk wand instead, it has outlasted the KSJ by about 3X now.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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01-16-2010 09:12 PM  9 years ago
ShuRugal

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Killeen, TX

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nice gravedigAMA 700159
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01-16-2010 11:00 PM  9 years ago
CitationX

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Danville, IN

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Sullivan Wand
Also give some consideration to the Sullivan Starter Wand as well. Outlasted my KSJ hands down.
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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Understanding one-way bearings
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