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Advantage Hobby . Revolution Models . CarbonXtreme

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Antiques or Out of Business > Tsk Clutch Bearing
 
 
Tskrotorhead
Senior Heliman
Location: Washington

Ok guys, how often does the bearing in the clutch on your TSK go bad?

Mine cost me a beautiful day of flying. This is the 4th time that I've had to replace it. And of all the spare parts that I have I don't have another clutch. And I had just changed this one 2 months ago. Now it is true that I had a couple of flooded starts but I didn't try to force it. Once I felt that it was flooded, I would stop, pull the plug and clear it.

Anybody know the Boca Bearing part number for this bearing? I think that I am just going to modify the clutch so that I can change the bearing myself. BTW, this is for the MyStar 46.
03-23-2002 Over year old.
HOMEPAGE  
 
 
Blair
Key Veteran
Location: Republic of Canuckistan

The Mystar 46 is the only TSK that had this problem. It is (was?) very common. There are two mods that you can do.

1) Machine the lip off the bottom of the clutch so the bearing can be easily pressed out and replaced (doesn't fix the problem).

2) Go to a solid clutch. A guy in my club has just gone to this. I don't know what he did as I haven't seen it yet, but he claims it works beautifully.

Send me your email and I'll pass you on to him.

Blair (seen many guys lose a good days flying because of this problem).
03-23-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

Clutch bearing.....

Hmmmmm which bearing?The one in the bell or the actual one-way bearing in the clutch?I've never actually had to replace either or and i fly year round!You do know you are supposed to grease the one-way bearing, don't you?Have you?What grease are you using?Yes grease,not oil.I use a automotive-type Valvoline semi synthetic dura-blend grease.I do believe you can remove that bearing with a bit of heat.O.k update here.For the removal of the one way bearing.Heat the clutch in the oven at about 350f or better,it's gonna smoke good!Tell your wife first!!I took a old wood board and drilled a 3/4 inch whole in it.After the piece has heated up good use a pot holder and turn the clutch upside down over the hole.Then take an old main shaft and put it in the hole then drive it out with a few GOOD raps on it.If it doesn't come out reheat it again at a slightly higher temp.Make sure you have the clutch with the mounting nub, I call it facing up towards you and the open end down.Don'y use a sledge hammer either, for all you overdoers!!!Oh by the way, I did it just now so that i could share the experience with you guys,hahhaha.I still never had a clutch bearing fail before.After you star your heli, look at the hex start shaft and see if it is spinning with the motor after you disingage the start adapter....It must spin.The bearing was only designed to allow you to remove the start adapter without it spinning for a moment, then it begins to spin afterwards.
03-23-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

Clutch bearing...

I think the part number for boca is hf0812.It is a 8x14x12 mm one way clutch.It's no a cheap part either.It lists for $24.95.I'm double checking my measurements and looking elsewhere also.
03-24-2002 Over year old.
 
 
Steve Campbell
Elite Veteran
Location: Baton Rouge, LA

The MyStar 46 uses the same size torrington bearing in the clutch as does the 30. The higher compression of a .46 puts a strain on it; it doesn't take much to lunch one. I had one fail, but I replaced it with a GENUINE TSK-supplied bearing (as opposed the cheap knock-offs that were supplied with my kit, which was not packed by TSK) and flew that ship another 2.5 years without a failure.

Like Blair said, this bearing failure is all too common on the 46. If you run your engine dry at the end of each flying session, leave the after-run oil in the bottle, and be careful not to flood it during the next start, you shouldn't have a problem.

Steve
03-24-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

OIC.

I thought it was the other way around.I have a MYSTAR 60 and never had a failure.I thought the torrinton bearing was the same between the 46 and the 60.Well it should have been, i guess.Have you actually seen a MYSTAR 60 clutch?
03-24-2002 Over year old.
 
 
Tskrotorhead
Senior Heliman
Location: Washington

Thanks guys for your thoughts on the clutch bearing. I was feeling like it was just happening to me.

Blair, I sent you an email. I am interested in the solid clutch.

Steve, so if the 46 puts a strain on the bearing the 50 is putting enven more strain on it. I'm really interested in the solid clutch.

Safe_Cracker, as you can tell the "clutch bearing" failure is a problem with the 46. Since you fly the 60 it has a beefier bearing so I can see why you haven't had a "clutch bearing" failure. Oh BTW, get that clutch bell yet?
03-24-2002 Over year old.
HOMEPAGE  
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

NO.

No not yet, but did you see how to remove the bearing? What are the dimensions on the 46 bearing in mm ?? How much different is the 46 from the 60? I thought the 46 was identical to the 60 and the 30 was in a different boat?What's the difference with the solid unit??
03-24-2002 Over year old.
 
 
Tskrotorhead
Senior Heliman
Location: Washington

Ok relax Safe_Cracker. Boy, did someone get up on the left side of the bed or what?

The 46 bearing is 10 mm OD and the 60 bearing is 14 mm OD. And yes I have seen a MyStar 60. I have 1 1/2 MyStar 60. Thank you for your explaination on how to remove the bearing. And I don't know anything about the solid clutch but I want one for the 46.

Anyway, I am going to get this bearing changed and see if I can get a flight in tomorrow.

Paul
03-24-2002 Over year old.
HOMEPAGE  
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

I am relaxed :O)~

I was justa asking questions.What ya think about the deal with the gs parts?It includes the engine too!Wow the bearing in the 46 is that much smaller? How much different is the clutch bell?I would have to find a way to use a different clutch system.Well if you have a 60, then why don't you fly it? I wouldn't even bother with a 46.Give me a full mimension and i'll give you a boca part #.Polo........
03-24-2002 Over year old.
 
 
Tskrotorhead
Senior Heliman
Location: Washington

Well POLO, if I had the $$ I would buy the gs parts but like I told you in one of my emails, I have enough spare parts to complete it.

The 60 clutch bell has an OD of 53.25 mm and the 46 is 44.75 mm. Just a little bit smaller!! I don't have an engine in the 60 yet, that's why I've been selling some of the parts. I have to have it flying by the time summer gets here. But I really like the 46 too. That may change when I get the 60 flying.

Thanks for the research on the Boca bearing but I bought 2 today. Drove a 120 mile roundtrip just to pick 'em up. The things we do for our toys!! I had better get busy on changing that bearing now. Email me when you get the clutch bell. I put a little something extra in the package.
03-24-2002 Over year old.
HOMEPAGE  
 
 
Steve Campbell
Elite Veteran
Location: Baton Rouge, LA

TSKRotorhead,

Remember that if you go to a solid clutch, you'll need a torrington bearing in the loop somewhere. The cat's ass would be that 6mm start adapter with the torrington bearing in it that they sold with the BlackStar and MyStar gassers. I had one, and let Silas Kwok talk me out of it. Big dummy, me...

I haven't played with an OS .50 yet, but I would think it has at least as much, if not more, compression than a .46.

Steve
03-24-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

Maybe...

All depends if the OS50 is abc or ringed.The torrington bearings are not cheap!!For mine it would be $24.95 and that's at boca.I do have the part number for you MYSTAR 60 flyers.It is an 8X12X14mm 1way clutch as they call it part #HFO812 at bocahttp://www.bocabearings.com/cart/details.cfm?ItemID=2056&category=45&return=http://www.bocabearings.com/inchMetricSearch2.cfm



Check it out.....POlO............
03-24-2002 Over year old.
 
 
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Antiques or Out of Business > Tsk Clutch Bearing
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