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Old 09-01-2002, 06:20 PM   #2596
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Quote:
Originally posted by stefan
Once you got the two spur gears off, you'll see the damage with your bare eyes (if it's as bad already than mine)
The one-way bearing wore a groove in the shaft so bad, that I couldn't get it off anymore.

Try Castle Hobbies (RC Imports), they are the importer off Kawahara. They usually have spare parts.
FYI stefan. Castle Hobbies and RC Imports are 2 separate entities. Right now you'll be lucky to get anything out of Castle Hobbies..............it's sad.......
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Old 09-01-2002, 09:10 PM   #2597
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Default Guys,

I was lucky and got the last shaft that the local shop had in stock.

They told me that they probably wouldn't get any more.

I'm looking for a 6mm drill blan , 120 mm long.\

The shaft has only two holes and one flat spot, shouldn't be too hard.
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Old 09-01-2002, 11:33 PM   #2598
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Default Re: Guys,

Quote:
Originally posted by stefan
I was lucky and got the last shaft that the local shop had in stock.

They told me that they probably wouldn't get any more.

I'm looking for a 6mm drill blan , 120 mm long.\

The shaft has only two holes and one flat spot, shouldn't be too hard.
SO in other words, I need to put the stock 2 speed back on.
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Old 09-02-2002, 01:35 AM   #2599
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what about a titanium one? got a source in the UK
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Old 09-02-2002, 06:18 AM   #2600
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I'd go for titanium, if the cost was reasonable. You got a source?
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Old 09-02-2002, 07:31 AM   #2601
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yep i have in uk will get onto it
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Old 09-02-2002, 07:47 AM   #2602
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Default NO TITANIUM

I had that idea as well, but I talked to a master toolmaker and he told me that against public believe, Titanium is a rather soft metal. Very high density but not very hard surface.

You can use the original shaft if you drill a hole for the second drive pin into that flat area.

The best material will be a HSS drill blank with a rockwell hardness of over 60.
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Old 09-02-2002, 09:21 AM   #2603
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Old 09-02-2002, 11:47 AM   #2604
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Titanium is a rather soft metal. Very high density but not very hard surface.

Interesting about the titanium. I did not know that. So why do people make titanium shafts for these cars if they won't last? I realize the weight reduction, but if I have to replace a $40 shaft every 2 months, that's not worth it to me.

You can use the original shaft if you drill a hole for the second drive pin into that flat area.

I'll have to look into that.

I pulled the tranny apart today. I don't think my shaft has worn down. I can't feel any deformity (like a ridge) where the bearing rode. I measured the shaft and got 4.997mm all the way down (even where the bearing rode). The bearing race is considerably worn though. I got 5.18mm for the inside race. I wouldn't think a 5mm bearing would have that much slop in it. So I guess I'll try to get the bearing out and replace it. It appears to be a 5x11x4mm, but I'll double check when (if) I can get it out. I'm going to try to heat it up in the oven like you do engine cases.
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Old 09-02-2002, 03:28 PM   #2605
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measure again, it should be a 6mm shaft, not 5mm
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Old 09-02-2002, 03:30 PM   #2606
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oh, and btw, the shaft is wearing out where you 1st gear one-way rides.
If you second gear housing wobbles, it's just that cheap bearing. Replace it and it'll be ok.

Maybe my engines got too much power for that tranny, or maybe my first shaft wasn't hardened correctly.

I'll see how the new one does.
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Old 09-02-2002, 04:26 PM   #2607
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Quote:
Originally posted by stefan
oh, and btw, the shaft is wearing out where you 1st gear one-way rides.
If you second gear housing wobbles, it's just that cheap bearing. Replace it and it'll be ok.

Maybe my engines got too much power for that tranny, or maybe my first shaft wasn't hardened correctly.

I'll see how the new one does.
What kind of engine are you using?? I am starting to worry about my K shaft! I am currently running Novarossi RS12T S5, and the K 2speed has been through like 5 gallons of fuel from the RBX12T 5 port and both of these engines are very powerful!
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Old 09-02-2002, 04:42 PM   #2608
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Quote:
Originally posted by stefan
measure again, it should be a 6mm shaft, not 5mm
Every damn thing I have is broken. You're right. I measured it again, my digital calipers have it at 5mm, my dial calipers have it at 6mm. So what is the correct size of that damn bearing?
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Old 09-02-2002, 06:39 PM   #2609
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The bearing size is 6x13mm.

AH 10, I'm running a tuned RB 5 port and a tuned MT12.

Sorry, the pics of my car will have to wait until tomorrow, the USB cable for the camera is in my office
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Old 09-02-2002, 07:29 PM   #2610
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Tommy

Titanium has poor surface wear properties. It is strong for the weight but not good on wear. This is the reason I don't buy Ti hinge pins and ball ends. A 2 speed shaft where the 1-way bearing rides on is a no no.
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