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Old 02-20-2007, 11:34 PM   #1141
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Originally Posted by schurcr
It sure is one tight fit.
yet so so very worth it.
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Old 02-23-2007, 08:52 AM   #1142
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Couple hour turn around for email. Thanks Bruce.
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Old 02-23-2007, 09:50 AM   #1143
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I noticed on the speedmerchant website, Bruce recommends purchasing a prop reamer to use on the front rims so one can widen the width on the front-end. (I assume this is with JACO rims, which I use)

Can someone explain why would you want to ream out the front Jaco Rims. This to use flanged bearing? How wide should the front-end be?

Thanks

I'm old school, so I'm still using the e-clip front axles.
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Old 02-23-2007, 10:05 AM   #1144
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Quote:
Originally Posted by Carl Giordano
I noticed on the speedmerchant website, Bruce recommends purchasing a prop reamer to use on the front rims so one can widen the width on the front-end. (I assume this is with JACO rims, which I use)

Can someone explain why would you want to ream out the front Jaco Rims. This to use flanged bearing? How wide should the front-end be?

Thanks

I'm old school, so I'm still using the e-clip front axles.
You are correct about it being for the jaco rims. Reaming it would give a wider stance and more control. My guess is they are reaming out the inner bearing stop. But I dont know how they are achieving the wider stance. Maybe Mockerman or Beavis can elaborate on this.

I dont think you would be able to use the e-clip front axles with this mod.
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Old 02-23-2007, 10:13 AM   #1145
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I use flanged bearing on the front end with the Jaco rims. The flanged bearings I use are not as wide / thick as the stand the bearing. So the flanged lip rest flat against the rim.

I purchased all my bearing from McMasterCarr.com....ABEC-5 and ABEC-7 bearings.

Yes, I would like to understand how they are using the reamer to widen the front track width.
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Old 02-23-2007, 10:28 AM   #1146
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Can't wait to get mine going in a week or 2.
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Old 02-23-2007, 10:33 AM   #1147
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Hey Carl...
The reamer allows the unflanged bearing to sit further in the rim, from the outside in.
On the inside, use washers and a flanged bearing.
Doing this widens the front track which tends to settle the car down a bit in high bite situations....I noticed that it smoothes the feel of the drive as well.

Hope that helps Carl.....
See you trackside soon.
-Latif
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Old 02-23-2007, 10:57 AM   #1148
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How far do you ream the rim? To the step on the reamer?

It will be good to have you back in 1/12th, Joel, I can't wait.
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Old 02-23-2007, 11:06 AM   #1149
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That is correct. I almost always run a standard flanged bearing on the inside of the Jaco rim along with 2 washers.

Carl,
I don't think you will be able to run the e-clip axles if you do this modification because the end of the axle will probably be inside the bearing hole.

Also, when you are reaming the hole be sure you don't remove too much material from the bearing step inside the rim or your unflanged bearing will sit too deep in the rim. You will want to remove about 1/2 to 3/4 of the material from the step in the bearing hole (from the outside of the rim).

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Old 02-23-2007, 12:40 PM   #1150
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Thanks to all for the response. Latif, look forward to seeing you again.

So you understand what I did. I use Jaco rims...which are designed for non-flanged bearings.

I use a flanged bearing which had a narrower width, therefore I can use a flanged bearing without having to ream the rim.

You can purchase these bearing on the McMaster Carr website...type in ABEC-5 bearings. I purchase non-shielded ABEC-5 bearing...they last forever and spin true. part # 57155K207

Example of bearing size:
.125 id
.375 od
.1562 width (includes the flanged portion)
.1094 width (bearing portion which sits in the rim)

These bearing rest flush against the JACO rim, without the need for modifications.

Now, because I used 2x flanged bearings on each rim with the e-clip axles, I do not have enough room to run an axle spacer to widen the front-end even further. A super thin shim on the inside of the axle plus the flanged bearings = just enough axle space to use the e-clip axles.

I just purchased the threaded axles from speedmerchant, which should give me some additional track width spacing.

I would recommend trying out the bearings I mention above...they are expensive, about $7.00 each but worth while. Since they have no shields they are very easy to maintain. The ABEC-5 rating is top notch...most rc kit bearings are not even rated.

Warning: if you purchase a non-flanged front axle bearing from mcmaster with the demensions I referenced above the bearing will be too narrow! For some reason McMaster does not sell a non-flanged ABEC-5 bearing in the proper width.

Hope this helps. I'll take some measurements this weekend of the over-all front track width which I run.

PS: McMaster also sell the flanged .250 x .3125 ABEC-5 bearings for the rear axle.
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Old 02-23-2007, 12:43 PM   #1151
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I see...so you guys are reaming from the outside...Thanks
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Old 02-23-2007, 01:05 PM   #1152
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Quote:
Originally Posted by Carl Giordano
I see...so you guys are reaming from the outside...Thanks
Correct!
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Old 02-23-2007, 11:31 PM   #1153
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Quote:
Originally Posted by Carl Giordano
You can purchase these bearing on the McMaster Carr website...type in ABEC-5 bearings. I purchase non-shielded ABEC-5 bearing...they last forever and spin true. part # 57155K207

Example of bearing size:
.125 id
.375 od
.1562 width (includes the flanged portion)
.1094 width (bearing portion which sits in the rim)

These bearing rest flush against the JACO rim, without the need for modifications.
.375 is 3/8", the correct OD for a front wheel bearing is 5/16" or .3125.


Quote:
PS: McMaster also sell the flanged .250 x .3125 ABEC-5 bearings for the rear axle.
The OD for the rear axle bearing should be .375... looks like you got your OD's swapped there Carl...

By the way, I heard you were FLYING at South Shore recently... sorry I missed you.

David
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Old 02-24-2007, 12:52 PM   #1154
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Here is the setup that I ran last night. Med to high traction tight track. Stock motors.

.020 Front Springs
Lowered Steering Blocks
.5* Toe out
6* Castor
40wt Shock Oil
CRC Silver .050 Center Spring
Battery Forward
About 2* Droop
About .25 mm Sag
White Side Springs (New Style)
1/8 turn preload
Ride Height 3.5mm all around
CRC Blue In The Tubes
Parma Magenta Fronts / 1.68
Parma Pink Rears / 1.73
Parma Speed 8 HD Body

Car was awesome, as usual.
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Old 02-24-2007, 08:29 PM   #1155
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Bruce, check your e-mail!!!!!!!!!!!!!!!!!!!
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