10 replies to this topic

[rodslot53]

Hi,

 

Hopefully someone can advise on this. I have just stripped down a Champion motor that had been fitted to a chassis I bought a while back. I hope to rebuild it to install in a Champion Group 20 (British) chassis. It had a Group 20 armature fitted. I was looking to replace the endbell with a new Pro Slot version, but it rattles in the opening. I measured the can, and also a Mura C-can and realised there is approximately 1mm of a difference in the height of the cans. What new endbell will fit? Plus the can bearing needs replacing, can I fit a ballrace into these cans. 

 

The Mura C-can measures 15.81mm high whereas the Champion can is 16.85mm. The can bearing is  25mm dia.

 

Is the Champion can a different motor all together, not a C-can?

 

Hope someone can enlighten me.

 

Rod

[Pablo]

I'm not real sure which can you have. Champion made and sold many different cans.

 

There were so many different brands and sizes of cans, arms, and endbells made in that era it would be hard to say what will fit.

Good pictures and accurate measurements of INSIDE can height, width, and length, plus the bearing hole ID would be needed.

 

There are a handful of motor historians here who may be able to guess what you need. You may have a Champion 16D chrome can with a large gimbal ball bearing on it.

Endbells for those exist, maybe even brand new. 

[Bill from NH]

Can you post a photo of what you have? Champion's two versions of the C-can were both drawn & had two slots on both the top & bottom. The C-can Mura later manufactured for Champion was a folded can. I believe they had two rectangular holes with a single  slot between them on both the bottoms & tops.

[Dave_12]

i suggest you get yourself a new Proslot  C can . That will solve all your problems . 

[Bill from NH]

Dave, I believe Rod's building a vintage slot car rather than a contemporary race car, thus the use of Champion can, armature, & Group 20 chassis.

[Don Weaver]

i know the Champion 517 motors of the late 60's used a slightly larger endbell than the standard 16D.  I'll look for one and see what the measurement is.

Don

[Bill Seitz]

Based on the Champion can being taller and the size given for the can bearing, I'm thinking this is a 16D Champion/Mabuchi can with the large fitting for the floating bearing, not a C-can, and I'd try a 16D endbell. All the vintage C-cans I've seen use 6mm bearings. A G20 arm can still be used in a 16D. 

 

Current ProSlot and Parma Rotor 16D's are made to fit the same endbell as a C-can which leaves a gap between the bottom of the endbell and the bottom of the can. This offset is handy for fitting a 16D motor into a chassis with a smaller motor box, but I'm not sure this will provide a correct fit to the older cans - I've not tried it. The Parma Deathstar 16D motor looks like it still uses the full-size endbell, but Mid-America isn't showing a replacement for that endbell, only the S16D.

 

Mid-America does have vintage Champion C-can endbells in red and black, but the dimensions given for the can size these fit are smaller than the OP's can.

[MSwiss]

Shim the inside of the can, top and bottom, with the appropriate thickness brass, soldering it in.

 

Or glue said shims on the top and bottom of the recessed flange of the endbell.

[Bill Breck]

Mid America sells vintage NOS Champion C can endbells. You might want to take a look and ask about the dimensions.

 

https://slotcarstore...d)-W138812.html

 

[Mike Patterson]

Rod, is the bearing on your endbell pressed into the plastic, or is it attached to a brass plate that fastens to the endbell? Also, is the can bearing larger in O.D. than the endbell one?

 

The photo above looks like an old Mura endbell, only in red.

[Bill from NH]

Mike is correct, the red endbell shown is the old Mura C-can under-n-over for a 6 mm bushing /bearing. We used those endbells during the 70s & 80s when building motors with the Champion 2-slot C-cans. They fit those cans so tightly you usually had to turn the sides down a few thousands in order to fit the Champion cans. I still have a jig I made for doing that on my lathe. At first, Champion didn't have a C-can endbell. When they did, the quality was inferior to the Mura & the Mura hardware. I & professional motor builders such as Joel. Russ Boyington, Walt Labree, & others continued to build using Mura endbells.