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12/29/2010 11:07 am  #1


K&B repro or NOS parts

Hi, that looks like a CART repro of a K&B.  I sent a repro K&B rear end to Bill from BAD earlier this year.  Im sure he can make you a repro, find a post by him on this site & email him.
A couple of ruskitt rear hoops came up on eBay recently very cheap, as far as the 857, they are rare, so keep looking on e-bay. I just missed out on one last week. 

Bill, can you help Marcus?

Mark 


Any sufficiently advanced technology is indistinguishable from magic
 

12/29/2010 6:08 pm  #2


Re: K&B repro or NOS parts

Marcus, is this what you're looking for? These are the repro's. I also have a pattern for the original K&B's.

http://lh6.ggpht.com/_weZB2bdbxoY/TRvmZ_3D5qI/AAAAAAAAAs4/exB5Mh2RhUo/K%26B1.jpg


NZ Mark, Is this an 857 RAM?

http://lh4.ggpht.com/_weZB2bdbxoY/TRvmVldetOI/AAAAAAAAAs0/ZpK8xlbA1ts/RAM1.jpg


Bill

 

12/29/2010 6:16 pm  #3


Re: K&B repro or NOS parts

Bill, it cretainly looks like one (7 pole, right?).

I wouldnt cut, grind or alter that "case".  You can get plenty of Pitmann 85s around so if you want to do some machining, lamination shaping (or bearing replacement) etc, do it on one of those and save the RAM. ie just use thre Arm.

Mark


Any sufficiently advanced technology is indistinguishable from magic
 

12/29/2010 6:52 pm  #4


Re: K&B repro or NOS parts

Mark, yes it's 7 poles and does it ever sound strong. You can see the size difference of the wire compared to the Pittmans or Kemtrons, noticeably heavier. This is the first one I've come across with the thick and thin laminations. Your right, I won’t alter this motor.

Bill

 

12/30/2010 8:50 am  #5


Re: K&B repro or NOS parts

Bill, I have one original and unfortunately when I was young and stupid I machined the one and removed/spaced /formed laminations... but that is the one I put  neos in, that Im going to make the Cabon fibre mairails for. 
As I mentioned once before with the stack of neos installed, the motor "clicks" the poles like a Group 20!
May be too much but what I get around to it I'll find out.

Good luck Marcus with your journey back to the future!

Mark


Any sufficiently advanced technology is indistinguishable from magic
 

12/30/2010 4:19 pm  #6


Re: K&B repro or NOS parts

Yep, young and dumb.....been there done that. lol

Mark while we're on the subject of vintage motors take a look at this one. It about the size of a Pittman 65 or the small Kemtron. Not a marking on it anywhere. It's 5 pole and runs fine just not as strong as a 65. Any ideas on who manufactured it?

http://lh5.ggpht.com/_weZB2bdbxoY/TR0g36xouHI/AAAAAAAAAtM/CvA7BtFC-Hk/s512/Unkown1.jpg

http://lh3.ggpht.com/_weZB2bdbxoY/TR0hE39-r4I/AAAAAAAAAtQ/A2pIp7MJfKA/s512/Unkown2.jpg

 

12/30/2010 5:41 pm  #7


Re: K&B repro or NOS parts

Bill I have never seen one before sorry.

Odd innovative spring set up
Could it be one of the fabled custom built "Lionel" motors?

Mark


Any sufficiently advanced technology is indistinguishable from magic
 

1/02/2011 5:00 pm  #8


Re: K&B repro or NOS parts

Markus if you really want to hop up one of these motors:

- add roller bearings,
- remove weight by:
      getting rid of un necessary laminations (add spacers)
      reshaping laminations
      milling endplates
- add neo magnets (so you dot have to keep rezapping
- add stronger spring

here is an article I did about it:
http://i236.photobucket.com/albums/ff277/mhaston/SlotCars/HowTo/HowtoRAM857.jpg


here is the project for 2010 "back to the future":

http://i236.photobucket.com/albums/ff277/mhaston/SlotCars/Workbench/NeoRAM85700.jpg


http://i236.photobucket.com/albums/ff277/mhaston/SlotCars/Workbench/BackToTheFutureRail00e.jpg

Mark


Any sufficiently advanced technology is indistinguishable from magic
 

1/03/2011 5:32 pm  #9


Re: K&B repro or NOS parts

In the post by blueslac he mentioned an arm with 19 segments. I assume that is arm stack laminations. So just out of curiosity I looked through my 7 pole arms and found there are arms with 4 different stack lengths 16,17,18 and 19 laminations.
Why are the 19s better?

I’m using the RAM brushes on my motor at 16v and they work fine. Yes, experiment with springs they make a huge difference.

Thanks for sharing this information with us.

Bill

 

1/09/2011 8:17 pm  #10


Re: K&B repro or NOS parts

Looking further into the armature length subject I was interested in finding out how much difference in ohms there is between the 4 stack lengths. Using a Fluke Digital Multimeter we started checking each arm on every pole. What we found was almost 2 ohms difference between the 16 and 19 stack laminations.

16 - 2.5 ohms
17 - 2.3 ohms
18 - 1.1 ohms
19 - .7 -.8 ohms

The 19 was just a bit higher then the .5 mentioned and we contributed that to the accuracy of the digital meter versus the analog meters of the 60's. For fun I pulled out my old Triplet analog and checked the 19 and sure enough we got .5-.55. lol

With this new rediscovered information my next Neo Pittman/RAM motor will defiantly have this 19 arm in it.

Keep this kind of information coming; we're going to need more of the old speed secrets you all used. Have any tips on gearing?

Thanks,
Bill

 

5/27/2014 11:35 pm  #11


Re: K&B repro or NOS parts

BAD Racing wrote:

Yep, young and dumb.....been there done that. lol

Mark while we're on the subject of vintage motors take a look at this one. It about the size of a Pittman 65 or the small Kemtron. Not a marking on it anywhere. It's 5 pole and runs fine just not as strong as a 65. Any ideas on who manufactured it?

http://lh5.ggpht.com/_weZB2bdbxoY/TR0g36xouHI/AAAAAAAAAtM/CvA7BtFC-Hk/s512/Unkown1.jpg

http://lh3.ggpht.com/_weZB2bdbxoY/TR0hE39-r4I/AAAAAAAAAtQ/A2pIp7MJfKA/s512/Unkown2.jpg

 Hi Bill,
That is a Gene Husting motor.


"Can't thank my sponsor's enough...... because I don't have any".
 

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