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Installing G7 pinned pinions?


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#1 ThunderThumb

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Posted 08 October 2019 - 10:17 PM

After you carefully grind a slot on the armature shaft and have your drilled pinion and your wire ready and pre fit the wire to see if it fits right do you , tin the armature shaft first or just install the pinion and wire and acid flux the tip and wire and solder it , what is the best way to do this , thanks


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#2 swodem

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Posted 08 October 2019 - 10:20 PM

These pinions have a groove or ‘keyhole’ for the wire?

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#3 ThunderThumb

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Posted 08 October 2019 - 10:35 PM

Yes they do have a hole and a groove , so do you install then solder or what is best process for soldering them on as it hard to line them up after there soldered 


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#4 swodem

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Posted 08 October 2019 - 10:44 PM

Never done it but I would acid flux coat everything, install and let the solder flow where the flux is

Just like assembling a chassis


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#5 ThunderThumb

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Posted 08 October 2019 - 10:49 PM

Thanks for the info will try that way out
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#6 swodem

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Posted 08 October 2019 - 10:56 PM

I don’t mean soak the pinion in flux - just where you want it to go, aye


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#7 ThunderThumb

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Posted 08 October 2019 - 11:07 PM

For sure
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#8 MSwiss

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Posted 09 October 2019 - 07:05 AM

I got out of G7, just as pinning pinions was starting to happen.

What don't you just ask Forrest?
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Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#9 ThunderThumb

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Posted 09 October 2019 - 09:00 AM

Thanks Mike , I asked Forrest and I just wanted to see how others were installing them for reference
Earl Anderson

#10 MSwiss

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Posted 09 October 2019 - 09:44 AM

I'm just not sure there's any regular Slotbloggers that race G7.

Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#11 Rotorranch

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Posted 09 October 2019 - 10:15 AM

http://www.koford.com/slot/tech.html

 

Question: How can you attach pinions on an open car without spinning?

Answer: There are two methods that have been sucessful.

Method 1) This is the most reliable and foolproof method. This is recomended for the M515 straight pinned pinion only. Grind a groove in the shaft for the pin, located so that the pinion is centered on the spur. Slide the pinion on so that the hole aligns with the notch. Bend an L in a piece of M636 wire, slide one end through the hole. Carefully bend the other end so that the piano wire form a U, trim it so that the ends of the wire point away from the motor and are flush with the end of the pinion. Either apply flux and solder to the end of the motor shaft and pin wire or use two part epoxy. When it is time to remove the pinion use a gear puller, this will break the wire into three pieces, make sure that you remove these pieces form the can and magnet so that they don't get caught between the arm and magnet and take out your magnets. Check the pinion for cracks around the hole, if cracks are found discard the pinion, otherwise reuse it. Next time install a new piece of M636 wire and repeat the steps above.

Method 2) Completely remove any old solder from the motor shaft and tin using use M618 high melting point solder, flux and then slide on a new M543 or M542 pinion using an iron (or torch), apply heat until you see the solder on the inside of the pinion melt. If there is no solder on the inside remove the pinion apply a greater quantity of solder and install pinion again. Remove gear with gear puller.


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