31 replies to this topic

[MSwiss]

Yes, I've seen Mario Schone, back in the early to mid-'90s, using the method you describe.

 

My idea would require getting the pinion pretty hot, and just hitting the power on and and off, quickly.

 

I have no idea if it's a good idea.

 

Just musing.

 

I've been going at it pretty hard, since about 7AM, filling a couple dist. orders, and I needed a break.

[gotboostedvr6]

Kisling taught me the power supply method of centering/ installing pinions maybe 9 years ago. I've used it successfully ever since.

[Jay Guard]

I don't doubt at all what Dan/Mike have said about the Europeans getting their pinions perfect as I know they are obsessed with precision. However two thoughts come to mind.

 

 First, assuming the armature shaft isn't "too" undersized, wouldn't the capillary action of the solder overcome the relatively light weight of a pinion gear, especially a 5 or 6 tooth?  

 

Second, why not just hold the motor vertically and again let the capillary action center the pinion?  

 

Just a couple of random thoughts, clearly worth all of $.02.

[Dan Miller]

Jay,

 

You raise a good point about the solder filling the gap equally all around. Maybe that is why I watched the Euro guys leave the indicator point pressing up against the pinion and heating it again after the first few attempts failed to show the result they wanted.

 

Your second idea relies on both the shaft and hole in the pinion being right where they should be but it is not too far-fetched a method when you think about it. If the shaft is ground properly and the pinion is accurate... could work OK.

[swodem]

On the subject of spinning the motor shaft/pinion on the shaft while it cools (for centering) - I think this is very dangerous as my understanding is solder that is moving while it cools to hard setting temp is weaker.


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[MSwiss]

I've always wondered about that.

 

On my own G7 stuff, whenever I had to spin solder out of the teeth, I would go back, take off the pinion, re-tin the shaft (with a little less solder - lol), and reinstall the pinion, letting the solder cool, naturally.

 

That said, I spin solder out of customer's pinions, all the time, and I've never noticed that it leads to future spinning.

 

That said, it's never with G7 motors, (like I mostly raced).

[gotboostedvr6]

I've always wizzed the motor with the solder still HOT and to this date have never spun a pinion.