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#1 Ecurie Martini

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Posted 23 July 2018 - 04:26 PM

I was just on the Sonic site and it appears that most of their line is "discontinued"  I am not familiar with some of the other gear sources that I have seen mentioned over the years.

 

Looking for a vendor/source for 64-80 DP pinion/spur sets for sidewinder application with 2.2:1 to 2.4:1 ratios - application:  very light 1/32 cars for a series limited to 14.5K motors.

 

Any suggestions?

 

EM


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#2 chaparrAL

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Posted 24 July 2018 - 12:17 AM

Google  Gizmoszone 

They have 0.4 module gears  that are 64 pitch   and   0.3 module gears that I think are the same as 80 pitch.


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#3 MSwiss

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Posted 24 July 2018 - 09:44 AM

You'll get an awesome gear mesh using a 64P ARP 15T pinion, with a JK 34 or 35T, 64P spur.

If it's a sidewinder application, go with a 6415 straight pinion, if a anglewinder, an angled 6415A pinion.

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#4 Phil Hackett

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Posted 24 July 2018 - 10:01 AM

I was just on the Sonic site and it appears that most of their line is "discontinued"  I am not familiar with some of the other gear sources that I have seen mentioned over the years.

 

Looking for a vendor/source for 64-80 DP pinion/spur sets for sidewinder application with 2.2:1 to 2.4:1 ratios - application:  very light 1/32 cars for a series limited to 14.5K motors.

 

Any suggestions?

 

EM

 

The website is extremely outdated and, yes, many things listed are not available. Not listed are 64p, 17-20t pinions (in stock), solder on (30-xx). They are intended for "Big Block" drag racing. We also have 44t drag crowns made of aluminum (231-44) and I believe there might be some 44t spurs (again aluminum) around. So, there's your 2.2:1 ration.... 44/22....


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#5 MSwiss

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Posted 24 July 2018 - 11:16 AM

Phil,
I think you meant 44/20.

Regardless, he's using these for 1/32 scale.

I have a feeling the 44 tooth spur would be way too big.

Mike Swiss
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


#6 Ecurie Martini

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Posted 24 July 2018 - 12:59 PM

Gentlemen:

 

Thank you for the advice and counsel.  It looks like I have several options including the 44t 64DP spur.  My gear dimension chart comes up with an OD of 18.25 mm.  The cars in question will be pre-1962 sports/racing carrying tires between 20.5 and 22 mm so gear clearance is not a problem.

 

I'll need to make a few measurements and run some numbers to make the choice.  In an effort to minimize weight, the motor can is part of the chassis with an axle carrier soldered directly so the motor shaft to axle dimension is critical.  The pitch diameter of a 44T 64 DP spur is 44/64 = 17.46 mm and the corresponding 20t pinion is 20/64 = 7.4 mm so the shaft/axle measurement will be 25.4 mm +/- allowing for clearance etc.  I believe that will work. (the 15/35 combination yields a center-to-center measurement of 19.8 mm - also a good figure.)

 

Last question - stocking dealers?

 

THX

 

EM


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