3mm gear - Printable Version

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+--- Thread: 3mm gear (/showthread.php?tid=3720)

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3mm gear - Charlie - 5th-May-23

Can anyone suggest where I can get 3mm gear to fit Scalextric sport axle ?  Or does someone have one they would part with, 27t, ta

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RE: 3mm gear - Kevan - 5th-May-23

Pendle have a sale on a set of 5 sidewinder scaley sports gears

https://www.pendleslotracing.co.uk/scalextric-sport-spur-gears.html

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Charlie - Charlie - 5th-May-23

Thanks Kevan but I need inline

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RE: 3mm gear - Kevan - 5th-May-23

Thought as much, none listed I'm afraid 

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RE: 3mm gear - chrisguyw - 5th-May-23

Hello Charlie, Plafit made a few Crowns for 3mm axles (same .5 module pitch as most of the modern plastic Crowns found on Slot-it,Scaley, NSR etc.)

I believe that a 28T was their smallest tooth count,.......google Plafit PL8531A.

Sigma "BRM" also has a 3mm Crown in a 30T,...............google Sigma S-027S30..........


Scaleauto also make some 3mm Crowns, but their smallest tooth count is a 32T.


Cheers
Chris Walker

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Charlie - Charlie - 31st-May-23

An update, I managed to get two sport+ gears, a 27t and a 29, I have used the smaller one for now which is giving the car standard gear set up, now I have a spare gear and axle set up, what pinion should I use to get somewhere near the 9/27 ratio?  I thought maybe a 10/11 tooth pinion ? Or should I try it with a 9 , track is 100 feet with two straits, longest about 12/14 feet ?
Ta

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RE: 3mm gear - Kevan - 31st-May-23

As 9/27 = 3:1

Simple maths to work out the same ratio for 29T...

29/3=9.7 so 10/29 is going to be as close as you'll get which is 2.9:1 (which will give you a little more top speed and slightly less acceleration and brakes)

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RE: 3mm gear - Charlie - 31st-May-23

Thanks Kevan, funny I can sort my sprockets out on my motorcycles easily but struggle with these little monsters.....

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