Crank trigger Wheel: Minimum Tooth Heigth

[DonMaximo]

I want to relocate my 36-1 crank trigger wheel and this will require, in the least, shortening the tooth height by 0.128" or more.

How short can a tooth be -AND- still functioning consistently ??

I'll be using the 3-wire Hall effect crank sensor sold by DIYAUTOTONE

Remind me: Was the sensor to tooth gap = 0.04" ??

Thank you

[billr]

How high will the teeth be? A height of .080" should be OK (wingin' it here...), and a closer gap should help. With near-zero run-out, which you should shoot for since you are trimming the OD anyway, and decent crank bearings, gap can get down to .005-.010" with no problem. Even though the OD may be perfect, pay attention to "run-out" of the tooth root, variation in the tooth height matters.

[dontz125]

DIY has the specs on their sensors on the website, if not the actual datasheets. You didn't say if you had the red threaded sensor or the tabbed / flanged black sensor; I'm assuming you don't have the older silver threaded sensor.

The red sensor:

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Nominal air gap: 1.5 mm
Recommended tooth size is a rectangle measuring at least 2.5 mm x 6.35 mm, with a 5.0 mm tooth height.

The black sensor:

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Maximum air gap: 5 mm
The trigger wheel must be at least 2 mm wide, the teeth and gaps at least 2 mm wide, and the gaps at least 2 mm deep.