Frequently Asked Questions Related to Electromagnetic Detector

Question number FAQ-0866

Recommended gears for the MP-900 series

module

The module (M) is used as a method to express the size of gears.

Module = (Pitch circle diameter of the gear) ÷ (Number of teeth)

Pitch circle diameter: For involute gears, it corresponds to the diameter of the circle that is Mmm inside from the tooth tip.

With a number of teeth = 60 and module = 1,
the pitch circle diameter = 60 mm,
the outside diameter of the tip = 60 mm + 2 mm = 62 mm.

Recommended gear tooth profile and material

To achieve the optimal output voltage for the MP-900 series, we recommend involute gears.
As for the material, those with a strong property of being attracted to magnets, namely ferromagnetic materials, are suitable. If selection is possible, I recommend S45C, SS400, SUS430, and FC200.
The MP-001 type detection gear is being prepared.
There are commercially available gears.

Example of a commercial manufacturer: Kyouiku Gear Industry Co., Ltd.

In the case of production, the diagram below shows the dimensional relationship between the gear and the detector.

a is the same size as d or larger.
b should be the same size as c or larger.
c is about 3 times d.
e should be less than half of b and made as small as possible.
(Guideline: within 0.3 mm to 1 mm)
The width of the gears must be 5 mm or more.
thickness dimension of the gear tip
Tooth height dimension
c: spacing dimension between teeth
Yoke diameter dimensions
e: gap

Last updated: 2001-01-12