Frequently Asked Questions about Electromagnetic Detector

Question number FAQ-0866

Recommended gears for the MP-900 series

Module

The module (M) is used to express the size of a gear.

Module = (Diameter of the gear's pitch circle) ÷ (Number of teeth)

Pitch circle diameter: In the case of involute gears, this corresponds to the diameter of the circle located module M mm inside the tooth crest.

With 60 teeth and module 1,
Pitch circle diameter = 60 mm,
The outer diameter of the peak is 60 mm + 2 mm = 62 mm.

Recommended gear tooth profile and material

To obtain the optimal output voltage for the MP-900 series, we recommend using involute gears.
For materials, those with a strong magnetic attraction property, i.e., ferromagnetic materials, are suitable. If a choice is possible, we recommend S45C, SS400, SUS430, FC200, etc.
We offer the MP-001 type detection gear.
There are commercially available gears.

Example of a commercially available manufacturer: Kyoiku Gear Industry Co., Ltd.

If manufactured, the dimensions of the gear and detector are shown in the diagram below.

Make 'a' the same size as 'd' or larger.
Make b the same size as c, or larger.
c is approximately 3 times d.
e should be less than or equal to half of b, and should be as small as possible.
(Approximately 0.3 mm to 1 mm)
The gear width shall be 5 mm or more.
a: Thickness dimension of the gear tip
b: Tooth height
c: The distance between teeth
d: Yoke diameter dimension
e: gap

Last updated: 2001-01-12