The gear module is calculated using the formula: \[ m = \frac{d}{N} \] Where: - \( m \) is the module, - \( d \) is the pitch diameter of the gear, - \( N \) is the number of teeth on the gear.

What is the gear module? How is it calculated? What is the calculation formula? For friends who are new to gear processing, it may not be very clear. Next, the gear processing manufacturer Shouyue Electromechanical will share the calculation formula for gear modules for reference and understanding. 1. What is the gear module? The gear module is an abstract measure used to quantify the size of gear teeth. It is a factor that determines the size of the teeth and is one of the most basic parameters for gear teeth manufacturing. The gear module is related to several important parameters that make up gear products, such as the pitch circle, pressure angle, number of teeth, and tooth pitch. 1. The standard module series is formulated based on requirements for design, manufacturing, and inspection. The modules for spur gears, helical gears, and bevel gears can all refer to the standard module series table. 2. Many custom mass-produced gears use non-standard modules. 3. For gears with non-spur teeth, there are differences in normal module mn, face module ms, and axial module mx, all of which are based on their respective tooth pitches (normal tooth pitch, face tooth pitch, and axial tooth pitch) and the ratio to pi, measured in millimeters. 4. For bevel gears, there are distinctions between large end module me, average module mm, and small end module m1. 2. How to calculate the gear module? What is the calculation formula for the gear module? 1. Calculation formula for helical gear module: a. Pitch circle diameter calculation Do = (number of teeth Z * module m) / cosB b. Diameter calculation Dk = ((number of teeth Z * module m) / cosB) + (module m * 2) c. Circumference of the gear when it rotates one circle Z = pitch circle diameter Do * π Note: The calculation for the installation center distance from the gear center point to the bottom surface of the rack is: installation center distance Hb = (pitch circle diameter Do / 2) + meshing center line Ho. 2. Calculation formula for spur gear module: a. Pitch circle diameter calculation Do = number of teeth Z * module m b. Diameter calculation Dk = (number of teeth Z * module m) + (module m * 2) c. Circumference of the gear when it rotates one circle Z = pitch circle diameter Do * π Note: The calculation for the installation center distance from the gear center point to the bottom surface of the rack is: installation center distance Hb = (pitch circle diameter Do / 2) + meshing center line Ho. If the number of teeth of the gear is fixed, the larger the module, the larger the radial size of the wheel; the larger the module, the higher and thicker the gear teeth; with a constant module, the larger the number of teeth, the more gradual the involute, and the thickness of the tooth tip circle and tooth root circle will correspondingly increase; with a fixed number of teeth, the larger the module, the larger the gear teeth, the stronger the resistance to breakage, and of course, the gear blank will also be larger, resulting in larger spatial dimensions. Therefore, when selecting gear processing products, it is necessary to consider various parameters comprehensively and choose the appropriate model specifications based on the actual application requirements.

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