How Do You Size A Spur Gear?

1, Measure diameter
1.1 Measurement method for spur gear outer diameter
Usually, a diameter measuring instrument or micrometer is used to measure the outer diameter of a gear. Before measuring, the gear surface should be cleaned and the zero position of the measuring tool should be ensured to be correct; Next, align the outer diameter and diameter measuring instrument or micrometer scale of the gear to determine the size.
1.2 Measurement method for gear inner diameter
The inner diameter of gears is usually measured using a caliper. Place the caliper card inside the gear and rotate it to ensure that the tip of the card does not come into contact with the gear teeth; Move the caliper and measure the most areas to determine the inner diameter size.
2, Measure thickness
2.1 Method for measuring the total width of gears
The total width of the gear is the sum of the thickness and clearance of the gear teeth. The total width of the gear can be measured using a micrometer or depth caliper. Press the tip of a micrometer or depth caliper onto the bottom of the gear, gently shake to ensure that the tip contacts the bottom, and then read the measurement result.
2.2 Measurement method for gear tooth thickness
A micrometer can be used to measure the thickness of individual gear teeth. Press the tip of the micrometer between the tooth peaks and grooves of the gear, and read the measurement results while ensuring that the micrometer is perpendicular to the gear.
3, Measure tooth height
Measure the tooth height of the gear using a universal height gauge, depth caliper, or tooth height gauge. Among them, the tooth height gauge is a specialized instrument for measuring gear tooth height, which is the most convenient to use. Place the protruding part of the tooth height ruler at the tooth peak, and move the ruler head to measure the tooth pitch in a straight line; Move to any tooth slot and measure the maximum distance to determine the tooth height parameter.
4, Measure tooth pitch
Tooth pitch is the distance between adjacent gear teeth, usually measured using a hanging tooth pitch meter or tooth pitch meter. Place the instrument on the tooth peak between adjacent alveoli and read the measurement results. During the measurement process, it is necessary to pay attention to adjusting the position of the instrument to ensure the accuracy of the measurement.
In summary, the measurement of gear dimensions requires careful operation and attention to the accuracy and usage of measuring tools. Only by ensuring correct measurement results can the quality and effectiveness of gears be guaranteed.