Contents
What is a hunting tooth in a gear design explain?
: a tooth in the larger of two geared wheels which makes its number of teeth prime to the number in the smaller wheel with the object of equalizing wear.
What is the tooth of a gear?
The tangent line of the base circle of the gear and the base circle of the pinion form the line of action for the gear set. The tooth thickness, diametral pitch and pressure angle all go into determining the gear tooth profile. These factors are determined by the desired contact ratio between mating parts of the gear.
What does more teeth on a gear do?
Thus, the larger a gear’s radius, the slower its rotational speed. When the teeth of two gears interlock, the gears themselves move at the same speed (meters per second or feet per minute). Rotational speed is proportional to the circumferential speed of a wheel—circle—divided by its radius.
What is gear mesh frequency?
Gear Mesh Frequency is the product of the number of tooth on the gear multiplied by the running speed of the gear. The formula that is used for this is as follows: GMF = No. Teeth x RPM.
Why are hunting teeth used to avoid gear ratios?
A “hunting tooth” is used to avoid gear ratio s where the tooth count of one gear is an exact multiple of a gear it mates to (e.g. ratios 1:1, 2:1, 3:1 …). The reason for avoiding integer gear ratios is that in such a design each tooth of the smaller gear always contacts exactly the same tooth or teeth in the gear it mates to.
When do you use a ” hunting tooth “?
In design of all kinds of power transmission gearing, also applicable to design of chain or toothed belt drives. A “hunting tooth” is used to avoid gear ratio s where the tooth count of one gear is an exact multiple of a gear it mates to (e.g. ratios 1:1, 2:1, 3:1 …).
Which is the best gear set to use?
This is the best configuration for gears, since any tooth on either gear will contact every tooth on the other gear before encountering the same tooth. This spreads the wear evenly over all the gear teeth, increasing the life of the gearbox.
How does the number of teeth in a gearbox affect the life of the gearbox?
This spreads the wear evenly over all the gear teeth, increasing the life of the gearbox. The hunting toothfrequencyof a pair of gears is the gear mesh frequencydivided by the least common multiple of the numbers of teeth on the two gears. The least common multiple is often just the product of the numbers of teeth.