Generally, the bottom clearance, c p is equal to c p x m = 1,1 x m to 0,4 x m This depends on the requirements of the gear design and application.įillet radius, Q fp starts at or below tooth depth and can be defined as: The bottom clearance, c p is the difference between the dedendum of the basic rack tooth profile and the addendum of the counterpart rack tooth profile.Ĭommon tooth depth, h wp of the rack and counterpart rack tooth profiles is the total of the two tip depths Tooth depth, h p of the basic rack tooth profile is subdivided by the datum line into the addendum, h ap and dedendum h fp. Tooth Depth, addendum, dedendum, bottom clearance, common tooth depth Is equal to 20 ° for a basic rack tooth profile as specified in this standard. The flanks of a tooth are symmetrical about the midline of the tooth. Pressure angle: is formed by the straight flanks an a line perpendicular to the datum line. The module, m is a length which determines the size of the basic rack tooth profile and thus of the associated cylindrical gear teeth. The basic rack tooth profile of the mating gear (counterpart rack tooth profile) is equal to the cylindrical gear basic rack tooth profile folded through 180° around the datum line. The datum line is that straight line on which the tooth thickness is equal to the space width or half the pitch:
The following defines the basic rack tooth profile for gears specified under DIN 53, 867 and similar.ĭatum Line (PP), Addendum Lime, Dedendum Line Your precious feedbacks are very important for us.Related Resources: gears Basic Rack Tooth Gear Profiles DIN 867 You can take a look at other engineering calculators available in Mechanicalland!ĭo not forget to leave your comments and questions below about spur gear constructional calculators below. Calculators are prepared based on very reliable sources.
These calculators can be very useful when you are making spur gear construction design.Īll the responsibilities of calculations made in Mechanicalland calculators are about the users of calculators. If you know the number of teeth of pinion and gear mates, and diametral pitch or metric module, you can easily calculate the center distance value between mating gears.Ĭenter distance formula via diametral pitch Ĭenter distance formula via metric module Conclusion For Spur Gear Geometrical Calculators The exact calculation of center distance is very important in terms of the construction of other elements inside machinery such as shafts etc. Maybe center distance calculation is the most important aspect of spur gear mates. Whole Depth Value: Whole depth is the summation of addendum and dedendum of a spur gear.Ĭenter Distance Calculation Of Mating Spur Gears With Calculators.Root Diameter Calculation: If you extract two dedendums from the diameter of spur gear, you will find out the root diameter value.Tooth Thickness Calculation: You can calculate the tooth thickness value of mating spur gears by using this equation pi/(2*Pa).Working Depth Calculation: Working depth is calculated as multiplying addendum with 2.Calculation Of Other Constructional Values Of Spur Gear Tooth The diameter of spur gear is calculated as the extraction of two dedendum values from the calculated outside diameter. Check your calculations with this formula Outside diameter calculated via diametral pitch formula is like below. Just like the calculator before this, you need to select the information you have about your spur gear mates metric module, or diametral pitch…