The Checking of splines and gears
See the materials used for plain gauges. For gear gauges, material such as Gcr15 or SKD11 can be used.
The material Gcr15 is a composite material whose properties allow optimized hardness as well as reduced friction thus generally reducing wear.
This hardness can be improved further by the use of surface coatings allowing us to reach a surface hardness of 58-62HRC. This point is explained further in the chapter "the special gauges".
Each type of material imparts in the gauges special properties according to their use. It is therefore necessary to give us the maximum information on the use (in laboratory, workshop…) in order for us to offer you the most suitable product.
Different types of Splines
Splines are used for the transmission of force in rotating assemblies while assuring a strong connection.
There are 3 types of spline :
Splines with sides in involutes : following the standards NF E 22.141/NF E 22.144/NF E 22.145, DIN 5480/ANSI B 92.1…
Parallel splines : NF E norm's 22.131…
Linear splines : with norm's 5481…
Generally, the "GO" part of the splined gauges has a complete profile while the "NOGO" part has a reduced profile containing only a few teeth. There is a possibility of using elementary gauges (plain plug, flat gauge…) for the checking of NOGO but they do not check each tooth.
Master Gears
The master gears are masters with an excellent geometry allowing you to simulate mating, on control machines, with the products manufactured.
These machines will make it possible to deduce a false round, the radial error, the radial jump of the tooth and distances between centres.
Spline gauges or master gears are very technical products utilizing many characteristics and various complex standards. For this reason, we submit before starting gauge production, a drawing with the various characteristics and requirements of the gauges or setting gauges.
The acceptance of the drawing by the customer makes it possible to confirm that the intent of the drawing meets the needs of the customer and at an early enough stage so as to indentify any potential problems with the interpretation of the standards.
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