Shear Strength Achievement Anaerobics


Shear Strength Achievement Anaerobics

MIL/ISO/DIN
Test methods for determination of the shear strengths of Anaerobic compounds are similar in concept but the methods differ slightly. The method involves a pin and a collar of tight dimensional tolerances. The pin is bonded into the collar and allowed to cure at a controlled temperature. Most competitor data is given in N/mm2 and the products tend to fit into 3 main bands of performance.
 
ISO 10123
ISO utilises a pin diameter of •5" and a collar with an engagement area of •87" mild steel materials are used. The method is to secure the pin in the collar by wetting the surfaces with Anaerobic and ensuring good coverage of the surface area and allowed to cure. Fixture times can he from 2-7 minutes or longer, up to 20 minutes as determined by the design of the Anaerobic.
The shear strength is determined by the resistance measured as the push out force to break and calculated in N/mm2-• Strength Bonds tend to be Low, Medium or High in classification.
MIL specification 460821B is very similar to ISO and in MIL it is divided into 3 classes, type I, II, III, to describe strengths type I being lower strength, type II higher and type Ill differs in temperature hand.
 
DIN 54452
DIN utilises the same pin/collar method but the engagement areas are larger and the method differs a little. However results determined tend to he very similar when calculated and shown in N.mm2.
The force of movement is much faster than the ISO method and the tolerance of the engagement area is bigger than the ISO method.
A conversion chart is provided below to calculate in different styles.
 
 
Converter Chart                1 N/mm2 = 1 MN/m2 = 1 Mpa = 10daN/cm2 = 10Kgf/cm2 = 14516f/in2