King Portable Brinell Ha
rd
ness
T
ester
4
©Copyright King Tester Corporation 2017. All Rights Reserved
www.Kingtester.com
Rev. March 2017
5.
Operations
5.1
Preparation
5.1.1
Prepare the part
Choose an appropriate part to test and clean any rust, scale or dirt from around the test point before
testing. If the surface of the sample is rough or has a coating, hardened layer, or decarbonized layer, the
operator needs to grind the surface of the workpiece properly until the substrate part of the workpiece is
exposed.
5.1.2
Calibration of the tester
The King Tester is calibrated before leaving the factory. A calibration certificate is attached to the
tester. Before using the tester, verify the accuracy of the tester with a test block.
5.1.3
Select and Install the Anvil
The standard tester package includes 3 anvils:
a)
The flat anvil fits most parts and test blocks;
b)
The V anvil is used to test cylinder and convex specimens;
c)
The dome anvil is used to test concave surfaces and tubes.
Selecting the correct anvil is important to avoid unstable loading and assure the accuracy and reliability
of the test.
5.1.4
Check the Indenter
Check the indenter before testing and make sure the indenter holder is fastened tightly; otherwise it may
damage the indenter ball.
a)
Install the pump handle;
b)
Open the pressure release valve;
c)
Raise the test head to appropriate height.
Check the ram before testing to make sure the ram is retracted. If not, turn the crank, lower the test head
until it is pressing on the workpiece then apply a test force. The length of the exposed part of the
indenter cannot be more than 3/8 inches.
5.2
Operation
Put the part in the throat of the tester; turn the crank in order to make the test head move down and
clamp the specimen between the test head and the anvil. Now close the pressure release lever and load
the test force on the specimen and watch the gauge. Continue to move the pump handle. When the
gauge indicates 3000kg, the calibrating valve will work and the pressure will begin to fall. Make 3 more
pumps using the pump handle. Open the pressure release lever, raise the test head and move the tester
away from the part. Use a KingScope™ or KingScan® to measure the diameter of the indentation.
Check the tables in the appendix for Brinell hardness test results.
