What Is a Testing Hammer?
A testing hammer, also known as an inspection hammer, is a type of hammer designed to detect cracks, wear, and other defects in materials. This is achieved by interpreting the feel and sound transmitted to the hand when the hammer strikes an object.
The head of a testing hammer typically features a flat striking surface on one side and a pointed end on the opposite side.
How to Use a Testing Hammer
To check for looseness in a bolt or nut, lightly tap the flat part of the testing hammer’s head in the direction the nut is tightened while placing a finger on the underside of the nut. Pay attention to any abnormal vibrations or sounds transmitted to your finger during this process.
Since testing hammers rely on sensory inspection, where results are not quantifiable, correct interpretation of the findings requires a degree of skill and experience.
The pointed part of the testing hammer head is utilized for more precise inspections, allowing for targeted strikes.
How to Select a Testing Hammer
Testing hammers vary in size, depending on the weight of the head and the diameter of the striking surface. Choose a size appropriate for the object being inspected.
Testing hammer heads are commonly made of carbon steel. However, options such as stainless steel and copper alloy hammers are also available. Stainless steel hammers are rust-resistant, making them suitable for humid environments. Copper alloy hammers are non-flammable and spark-resistant, ideal for inspecting equipment in chemical plants and areas where fire risk is a concern.
Testing hammers come with handles ranging from 40 to 100 cm in length. Wooden handles are often preferred due to the quality of wood with low moisture content, which is important for the feel of the hammer in hand.