‘Dry firing’ is a common term used to describe the operation of a pneumatic tool when either a tool bit is not installed in the tool or insufficient pressure is being applied to the work while being operated. All pneumatic tools are designed to withstand the inevitable ‘dry firing’ but constant misuse will lead to tool failure.
What causes Dry Firing?
Dry firing occurs when a pneumatic tool is operated without a tool bit installed, or when it is used with insufficient pressure (or sometimes no pressure at all) applied to the workpiece. This situation can occur in various scenarios, such as during rushed work or through simple oversight.
Pneumatic tools are engineered to be robust and can handle occasional dry firing. However, frequent misuse of this kind stresses the tool unnecessarily and will inevitably shorten its lifespan.
The Consequences of Dry Firing
- Internal Damage: When a tool bit is not installed, the pneumatic tool ends up absorbing the energy of the blow itself. This hitting force impacts critical internal components like tappets, tappet bushings, and pistons. Over time, this repeated internal hammering degrades these parts, leading to malfunction or total tool failure.
Recoil and Bouncing: If the tool is used with insufficient pressure—particularly in horizontal operations—it tends to bounce off the workpiece while continuing to fire. This not only poses a safety risk but also contributes to the same kind of internal damage caused by operating without a bit. The bouncing action creates additional wear and tear on the tool’s internal mechanisms.
Best Practices to Prevent Dry Firing
Extending the life of your pneumatic tools and ensuring their efficient operation isn't complicated. It requires adherence to a few key practices:
- Proper Tool Bit Installation: Always ensure that the correct tool bit is securely installed before using a pneumatic tool. The right bit not only prevents dry firing but also ensures that the tool performs its task more effectively and safely.
Maintain Constant Pressure: Applying a steady, adequate pressure on the tool against the workpiece is crucial. This practice helps minimize the tool’s recoil and prevents it from bouncing, thus avoiding unnecessary strikes that can damage the tool internally.
Controlled Use of Throttle: Be mindful of the throttle lever, especially when breaking through a workpiece or when removing the tool from work. Releasing the throttle lever reduces the risk of unintended firing, which can occur when the tool suddenly finds itself without resistance.
Conclusion
Dry firing may seem like a minor accident, but its impact on the life and effectiveness of pneumatic tools is significant. By understanding what causes dry firing, recognizing its harmful effects, and implementing straightforward preventive measures, you can significantly extend the life of your tools while maintaining their performance.
