PROPER USE & CARE OF TOOL BITS

Tool bits are made and heat treated to specification.

Tool bits, however well made, are wear parts, and are used in the most destructive applications. Even when the hydraulic breaker is used properly, and the operator is an experienced one, a tool bit may become damaged. When a tool bit has been damaged, it is useful to de- termine the cause immediately in order to prevent the damage from occurring again.

All Stanley tool bits are machined and hardened for maximum performance. Care must be taken to maintain the tools original condition for optimum productivity and life expectancy. It is not uncommon for an operator who is unfamiliar with using a hammer to break a point. This is part of the learning experience.

Listed below are several methods to determine tool fail- ure and will quickly aid in warranty determination.

TOOL FAILURE NOT COVERED UNDER WARRANTY

BLANK FIRING OR FREE RUNNING

This occurs when the tool is not in proper contact with the work, thus causing the energy produced by the ham- mer to be concentrated on the tool retainer(s) and the retainer slot(s) on the tool itself. Caution should be used to prevent the hammer from sliding off slanted surfaces or when breaking through thin material.

The illustration below is typical of the kind of breakage that occurs from excessive blank firing.

Figure 13. Excessive Blank Firing Breakage

WORN-OUT FRONT BUSHING(S) OR RETAINER PIN(S)

Worn-out front bushing(s) will cause the tool to become misaligned inside the hammer. This misalignment will cause uneven contact between the piston and tool, thus causing stress to concentrate on one particular area of the tool. This can also cause the tool to bind inside the hammer. Call your dealer for acceptable wear allow- ances.

Worn-out retainer pin(s) will cause uneven loading on the pin(s) themselves, causing failure of the tool or re- tainer pin(s). This will also cause excessive wear to the front bushing(s).

METAL-TO-METAL CONTACT

Extreme caution should be used to avoid scratches or gouges on the surface of the tool. These areas create a stress concentration Metal-to-Metal Contact point, thus weakening the tool.

Another form of metal-to-metal contact is galling, which usually occurs from the lack of lubrication. Special care should be taken to keep the tool shank lubricated every two (2) to three (3) hours.

Steel failures that were caused by surface damage take two main forms. The simplest form is caused by deep scratches on working steel surface. The broken surface has a shell pattern around the starting point of failure, similar to the one in the fatigue failure. The other parts of the broken surface are brittle. These failures work slowly through the steel until it suddenly parts completely.

The second form of failure caused by surface damage occurs when there are deep scratches on working steel surface and there was also excessive bending stress. The broken surface also shows the shell pattern, but the other parts of the broken surface are brittle and usually have a “lip” like that in a stress failure.

Figure 14. Metal-to-Metal Contact Examples

MBX15 User Manual ◄ 15

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Stanley Black & Decker MBX15 user manual Proper USE & Care of Tool Bits, Tool Failure not Covered Under Warranty
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MBX15 specifications

The Stanley Black & Decker MBX15 is a robust and versatile tool designed for professionals and serious DIY enthusiasts alike. Engineered to meet the needs of various applications, this machine stands out in the crowded marketplace of power tools, providing exceptional reliability and performance.

At the heart of the MBX15 is its powerful motor, which delivers impressive torque and speed, enabling users to tackle a wide range of tasks with ease. The efficiency of this motor allows for quick job completion without sacrificing quality. One of the standout features of the MBX15 is its lightweight design, making it easy to handle during extended use. The ergonomically designed handle ensures maximum comfort, reducing fatigue and enhancing user control.

The MBX15 incorporates advanced technologies that set it apart from its competitors. For instance, it features an innovative vibration-dampening system that minimizes user discomfort. This technology is especially beneficial during prolonged operations, allowing for greater precision and fewer errors. Additionally, the tool is equipped with a quick-change system, enabling users to switch attachments seamlessly, thus enhancing productivity.

A distinctive characteristic of the MBX15 is its versatility. It comes with a variety of attachments specifically designed for different applications such as grinding, polishing, and even surface preparation. This multifunctionality makes it an essential addition to any workshop or job site.

The MBX15 also prioritizes safety, incorporating several features to protect users during operation. The integrated safety switch prevents accidental start-ups, and the durable housing safeguards the internal components, ensuring longevity and reliability even in demanding environments.

In terms of design aesthetics, the MBX15 boasts a sleek and modern look, complete with a sturdy build that reflects the quality synonymous with the Stanley Black & Decker brand. This tool not only delivers on performance but also complements the professionalism of its users.

In conclusion, the Stanley Black & Decker MBX15 is a formidable tool equipped with a powerful motor, innovative technologies, and a user-friendly design. Its versatility, coupled with safety features and comfort, makes it an exceptional choice for any project, whether on a professional job site or at home. With its blend of power and efficiency, the MBX15 is truly a reliable partner for all your grinding and surface preparation needs.
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