Daily Use: 3 Don’ts Principles

Don’t overload: Avoid extending the lever arm of manual wrenches with pipes (prevents deformation); never use power tools to cut materials exceeding rated hardness (e.g., carbide with angle grinders) to protect motors from burnout.

• Don’t misuse: Never use screwdrivers as chisels or pliers to cut ultra-hard materials like steel bars (avoids blade chipping).

• Don’t neglect safety: Check power cords for damage before using power tools; regularly inspect insulation layers of insulated tools for aging—stop use immediately if issues arise.

Regular Maintenance: Category-Specific Tips

Hand Tools

• Wipe oil and metal shavings with a dry cloth after use to prevent corrosion.

• Add a small amount of oil to joints (e.g., pliers, adjustable wrenches) regularly for smooth operation.

• Apply anti-rust oil (especially on metal blades) and store in a dry toolbox when not in use for long periods (avoids humidity damage).

Power Tools

• Clean dust from the body after use to prevent motor overheating.

• Avoid overcharging battery-powered tools; keep 50% charge when unused for long and recharge periodically.

• Avoid excessive bending of power cords during storage to prevent internal wire damage.

Measuring Tools

• Prevent drops and collisions (protects precision).

• Clean measuring surfaces before use and store in dedicated cases after use.

• Calibrate regularly (e.g., levels, calipers) to ensure accuracy meets standards.

Scrap Standards: When to Replace Tools

• Hand Tools: Wrenches deformed by over 3% of original size, cracked plier jaws, severely worn screwdriver blades (unable to grip screws effectively).

• Power Tools: Abnormal motor noise, significant speed reduction, irreparable power cord damage.

• Measuring Tools: Accuracy errors exceeding nominal range (e.g., level bubble deviation, inaccurate caliper readings) that cannot be calibrated.