English Part:

The angle grinder, a handheld power tool, utilizes a high-speed rotating abrasive disc or cutting wheel for grinding, cutting, polishing, and sanding. Its name derives from the 90-degree angle between the drive motor shaft and the spindle holding the disc. It has become an indispensable "Swiss Army knife" in modern industrial manufacturing, construction, metalworking, and even home DIY projects.

Core Features & Capabilities:

High Power & Speed: Equipped with powerful motors, often exceeding 10,000 RPM, delivering exceptional cutting and grinding force.

Extreme Versatility: By switching various attachments (grinding wheels, cutting discs, wire brushes, sanding discs, polishing pads), it performs diverse tasks:

Cutting: Metal pipes, rebar, tiles, stone, concrete (with specialized discs).

Grinding: Removing weld slag and burrs, smoothing welds, shaping metal, stone, or wood surfaces.

Rust/Paint Removal: Effectively stripping rust or old paint from metal surfaces using wire brush cups or wheels.

Polishing: Achieving a fine finish on metal or stone using wool pads and polishing compounds.

Maneuverability: Relatively compact size allows for flexible operation in tight or complex spaces.

Safety is Paramount:

Angle grinders are recognized as high-risk tools. Improper use can easily lead to severe injuries (flying debris, cuts, disc shattering, kickback, dust inhalation).

Essential PPE (Personal Protective Equipment): Safety glasses/goggles/face shield, cut-resistant gloves, respirator/dust mask, hearing protection, close-fitting clothing.

Secure Workpiece: Always clamp the workpiece firmly. Never hold small pieces by hand.

Correct Disc Selection & Installation: Inspect discs for cracks, ensure RPM rating matches the grinder, and mount securely using the correct flange and nut.

Mind Stance & Kickback: Grip firmly with both hands, stand balanced, stay out of the plane of the disc, be prepared for torque reaction on start-up or if the disc binds.

Maintain a Clear Workspace: Keep away from flammables, be mindful of the power cord location.

Pre-Use Check: Inspect the power cord, switch, and safety guard for damage.

After Use: Disconnect power, allow the disc to stop completely before setting the tool down.

Wide-Ranging Applications:

Metal Fabrication Shops (weld cleanup, material cutting)

Construction Sites (rebar cutting, concrete grooving, stone work)

Automotive Repair (exhaust pipe cutting, bodywork, rust removal)

Woodworking (hardwood carving, aggressive sanding - Extreme caution required, wood can be violently grabbed)

Home DIY (trimming garden metalwork, small renovation tasks)

Conclusion:

The angle grinder stands as a powerhouse of efficiency on the job site due to its formidable cutting/grinding capabilities and versatility. However, while "a worker must first sharpen his tools," "safety first" is the absolute imperative. Only through strict adherence to operating procedures, wearing comprehensive PPE, and maintaining constant vigilance can this powerful "workhorse" be harnessed safely and productively, mitigating its inherent dangers. It embodies raw power and speed, but its safe use relentlessly tests the operator's knowledge and responsibility.