Power tools detail: Angle grinder

Angular grinding machine (referred to as Angle grinding machine) is a multi-functional power tool, its main uses include: 1. Cleaning, hair removal and sanding of metal parts: the Angle Grinder can be used for grinding the weld, removing welding defects, cleaning welding roots, etc., with high speed, fast speed of removing defects, and beautiful cleaning of polishing welds. It can be used to polish the metal surface, create a variety of precision snow pattern, silk, wavy, matte, mirror and other effects, quickly repair deep scratches and slight scratches.
2. Metal cutting: The Angle grinder can be used as a small portable grinding wheel cutting machine after being installed with the grinding wheel blade, which is suitable for cutting and polishing small metal parts. In the field of metal processing, such as stainless steel anti-theft Windows, light box production, etc., the Angle grinder is an indispensable tool.
3. Stone processing: Angle mill is also widely used in stone processing and installation, can install marble cutting sheet, polishing sheet, wool wheel and a series of accessories, cutting, grinding, polishing and other operations.
4. Other uses: Angle grinding machine can also be used for wood, furniture industry sanding drawing, hardware materials and products surface treatment, electronic parts, electronic equipment flat sanding drawing and so on.
In summary, the Angle grinder is a kind of efficient tool for metal cleaning, hair removal, sanding and cutting and other operations, its wide range of applications, is one of the indispensable power tools in the industrial and DIY field.
The specifications of the electric angular polishing machine are expressed according to the maximum diameter of the grinding wheel used, with ϕ100mm, ϕ125mm, ϕ150mm, ϕ180mm, ϕ230mm.
The angular polishing machine below 125mm is mostly straight cylinder type, and the angular polishing machine above 125mm is mostly rear handle type, and is equipped with auxiliary handle.

Accessories available for angular polishing machine:
1. Slicing: The angular polishing machine can use slicing for cutting, which is suitable for cutting various metals, stainless steel, alloys and other materials.
2. Grinding plate: used for metal surface grinding treatment, can produce a variety of precision snow pattern, silk, wave, matte, mirror and other effects.
3. Blade: blade is mainly used for stainless steel and plastic grinding processing, with complex surface welding, deburring, rust removal and other effects, widely used in machinery, light industry, wood products, furniture, hardware, plastic, textile and other industries grinding and polishing.
4. Diamond blade: Diamond saw blade is suitable for cutting hard materials, such as stone, concrete, etc.
5. Alloy saw blade: used to cut hard materials such as metal.
6. Wire wheel: Wire wheel brush can be used to remove rust and old paint on the metal surface.
7. Polishing wheel: used for polishing metal surface, can be used to create different surface effects.
8. Rubber wheels: Rubber wheels can be used for soft polishing operations, suitable for some surface treatments that need to avoid scratches.
9. Rubber back pad: Used with sandpaper to provide a more flexible grinding method.
10. Sandpaper: Sandpaper can be installed on the rubber backing for sanding and polishing operations.
Soft grinding wheel should be selected when processing hard materials, and hard grinding wheel should be selected when processing soft materials.

Precautions for using the Angle grinder
1. Maintain the appropriate Angle: the rotating plane of the working head and the surface of the sand mill should be maintained at an oblique Angle of 15° ~ 35° to obtain the best rough grinding effect. Press the tool lightly, moving it back and forth to avoid overheating and dents.
2. Cut correctly: Do not press, tilt or shake the tool when cutting. The direction of the pushing tool should be opposite to the steering of the Angle grinder to avoid pushing along the steering so as not to lose control.
3. Avoid dangerous cutting: cutting the wire may cause fire and electric shock, cutting the gas pipe may cause explosion, cutting the water pipe or heating pipe may cause electric shock.
4. Personal protective equipment: The use of Angle mills must be equipped with a protective cover, and wear goggles, ear muffs, work gloves and strong footwear, preferably also wear a work apron.
5. Check the grinding (cutting) wheel: After the grinding (cutting) wheel is broken, it is necessary to remove all debris first, and then test whether the Angle grinder can operate normally to prevent damage caused by debris splashing.
6. Keep clean and ventilated: keep the Angle grinder and air vent clean to ensure work safety. When processing metal materials, conductive dust may accumulate inside the Angle mill, affecting the insulation performance. Use suction devices, increase the number of times to clean the ventilation holes, and use residual current circuit breakers.
7. Dry cutting stone: Angle grinder is only suitable for dry cutting and grinding. When cutting extremely hard materials, the saw blade can be damaged by overheating. If there is a spark ring around the saw blade, it means that the material is hard and the saw blade is super-charged. At this point, the cutting should be stopped and the saw blade should be idled to cool down. If the saw blade becomes dull, it can be cut back and forth across the abrasive material to restore sharpness. When processing stone, qualified stone dust suction device must be used.
8. Avoid processing asbestos-containing materials: Angle mill can not process asbestos-containing materials.
9. Power line position: Adjust the position of the Angle mill to ensure that the power line is always located behind the Angle mill during processing.
10. Avoid burns: Do not touch the workpiece with your hand immediately after grinding, so as to avoid burns caused by overheating.
11. Idling check: Let the grinding wheel idling for a while before use, observe the vibration or swing situation, and confirm whether the Angle mill is in a state of eccentric imbalance.
12. Replace the grinding wheel: When the diameter of the grinding wheel is worn to 60% of the original diameter, new products should be replaced to avoid the breakage of the grinding wheel.

13. Deal with the stuck situation: if the grinding (cutting) wheel is stuck during the operation, it will rebound, and the power switch must be turned off immediately to stop the Angle grinder. When abnormal vibration, sound, high temperature or odor is found, first cut off the power supply and send it to the professional repair center for inspection and repair.
14. Wait for complete stop: After cutting off the power supply, wait for the grinding wheel to stop completely before putting it down, so as not to cause danger.
15. Prevent the grinding wheel from bursting: avoid the grinding wheel from colliding with the workpiece during operation, and prevent the grinding wheel from bursting fragments from harming the user. Common faults and elimination of the main parts of the Angle mill replacement when the external splint can not be loosened with a special wrench, the following methods can be used:
1. Use a small punch: Find a small punch, top the eye of the outer splint, make sure that the length of the small punch is short enough so that the force of the hammer can be effectively transmitted to the outer splint.
2. Counterclockwise impact: Tap the small punch with a hammer in the counterclockwise direction, generally this can make the external splint loose. This operation requires a certain amount of skill to ensure that the force is transmitted properly and to avoid damage to the tool.
3. Choose the right small punch: The small punch can use an old piece of the needle of the nail gun, or other similar short but strong tool.
4. Control the strength: When hitting the small punch, it is necessary to control the strength and force should be moderate. Excessive force may damage the head housing of the angular polisher, causing unnecessary equipment damage.
5. Safe operation: When performing the above operations, ensure that the angular polishing machine has been powered off and is in a safe state. At the same time, the operator should wear appropriate personal protective equipment, such as goggles and gloves, to prevent accidental injury.
6. Check the condition of the tool: Before and after trying to loosen the outer splint, the head shell and the outer splint of the angular polishing machine should be checked for cracks or other damage to ensure the safe use of the tool.
7. Professional maintenance: If the above methods cannot solve the problem, or if there is any uncertainty during the operation, it is recommended to contact professional maintenance personnel for inspection and maintenance to ensure the correct maintenance of safety and tools.