I. Core Advantages: Lithium Battery Power + Multifunctional Integration, Reconstructing Grinding Efficiency

1. Cordless Portable Design, Freeing You from Scenarios
Equipped with a single/dual 6.0Ah-10.0Ah high-capacity lithium iron phosphate battery, supporting hot-swappable alternating use, completely eliminating the cable drag of traditional corded grinders and the air source dependence of pneumatic grinders. Suitable for indoor decoration, outdoor maintenance, high-altitude operations, and field emergencies where there is no power supply; the body is made of high-strength lightweight engineering plastic and aluminum alloy composite material, with a total weight of only 1.5-3.5kg, which is more than 50% lighter than traditional corded grinders (3-6kg). It can be operated with one hand, and with the foldable handle design, the volume is reduced by 30% when stored, making it easy to put into a tool bag or car trunk, making it flexible and burden-free to carry. 2. Multifunctional Integration, Adaptable to Grinding of Multiple Materials The core power unit uses a 500W-1200W high-power brushless motor with a speed of 8000-20000r/min, supporting multiple speed settings (3-5 levels). Equipped with interchangeable grinding heads (diamond discs, sandpaper discs, wire wheels, polishing wheels, cutting discs, etc.), it can precisely handle various needs such as metal rust removal, wood grinding, stone polishing, wall renovation, weld treatment, and burr removal. It is compatible with materials including steel, aluminum alloy, wood, stone, tiles, plastics, and paint, completing the entire process of "grinding-polishing-cutting-rust removal" without changing equipment. Compared to single-function grinders, it improves work efficiency by over 60%, meeting one-stop needs for multiple scenarios. 3. Balancing battery life and efficiency to meet high-intensity work requirements. A single fully charged battery can provide 1.5-4 hours of continuous operation (adjustable depending on the power level and the material being polished), while dual batteries can provide 4-8 hours of continuous operation, meeting the high-intensity needs of daily DIY projects, renovation work, and repair workshops. Equipped with 45-60 minute fast charging technology, it quickly restores full charge after a power outage, avoiding work interruptions. Compared to manual polishing, efficiency is increased by 8-10 times. For example, renovating a 10㎡ wall only takes 30 minutes, and rust removal from a 1㎡ metal workpiece only takes 15 minutes, significantly reducing work time. II. Technical Highlights: Professional Configuration Solidifies Grinding Operation Advantages

1. Grinding System Design Adaptable to Multiple Material Characteristics
Grinding Head Technology: Equipped with a quick-release grinding head interface, grinding head replacement can be completed in 10 seconds without additional tools; diamond grinding discs are suitable for grinding and polishing stone and tiles, with a hardness of HRC65 or higher, and a single disc can work continuously for 50-80 hours; sandpaper discs support different grit specifications from 80-240 grits, suitable for coarse and fine grinding of wood; steel wire wheels are used for rust and paint removal on metals, with strong toughness and not easy to break wires; polishing wheels are made of wool/sponge material, suitable for mirror polishing of painted and metal surfaces. Speed ​​Adjustment and Anti-vibration: Built-in electronic speed control system allows for precise adjustment of the rotation speed according to polishing needs (low setting 8000-12000r/min for fine polishing, high setting 15000-20000r/min for heavy-duty polishing/cutting); the machine body integrates a shock-absorbing and buffering structure, reducing hand vibration transmission by 40%, preventing hand numbness caused by prolonged work, and improving operating comfort.
2. Lithium Battery and Safety Protection for Complex Working Conditions
Battery Performance: Lithium iron phosphate battery with a cycle life of ≥1500 cycles, supporting stable operation in environments from -20℃ to 45℃, excellent vibration and impact resistance (can withstand bumps and collisions within the tool bag); IPX4 waterproof rating prevents dust and water from seeping in and damaging the battery during operation, suitable for humid and dusty environments. Multiple Protections: Equipped with overload protection (automatic shutdown when load exceeds 120% of rated value), over-temperature protection (alarm when motor temperature ≥70℃), accidental touch protection (dual start of safety lock + trigger), and dustproof protection (sealed body design) – a quadruple safety mechanism; the grinding head is equipped with a transparent protective cover to block dust and debris splashes, protecting the operator's eyes. 3. Humanized and Intelligent Design for Enhanced Ease of Operation: Ergonomics: Features a curved, non-slip grip (soft rubber material + non-slip texture) that fits comfortably in the hand, reducing fatigue during extended use; some models support handle angle adjustment (0°-90°) to adapt to different working angles such as flat surfaces, corners, and crevices; the machine's weight is balanced, with the center of gravity close to the grip area, ensuring no deviation during one-handed operation. Intelligent Monitoring: The LCD high-definition display shows real-time parameters such as remaining battery power (percentage), current speed setting, and cumulative working time, providing a clear overview. Some high-end models support Bluetooth connection to a mobile app, allowing users to set preset speeds, view fault alerts, and record work data, facilitating management by professional construction teams. III. Typical Application Scenarios: Focusing on Sanding Needs in Multiple Fields

1. Home DIY and Renovation
Suitable for furniture sanding and painting, wall putty sanding, floor renovation, rust removal from door and window frames, and tile grout polishing. The lightweight design for home use requires no professional skills, making it easy for ordinary residents to operate. With different grinding heads, it can complete the entire process from coarse sanding to fine polishing, making home renovation more efficient and convenient.
2. Auto Repair and Detailing
Used for repairing scratches on car paint, sanding bumpers, removing rust from the chassis, and polishing wheels. The cordless design allows for flexible movement to any part of the vehicle, and its low-vibration characteristics prevent damage to the original paint. With a dedicated polishing wheel, it can achieve a mirror-like polishing effect, comparable to professional auto detailing shops. 3. Industrial Processing and Manufacturing: Suitable for deburring metal workpieces, grinding welds, polishing castings, rust removal from hardware accessories, and trimming plastic parts in machining. Multiple speed settings meet different needs for roughing and finishing. Compared to traditional benchtop grinders, it is highly portable and suitable for mobile workshop operations or localized grinding of large equipment.
4. Construction and Decoration Engineering: Used for polishing stone walls/floors, grinding and leveling concrete surfaces, cutting and chamfering tiles, and removing rust from pipes. Its compact design allows it to reach into confined spaces (such as corners and pipe gaps). The dustproof design is suitable for dusty construction environments, improving safety and comfort.
5. Emergency Repair and Outdoor Operations: Addresses scenarios such as rust removal from outdoor equipment, grinding billboard frames, sharpening garden tools, and emergency cutting in the field. The cordless design eliminates the need for an external power source, and dual batteries ensure continuous operation, making it a practical tool for outdoor repair and emergency rescue operations. IV. Purchasing Guide: Choose a Multifunctional Grinding Machine Based on Your Needs

1. Priority of Core Parameters (Sorted by Importance)

Motor Power: 500-800W for home DIY, 800-1200W for industrial processing/heavy-duty grinding;
Battery Configuration: Prioritize dual 6.0Ah or higher capacity, supporting fast charging and low-temperature adaptability (operable at -20℃). For frequent outdoor work, a dual-battery kit is recommended;
Grinding Head Compatibility: Choose models that support multiple grinding head sizes (100-180mm diameter) and quick-release interfaces to ensure accessory compatibility;
Speed ​​Adjustment: At least 3 speed settings (8000-20000r/min) to meet the grinding needs of different materials;
Protection Rating: At least IP54 protection. For dusty or humid environments, an upgraded IP65 model is recommended;
Additional Functions: Prioritize models with shock-absorbing grips and LCD screens. Models with adjustable displays and protective covers enhance operational comfort and safety. 2. Brand and Scenarios Matching Recommendations
Industrial Grade First Choice (Workshop Processing, Professional Construction):
Bosch (GWS 18V-EC 150): Industrial-grade quality, powerful, wide grinding head compatibility, IP55 protection rating, supports professional grinding needs;
Makita (DGA452Z): High energy efficiency of brushless motor, stable battery life, excellent shock absorption design, suitable for long-term continuous operation;
Cost-Effective Choice (Home Use, Repair Shops, Renovation Teams):
Dayou (5401): High multi-functionality integration, strong battery versatility, affordable accessories, suitable for multiple scenarios;
Dongcheng (DCSM02-100): Simple and easy to operate, extensive after-sales service network, convenient maintenance, suitable for beginners and daily use;
Key Points for Selecting Niche Brands: Must provide a battery warranty of ≥2 years and a motor warranty of ≥1 year. Prioritize brands that can provide grinding head accessories and support 7-day no-reason return policy to ensure a good user experience. V. Usage and Maintenance Techniques: Extending Equipment Lifespan and Ensuring Operational Safety

1. Correct Usage Guidelines

Preparation Before Operation:

Clean up debris in the work area, ensuring the grinding surface is free of oil and water to prevent slippage or affecting the grinding effect;

Check battery power (≥50%), motor operating status (no abnormal noise), and the tightness of the grinding head installation. Select the appropriate grinding head according to the material being ground (wire wheel/diamond disc for metal, sandpaper disc for wood, wool wheel for polishing);

Adjust to the appropriate speed setting. Use a high setting for coarse grinding/cutting and a low setting for fine polishing to avoid damaging the workpiece due to excessive speed. Operating Procedures: Press the safety lock + trigger to start the equipment. First, test grind on scrap material or the edge of the workpiece to confirm the grinding effect before commencing formal operation. Keep the grinding head perpendicular to the working surface (for flat surface grinding) or at a 45° angle (for rust removal and edge trimming). Move the equipment at a uniform speed to avoid prolonged idling in one area, which could lead to overheating or workpiece damage. After every 30 minutes of continuous operation, stop the machine for 5 minutes to allow it to cool down. Clean the dust and debris adhering to the grinding head surface to prevent jamming. When changing between two batteries, turn off the power and wait until the grinding head has completely stopped before operating. Safety Precautions: Wear safety goggles (to protect against dust and flying debris), a dust mask (to prevent inhaling dust), and cut-resistant gloves (to prevent scratches from the grinding head). Long hair must be tied up to prevent it from getting caught in the grinding head. Never grind flammable or explosive materials (such as paint buckets or gasoline cans) to avoid generating sparks and causing danger. Keep away from children and unauthorized personnel while working. Avoid grinding directly in front of yourself or others to prevent injury from flying debris. When working at heights, wear a safety belt and attach a safety rope to the equipment to prevent falls. 2. Daily Maintenance Points
Grinding Head and Grinding System Maintenance:
After operation, promptly clean the dust and debris from the grinding head surface and wipe it dry with a clean cloth to prevent accumulation that could affect the next use;
When the grinding head shows severe wear (sandpaper disc frayed, wire wheel broken, diamond grinding disc dulled) or a significant decrease in grinding efficiency, replace the grinding head promptly to avoid motor overload due to grinding head dulling;
Check the connection between the grinding head interface and the drive shaft weekly, tighten any loose screws, and add special grease to prevent damage from dry grinding. Battery Maintenance: After operation, remove the battery and store it in a dry, ventilated environment (temperature 0-30℃), avoiding storage with metal objects (to prevent short circuits); If not used for an extended period (more than 1 month), fully charge the battery before storage, and recharge it every 2 months (maintaining a charge level of 50%-80%); Do not charge in high-temperature (≥50℃) or low-temperature (≤-10℃) environments. Before charging, ensure the battery interface is dry and clean to avoid dust and water stains that could cause short circuits. Machine Body and Control System: After operation, use compressed air to blow away the heat dissipation vents and protective cover of the machine body to remove dust accumulation; wipe the display screen and operation buttons with a dry cloth to prevent dust from entering and damaging electronic components; Check the wear of the motor carbon brushes monthly (replace when wear exceeds 1/2), test the safety protection functions to ensure that overload and over-temperature protection are effective; Regular Calibration: Calibrate the speed range accuracy every 3 months (contact the brand's after-sales service or a third-party organization to ensure that the speed is consistent with the display; Conduct a comprehensive inspection annually (motor power, battery capacity, grinding head concentricity) to ensure that the equipment meets operating standards.