High-Quality and High-Efficiency Angle Grinder Supplier

BOSI Tools is an angle grinder supplier from China, offering Angle Grinding Machines and the Black Warrior Series Angle Grinding Machines. Equipped with durable imported NSK, NMB, and TPI bearings, and ranging from a 720W slim-body model to a 1600W heavy-duty grinding machine, BOSI delivers enduring grinding power for industries such as foundry, shipbuilding, and metal polishing through high-precision bearing configurations and complete power spectrum coverage.

We can provide selection advice and customized solutions based on actual working conditions. Please feel free to contact us at any time.

What Is an Angle Grinder?

An angle grinder, fully known as an angle grinding machine, is a portable power tool that uses a motor to drive a bevel gear set to change the power direction, causing the output shaft to rotate at high speed. Its core structure consists of a motor, an angular reduction gearbox, an output spindle, and a protective guard.

The motor rotor meshes a small bevel gear with a large bevel gear, converting axial rotation into radial rotation of the output shaft, thereby driving the grinding disc, cutting disc, or polishing disc mounted on the spindle to rotate at high speed, performing grinding, cutting, and polishing on materials such as metal and stone.

BOSI angle grinders cover a power range from 720W to 1600W. Among them, the "Grinding King" 1600W high-speed model specializes in efficient grinding and polishing, while the "Cutting King" 1600W low-speed model focuses on deep cutting, meeting differentiated operational needs through different tuning of speed and torque.

The Black Warrior Cool Series combines a stylish appearance with balanced power for versatile general use, while the 10A class 180mm/230mm heavy-duty models, with 3800W overload capacity, tackle continuous high-intensity working conditions in foundries and shipyards.

In short, an angle grinder converts the motor's high-speed rotation into powerful kinetic energy for the grinding and cutting disc, making it an indispensable grinding tool in the metal processing field.

Our Angle Grinder Products vs. Other Brands: Why Choose BOSI?

Compared to angle grinders in the same price range on the market, BOSI creates a significant distinction in its core bearing configuration. The entire high-end series uses imported NSK, NMB, and TPI bearings—all leading global bearing brands—whose precision and durability far exceed the low-grade domestic bearings used by generic brands, directly determining the tool's stability at high speeds and its overall service life.

In terms of power, BOSI covers the spectrum from 720W to 1600W, with the 180mm and 230mm models possessing a 3800W overload capacity, preventing slowdowns or shutdowns due to instantaneous resistance during heavy-duty grinding and cutting. In contrast, most competitors at the same price point either severely inflate their power ratings or lack overload margin, struggling once they encounter hard materials.

In details, BOSI offers two control options—a side switch and a rear switch—for users to choose from, catering to different grip habits and safety needs; and the "Slim Waist" series with its slender body is optimized for one-handed, extended operation, with noticeably less grip fatigue than thicker-bodied models.

In terms of wear and impact resistance, BOSI housings are robustly built, allowing work to continue even after accidental drops on construction sites. Obtaining an imported-grade bearing configuration and reliable overload protection at an accessible price is the core appeal of BOSI angle grinders compared to competitors.

Common Problems During Angle Grinder Operation and Solutions

What Materials Can Be Processed?

The materials compatible with BOSI angle grinders cover both metallic and non-metallic domains, specifically including:

Carbon Steel and Cast Iron

Grinding welding spatter, weld seam leveling, steel surface rust removal, cast iron burr removal. Models of 1100W and above, paired with resin grinding discs, are recommended for efficient excess material removal without damaging the base material.

Stainless Steel

Thin sheet cutting and weld seam polishing. It is recommended to use dedicated stainless steel cutting discs; the BOSI 1600W "Cutting King" with its low speed of 8200 r/min reduces heat discoloration and keeps the cut edge clean.

Non-Ferrous Metals (Aluminum/Copper)

Flashing and burr removal from blank parts. Non-ferrous metal-specific grinding discs must be used to prevent clogging of standard discs; entry-level 720W/880W models can handle light-duty tasks.

Stone and Ceramic Tiles

Stone cutting, ceramic tile chamfering and edging. Requires replacing the blade with a diamond cutting disc; 10A class large models have strong overload capacity, suitable for thick stone.

Ship and Foundry Components

Hull steel plate rust removal, gate grinding on castings. 180mm/230mm heavy-duty models paired with reinforced grinding discs; their robust overload capacity supports continuous high-intensity operation.

Automotive Sheet Metal and Repair

Sheet metal part cutting, weld spot grinding, old paint removal. The 100mm angle grinder is flexible and compact; the Black Warrior Series has a high-recognition appearance, suitable for multi-scenario use in a repair workshop.

Safety Precautions for Use

Safety must be the top priority when operating an angle grinder. The following precautions must be strictly observed:

Wear Full Personal Protective Equipment

During operation, safety goggles, a dust mask, and cut-resistant gloves must be worn simultaneously. The sparks generated are at an extremely high temperature; keep away from flammable materials and ensure no one is in the direction of operation.

Installation Inspection

Before each use, always confirm that the grinding disc is free of cracks or moisture. A soft spacer must be placed between the disc and the flange during installation. Do not overtighten the securing nut, as this may crack the disc. The rated speed of the grinding disc must be higher than the tool's no-load speed.

Maintain Correct Posture and Technique

Hold the tool with both hands. After starting, let it run idle for 30 seconds to confirm there is no abnormal vibration. When grinding, maintain a 15°-30° working angle and apply even pressure; when cutting, do not apply lateral force or use a grinding disc as a substitute for a cutting disc. During cutting operations, position your body out of the plane of the cutting disc to prevent kickback injury. Never use an angle grinder without its protective guard.

Pay Attention to the Working Environment

Exercise double caution when working in damp conditions or at heights. Where necessary, install a leakage protector. Never direct the rotation plane of the grinding disc towards the power cord to prevent cutting the cable.

Equipment Maintenance

After work, disconnect the power first and wait until the grinding disc has completely stopped rotating before putting down the tool. Regularly clean the ventilation slots and check the carbon brush wear. Always keep the tool dry and clean. When using a new grinding disc for the first time, it is recommended to let it run idle for over one minute to confirm there are no abnormalities before starting work.