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Your Professional Power Tools Supplier

 

Danyang GM Tools Co., Ltd., located in Danyang City, Jiangsu Province, China, is a professional manufacturer of precision cutting tools. Our modern 8,000 m² factory is equipped with advanced CNC machines, precision grinders, and heat-treatment equipment. Our experienced team of engineers, production staff, and quality inspectors ensures high-quality manufacturing and strict quality control. We specialize in standard and customized twist drills, power tools, saws, and hand tools for industrial applications such as metalworking, machinery, automotive, and mold making. With an overseas plant in Malaysia, we support global customers by reducing import costs and ensuring timely delivery. We are committed to reliable, long-term partnerships.

 

 
 
Why Choose Us

Sales Market

Our products are exported to numerous regions—including the Americas, Europe, the Middle East, and Asia—where they have garnered widespread acclaim.

Our Certificate

ISO 9001, CE, and RoHS certified, with 100% quality guarantee and strict quality control processes.

OEM/ODM Capability

Customized solutions provided quickly by our dedicated engineering team according to client specifications.

Quality Assurance

We provide a 100% quality guarantee to our customers. Any quality issues are fully our responsibility, ensuring reliable and worry-free products.

 

21V Cordless Angle Grinder

Tackle tough grinding and cutting tasks with this 21V cordless angle grinder featuring a brushless motor for longer life and efficient performance. Equipped with a 125mm disc, it delivers precise and powerful cutting, grinding, and polishing. Comes complete with two rechargeable batteries and a charger for uninterrupted work. Lightweight and cordless, it offers easy handling and mobility for a wide range of projects.

 

Name

21V cordless angle grinder

Desc

1PC 21V cordless angle grinder machine

1PC adjustable handle

2PCS battery pack

1PC charger

Package

1set/plastic box. Accept OEM customer's brand and color package.

Brand

GMTOOL, GOLDMOON, BeHappy, B&T etc. We also accept custom customers' brands.

 

Features of 21V Cordless Angle Grinder
 

Powerful Performance

The 21V Angle Grinder delivers up to 8500RPM with a brushless motor, offering stable and powerful operation for grinding metal, descaling, and steel cutting.

Cordless Convenience

A 4000mAh battery capacity provides freedom from power cords, enabling flexible use for indoor decoration, outdoor construction, or home DIY projects.

Rapid Charging

Equipped with a 2A fast charger, the battery can be fully charged in just 2 hours, and a power display function allows for easy monitoring of remaining battery life.

Ergonomic Design

An adjustable 2-position auxiliary handle enhances control and comfort for both left-handed and right-handed users across various angles and materials.

Enhanced Durability

Dimensional vents ensure cool operation, protect the motor from overheating, and prevent dust ingress, thereby extending the machine's lifespan.

Versatile Applications

Compatible with various blades, discs, and grinding wheels, this tool is suitable for metal polishing, ceramic tile cutting, stone carving, woodworking, and industrial applications.

 

Types of 21V Cordless Angle Grinder

 
13 in 1 Multi-functions Cordless Power Tools Kit
  • Corded Angle Grinder

    Corded angle grinders operate using electricity from a power outlet.They provide continuous power and are commonly used in workshops and industrial environments.

  • Pneumatic Angle Grinder

    Pneumatic angle grinders use compressed air to operate.They are commonly used in industrial environments and automotive workshops.

  • Small Angle Grinder

    Small angle grinders usually have disc sizes between 4 to 5 inches.They are lightweight and suitable for light-duty tasks.

  • Large Angle Grinder

    Large angle grinders have disc sizes of 7 to 9 inches.They are used for heavy-duty cutting and grinding tasks.

 

Applications of 21V Cordless Angle Grinder
 

Woodworking
Pick a lightweight cordless angle grinder with sanding and grinding attachments. One with wood-cutting and carving discs as it will allow for precision work and shaping and detailing your wood projects.

 

Construction Work
With construction work, you’ll definitely need a high-performance cordless angle grinder, for example 18V or higher and 5–7-inch discs. You want your tool to be built for cutting, grinding, and polishing tough construction materials like steel, concrete, and stone. It needs to stand the test of time and demanding environment!

 

Jewelry Making
This type of work requires compact and low-power cordless angle grinder such as 12V or small 18V models, preferably one that comes with precision accessories. This allows you to do fine grinding and polishing for delicate materials.

 

Automotive Repair
Mid-range cordless angle grinders, like 4.5-inch ones, with variable speed control would be ideal for any automotive work you might have. This type is great when it comes to cutting exhaust pipes, grinding metal parts, and smoothing surfaces in tight spaces, making your job a lot easier.

 

Masonry Tasks
Masonry tasks call for all the high-power tools and cordless angle grinders are no exception! Choose one with diamond blades, as it will be effective for cutting stone, tiles, and bricks. Additionally, opt for models with high RPMs.

 

DIY Projects or Home Improvement Tasks
If you do any DIY work around the house or your workshop, a versatile cordless angle grinder with variable speed and accessory compatibility is your best way to go.

 

 
Components of 21V Cordless Angle Grinder
 
01/

Electric Motor
The motor is the main component that generates rotational power.

02/

Gearbox
The gearbox changes the direction of rotation and increases torque.

03/

Spindle
The spindle holds the grinding or cutting disc in place.

04/

Grinding Disc or Wheel
This is the main working part that performs cutting or grinding.

05/

Protective Guard
The guard protects the user from sparks and debris during operation.

06/

Power Switch
The switch controls the operation of the grinder.

 

How to Choose the 21V Cordless Angle Grinder

 

Disc Size

Common disc sizes include 4-inch, 5-inch, 7-inch, and 9-inch grinders.
Small discs are suitable for light work, while large discs are used for heavy-duty tasks.

01

Motor Power

Higher motor power allows the grinder to handle tougher materials.

02

Speed Rating

Higher RPM provides faster cutting and grinding performance.

03

Corded vs Cordless

Corded grinders provide continuous power, while cordless grinders offer portability.

04

Safety Features

Choose grinders with safety guards, anti-vibration handles, and overload protection.

05

 

How to Use 21V Cordless Angle Grinder

 
Step 1: Charge the Battery

Before starting any work, ensure your angle grinder's battery is fully charged. Consult the user manual for instructions on how to charge the battery accurately. Depleting the battery can result in interruptions and possible safety risks.

Step 2: Put on The Right Wheel Or Attachment

Grinding: A grinding wheel is made of aluminum oxide or zirconia. It suits most metals, while a diamond grinding wheel is a good choice for cutting concrete.
Cutting: A masonry blade can cut concrete and brick. Subsequently, a cut-off wheel effectively cuts through metal.
Polishing: Choose a polishing pad and recommended compound following your object requirements. Remember to attach the correct wheel according to the manufacturer's instructions.

Step 3: Secure The Material

Clamp or secure down the material you will be working on where possible so it doesn't move. Securing the material prevents it from moving and reduces the chances of accidents. Use adequate supports or work benches for larger pieces.

Step 4: Power On The Grinder

Turn on the angle grinder following instructions from the manufacturer. Ensure your grip on the handle of the tool is firm before starting.

Step 5: Start Grinding, Cutting, or Polishing

Grinding: Maintain constant pressure while moving the grinder in one smooth, controlled motion. Avoid applying too much force, as this can cause the wheel to bind and kick back.
Cutting: Let the wheel do the job; make slow, deliberate cuts. Try to avoid pushing through with force using a grinder.
Polishing: Apply moderate pressure in a circular motion. Overlapping passes may achieve consistent finishings.Wear proper protective gear all the time you operate the tool.

Step 6: Monitor your Progress and Make necessary Adjustments

Periodically inspect the workpiece and the condition of the wheel or attachment. If necessary, adjust speed, pressure, or angle based on the material you are working with and the desired finish. Take breaks if you face overheating issues.

Step 7: Power off and Remove Debris

Ensure the grinder is turned off and has completely stopped before setting it down. Approach any debris on the work or around it with care.

Step 8: Clean, Store Tool

Wipe the angle grinder's outer surface using a damp cloth. Remove dust or dirt from air vents. Store the tool in a dry place away from children's reach.

 

Safety & Tips

 

 

Eyewear Protection

Always wear ANSI-approved safety goggles or a full-face shield to protect against sparks, metal shards, and abrasive particles that can cause serious eye injuries.

 

Respiratory Protection

Use an N95-rated dust mask or respirator when grinding materials like concrete, stone, or painted metal to avoid inhaling harmful silica dust or toxic fumes.

 

Hand and Skin Protection

Wear heavy-duty gloves made of cut-resistant material to guard against sharp edges and heat generated during grinding.

 

Hearing Protection

Prolonged exposure to the loud noise (often exceeding 85 dB) can damage hearing—earplugs or earmuffs are recommended, especially in enclosed spaces.

 

Secure Work Area

Clamp down materials whenever possible, ensure the workspace is well-lit and free of flammable substances, and keep bystanders at a safe distance.

 

Tool Inspection

Check the grinder’s guard, handle, and power cord before use. Never operate a grinder with a cracked or damaged wheel.

 

 

FAQ

 

Q: Can I buy 1-2 items?

A: We don't do retail sale, only wholesale.

Q: How to order sample?

A: Samples are available, and while sample costs, including the air delivery fee, are required upfront, they are eligible for a refund upon the placement of the first order.

Q: How long is expected for the sampling process?

A: Typically, it takes up to two weeks, excluding holidays.

Q: How is your product?

A: We are focus on high-performance power tool only, and mainly cordless tool.

Q: How long is expected for the production process?

A: Typically, it takes up to 14 days for the stock items. Or up to 45 days for new production, excluding holidays.

Q: Which payment methods are accepted?

A: T/T, L/C, D/P, or as negotiated.

Q: Can I use my logo or design on the product?

A: Yes, we offer OEM/ODM services. Your logo and design can be made on the product.We can also customise the body color, battery brand and other product content according to your needs.

We're well-known as one of the leading power tools manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality power tools made in China here from our factory. Contact us for free sample.

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