The SMT-8522-B Professional Angle Grinder is a compact yet powerful grinding machine designed for professional metalworking, fabrication, construction, and home workshop applications. Built with an 850W high-performance motor and operating at 11,000 RPM, this grinder delivers fast cutting, smooth grinding, and reliable polishing performance for demanding tasks.

Whether you are cutting steel pipes, smoothing weld joints, removing rust, or shaping masonry surfaces, the SMT-8522-B provides the balance of power, precision, and durability needed for professional results.

Technical Specifications

Feature	Specification
Model	SMT-8522-B
Motor Power	850W
No-Load Speed	11,000 RPM
Disc Size	100mm (4 Inch)
Spindle Thread	M10
Bore Size	16mm
Voltage	220V–240V
Weight	2.2kg
Application	Cutting, Grinding, Polishing

Powerful 850W Motor Performance

The SMT-8522-B features a heavy-duty 850W copper motor engineered for continuous performance under load.

The motor delivers:

• Stable cutting power
• High torque output
• Smooth grinding operation
• Reduced speed drop during heavy work

Unlike low-quality grinders that lose RPM under pressure, the SMT-8522-B maintains consistent speed for clean and efficient cutting.

Its high rotational speed of:

$11000\text{ RPM}$11000 RPM

allows rapid material removal and faster job completion.

Compact and Ergonomic Design

Power tools must remain comfortable during long working hours. The SMT-8522-B is designed with an ergonomic grip and balanced body structure to reduce fatigue.

Key Ergonomic Benefits

• Lightweight 2.2kg body
• Comfortable side handle
• Better vibration control
• Improved cutting stability
• Easy one-handed operation

The slim housing improves grip strength and precision during detailed work.

Applications of the SMT-8522-B

Metal Cutting

The grinder easily cuts:

• Steel pipes
• Rebar
• Angle iron
• Sheet metal
• Steel rods

The high-speed disc rotation ensures clean and quick cuts.

Weld Grinding

Fabricators can use the grinder to:

• Smooth weld seams
• Remove slag
• Prepare metal surfaces
• Shape steel components

Rust and Paint Removal

Attach a wire brush wheel to:

• Remove corrosion
• Strip old paint
• Clean metal surfaces
• Prepare materials for repainting

Masonry and Tile Work

The SMT-8522-B can also grind:

• Brick edges
• Concrete surfaces
• Ceramic tiles
• Stone materials

Universal Disc Compatibility

The SMT-8522-B uses a standard:

$100\text{ mm}=4\text{ inch}$100 mm=4 inch

disc size with an M10 spindle thread.

This allows compatibility with:

• Cutting discs
• Grinding wheels
• Flap discs
• Wire brushes
• Polishing pads

Changing accessories is quick and simple.

Safety Features

Safety is critical when operating high-speed power tools.

The SMT-8522-B includes:

• Protective wheel guard
• Heat-resistant housing
• Side support handle
• Stable spindle locking system

Safety Tips

• Always wear safety goggles
• Use gloves during grinding
• Check discs for cracks before use
• Never exceed disc speed ratings
• Disconnect power before changing accessories

Step-by-Step Operating Guide

Step 1 – Install the Disc

1. Unplug the grinder
2. Press the spindle lock button
3. Loosen the flange nut
4. Install the cutting or grinding disc
5. Tighten securely using the wrench

Step 2 – Secure the Material

Clamp the workpiece firmly before operation.

Loose material can:

• Shift during cutting
• Damage the disc
• Cause kickback

Step 3 – Start the Grinder

• Hold the grinder firmly with both hands
• Start the machine before touching the surface
• Allow full speed before cutting

Step 4 – Perform the Cut

Move steadily without forcing the tool.

Excessive pressure can:

• Overheat the motor
• Damage the disc
• Produce rough cuts

Let the disc do the work naturally.

Advantages of the SMT-8522-B

High-Speed Cutting

The 11,000 RPM motor provides fast and smooth performance.

Lightweight Construction

At only:

$2.2\text{ kg}$2.2 kg

the grinder remains easy to control during extended work sessions.

Durable Internal Components

The SMT-8522-B uses:

• Heat-resistant materials
• Strong gear systems
• Durable motor windings

This improves tool lifespan under heavy workloads.

Easy Accessory Availability

Replacement items are widely available, including:

• Carbon brushes
• Guards
• Flanges
• Side handles
• Grinding discs

Preventive Maintenance Guide

Proper maintenance increases performance and extends motor life.

Clean Dust Regularly

Use compressed air to clean:

• Cooling vents
• Gear housing
• Motor openings

Dust buildup causes overheating.

Check Carbon Brushes

Inspect brushes after heavy use.

Replace them if:

• Sparks increase
• Power decreases
• Brush length becomes too short

Inspect Grinding Discs

Never use:

• Cracked discs
• Bent wheels
• Worn-out accessories

Damaged discs can break at high RPM.

Common Problems and Solutions

Grinder Overheats

Causes

• Heavy pressure
• Blocked air vents
• Dull discs

Solution

• Reduce force
• Clean ventilation openings
• Replace old discs

Excessive Vibration

Causes

• Bent disc
• Loose flange
• Worn bearings

Solution

• Replace the disc
• Tighten the flange
• Service the bearings

Sparks Inside Motor

Causes

• Worn carbon brushes
• Dirty commutator

Solution

• Replace brushes
• Clean internal motor components

Ideal Users for the SMT-8522-B

This grinder is perfect for:

• Welders
• Steel fabricators
• Construction workers
• Workshop mechanics
• DIY users
• Tile installers
• Metalworking professionals

Buying Guide

Choose the SMT-8522-B if you need:

• A lightweight grinder
• Fast cutting performance
• Reliable workshop operation
• Affordable professional quality

Avoid smaller low-power grinders if you frequently work with:

• Thick steel
• Continuous grinding jobs
• Heavy fabrication work

Frequently Asked Questions

What disc size does the SMT-8522-B support?

The grinder supports 100mm (4-inch) discs.

Can it cut steel?

Yes. It is designed for steel cutting, grinding, and polishing applications.

Is the grinder suitable for masonry?

Yes. It can grind brick, tile, and concrete surfaces using proper masonry discs.

Does it support polishing wheels?

Yes. The M10 spindle supports polishing and buffing accessories.

Is it suitable for professional workshops?

Yes. The 850W motor and durable construction make it suitable for professional daily use.

Conclusion

The SMT-8522-B Professional Angle Grinder combines compact handling, strong cutting power, and reliable durability in one professional-grade machine. Its 850W motor, 11,000 RPM speed, and ergonomic body make it ideal for metalworking, construction, fabrication, and maintenance tasks.

From cutting steel to polishing surfaces, the SMT-8522-B delivers dependable performance while remaining lightweight and easy to control. With proper maintenance and safe operation, this grinder becomes a valuable long-term addition to any professional or home workshop.