Setup: Tolsen 79544 Angle Grinder Instruction Manual

Overview

The 79544 Angle Grinder is a corded 710W tool for controlled grinding, sanding, and wire-brushing tasks. Its compact 100 mm accessory capacity and two-position auxiliary handle make it suitable for workshop maintenance, metal surface preparation, edge cleanup, rust removal, and similar applications where firm two-handed control is required.

This grinder is intended for users who need a mains-powered tool with a high no-load speed. Select an accessory designed for the specific operation, secure the workpiece before starting, and use the wheel guard and auxiliary handle at all times.

Specifications

• Model: 79544
• Rated power: 710W
• Electrical rating: 220–230V AC, 50/60Hz
• No-load speed: 11,000 revolutions per minute
• Maximum accessory diameter: 100 mm
• Maximum accessory thickness: 6 mm
• Spindle thread: M10
• Arbor hole diameter for non-threaded wheels: 16 mm

Detailed Description

The 79544 Angle Grinder uses a high-speed electric motor to rotate an abrasive wheel, sanding accessory, or wire brush around its spindle. The selected accessory performs the work while the operator guides the housing across the material with light, even pressure.

Key external parts include the power switch, air windows, spindle lock, wheel guard, wheel-guard bolt, and auxiliary handle. The spindle lock prevents the spindle from turning while compatible accessories are installed or removed. Never press the spindle lock while the motor is running.

The wheel guard surrounds the exposed portion of the accessory and must be positioned between the rotating wheel and the operator. The auxiliary handle can be fitted on either side of the gear housing, allowing the tool to be configured for left- or right-handed work and different approach angles.

Compatible accessory arrangements include non-threaded grinding wheels mounted with the supplied flange arrangement and threaded M10 accessories such as sanding discs with backing pads, flap discs, wire wheels, and wire cup brushes. Accessories are sold separately unless supplied with the tool package.

Safety

General precautions

• Read all safety instructions before use and retain this guide with the original sales receipt in a dry, safe location.
• Work in a clean, well-lit area away from children, bystanders, flammable liquids, gases, and combustible dust.
• Use a matching electrical outlet. Do not modify the plug or use unsuitable adapters.
• Keep the power cord away from heat, oil, sharp edges, and moving parts. Do not carry, pull, or unplug the tool by its cord.
• Do not use the grinder in rain or wet conditions. If damp conditions cannot be avoided, use a supply protected by a ground-fault circuit interrupter.
• Stay alert. Do not operate the tool when tired or under the influence of alcohol, drugs, or medication.
• Wear approved eye protection. Depending on the job, also use a face shield, hearing protection, suitable gloves, protective footwear, a workshop apron, and a properly selected dust mask or respirator.
• Secure the workpiece with clamps or another practical method. Do not hold the material against your body or rely on one hand to stabilize it.
• Remove adjusting keys and wrenches before switching on the grinder.
• Keep proper footing and balance, and keep loose clothing, jewelry, gloves, and long hair away from rotating parts.
• Disconnect the plug before changing accessories, making adjustments, inspecting the tool, or storing it.
• Do not use the grinder if the switch cannot control it, or if the cord, housing, guard, or another part is damaged.
• Allow qualified repair personnel to service internal electrical components and replace a damaged supply cord.

Accessory and operation hazards

• Use only accessories recommended for the tool and rated for at least the grinder’s maximum speed. For non-threaded grinding wheels, the manual specifies a minimum rating of 10,000 RPM; threaded accessories must be rated for at least 11,000 RPM.
• Keep accessory diameter, thickness, arbor size, and thread type within the specified limits. Incorrectly sized or poorly fitted accessories can vibrate, break, or cause loss of control.
• Inspect every wheel, backing pad, sanding disc, and wire brush before installation. Reject accessories with cracks, chips, tears, excessive wear, loose wires, or other damage.
• After fitting an accessory, stand clear of its rotation plane and run the grinder at no-load speed for one minute. Stop immediately if abnormal vibration, noise, or movement occurs.
• Use the correct guard for the selected wheel and ensure it is firmly secured. Never operate the tool without the wheel guard installed.
• Do not use a grinding wheel for side grinding unless it is specifically designed for that purpose. Do not perform polishing or cut-off operations unless the accessory and tool configuration are expressly intended for them.
• Do not use worn wheels transferred from larger tools. A wheel designed for a larger machine may fail when used at the speed of this grinder.
• Keep the cord clear of the rotating accessory and hold the grinder only by insulated gripping surfaces when hidden wiring or the cord could be contacted.
• Do not set the tool down until the accessory has stopped completely, and do not carry it while the accessory is still rotating.
• Do not use liquid coolants. Water or other liquids near this mains-powered tool can create an electric-shock hazard.
• Wire brushes can eject bristles during normal use. Avoid excessive pressure and wear clothing that protects the skin.
• Wear fire-resistant footwear and suitable protective clothing during grinding. Avoid cuffs, open pockets, or garments that can trap sparks or molten particles.

Setup and Operation

Installing the wheel guard

1. Switch off the tool and unplug it from the electrical outlet.
2. Loosen the wheel-guard bolt.
3. Slide the guard collar over the rim of the gear housing.
4. Rotate the guard so it shields the operator from the exposed side of the accessory and likely spark path.
5. Tighten the wheel-guard bolt securely.
6. Check that the guard cannot move before continuing.

Fitting the auxiliary handle

1. Choose the left or right mounting position on the gear housing.
2. Screw the threaded end of the auxiliary handle into the selected opening.
3. Tighten the handle firmly before operating the grinder.

Do not use the tool with one hand or without the auxiliary handle correctly installed.

Installing a non-threaded grinding wheel

The wheel must be dry, clean, undamaged, no more than 100 mm in diameter, no thicker than 6 mm, and fitted with a 16 mm arbor hole. It must be suitable for surface grinding and rated for at least 10,000 RPM.

1. Unplug the grinder and press and hold the spindle lock.
2. Remove the outer flange while leaving the inner flange in position.
3. Inspect the wheel carefully before mounting.
4. When a wheel is supplied with a gasket, place the gasket side toward the spindle. Center the gasket and ensure the wheel rests flat against the inner flange.
5. Install the outer flange and tighten it with the wrench only enough to hold the wheel securely.
6. Do not overtighten the flange, because excessive pressure can damage the wheel.

Installing a threaded accessory

Threaded accessories must be no larger than 100 mm, use an M10 threaded opening, be undamaged, and have a minimum speed rating of 11,000 RPM. Suitable accessory types include a sanding disc with backing pad, flap disc, wire wheel, or wire cup brush.

1. Unplug the tool and press and hold the spindle lock.
2. Remove the outer and inner flanges and store them safely.
3. Thread the accessory onto the spindle.
4. Use the wrench to tighten the accessory firmly. Wear heavy-duty gloves when handling wire wheels or brushes.

Operating procedure

1. Check that the switch is not locked in the on position, then connect the plug to the outlet.
2. Press down on the switch to release its safety mechanism.
3. Slide the switch toward the wheel to start the motor.
4. Allow the accessory to reach full speed before contacting the workpiece.
5. Hold the grinder firmly with both hands and present the accessory at approximately a 10°–15° angle to the work surface.
6. Use light, controlled pressure. If the motor slows, reduce pressure and let the tool recover.
7. Keep the grinder moving across the surface to produce a more even finish and reduce localized heat.
8. Press down on the rear of the switch and release it to stop the tool.
9. Wait until the accessory has stopped completely before placing the grinder down.
10. Switch off and unplug the tool after use, then clean and store it indoors away from children.

Cleaning and Maintenance

Disconnect the grinder from the electrical supply before inspection, cleaning, maintenance, or accessory changes.

• Inspect the tool before each use for loose hardware, binding or misaligned moving parts, broken or cracked components, damaged wiring, and any other condition that could affect safe operation.
• After use, wipe the external surfaces with a clean cloth.
• Periodically remove dust and grit from the motor air vents with dry compressed air. Wear approved eye protection and suitable breathing protection during this task.
• Stop using the tool if abnormal noise or vibration develops until the cause has been corrected.
• Carbon brushes are inside the motor housing. If motor performance declines or the tool stops, have the brushes checked by a qualified service technician.
• A damaged supply cord must be replaced by a qualified service technician.

Troubleshooting

The tool will not start

• Confirm that the power cord is fully connected.
• Test the outlet and inspect the circuit breaker if the outlet has no power. Make sure the circuit has adequate capacity and is not overloaded.
• If the tool has a thermal reset and it has tripped, switch off the grinder, allow it to cool, and press the reset button.
• If the cord, switch, carbon brushes, or another internal component may be damaged, stop using the grinder and arrange qualified service.

The tool runs slowly

• Reduce pressure on the workpiece and allow the motor to maintain its designed speed.
• A long or undersized extension cord can reduce power. Avoid using one when possible; if necessary, select a cord with the correct conductor size for its length and load.

Performance decreases over time

Worn or damaged carbon brushes may reduce motor performance. Have them inspected and replaced by a qualified technician.

The grinder makes excessive noise or rattles

Internal wear or damage, including possible brush or bearing problems, may be responsible. Disconnect the tool and have it inspected before further use.

The motor overheats

• Reduce feed pressure and allow the tool to work at its own rate.
• Clean blocked motor vents using dry compressed air while wearing suitable eye and breathing protection.
• Avoid long or undersized extension cords that can strain the motor.

The tool does not grind, sand, or brush effectively

• Check that the accessory has the correct arbor or M10 thread and that the flange or arbor nut is tightened correctly.
• Inspect the accessory for wear, damage, or an unsuitable type for the material and operation.
• Replace damaged accessories and use only accessories that meet the grinder’s size and speed requirements.

Pros & Cons

Pros

• 710W motor with an 11,000 RPM no-load speed.
• Compact 100 mm accessory format for controlled surface work.
• M10 spindle supports several threaded sanding and wire-brushing accessories.
• Two-position auxiliary handle supports improved handling and tool control.
• Wheel guard and spindle lock support safer accessory installation and operation.

Cons

• It is a mains-powered tool and requires access to a suitable 220–230V outlet.
• Accessories are not included with the basic tool specification and must meet exact size, thread, arbor, and speed requirements.
• It is not intended for unsupported operations such as liquid-cooled work or applications outside the recommended accessory types.
• Internal carbon-brush service and cord replacement require qualified technical attention.