Description
Yato cordless angle grinder 3 speeds 2×4 Ah is an 18 V brushless angle grinder for 125 mm discs with three-stage electronic speed control 5000 / 7000 / 9000 min⁻¹. The set includes two 4.0 Ah Li-Ion batteries, a fast charger and a carrying bag, so one battery can charge while the other is in use.
The grinder is designed for grinding and cutting metal and mineral building materials, such as brick, natural and artificial stone, concrete and tiles, with discs suited to the material. The spindle thread is M14 and the disc bore 22.2 mm, so the grinder takes standard 125 mm cutting, grinding and flap discs, diamond discs and M14-threaded wire brushes.
The brushless motor works without wearing carbon brushes, which reduces the number of wearing parts and motor heating. Soft start accelerates the disc evenly and reduces the start-up jolt and the strain on the gearbox. The speed stage is selected with the grinder’s speed selector: the lower speeds suit wire brushes and sanding discs, the highest speed grinding and cutting discs.
The device weighs 1.5 kg. The switch is a paddle switch under the handle that can be locked on for extended work. The auxiliary handle can be fitted on either side of the grinder, and the disc guard is adjusted to suit the work. The grinder has insulation class III and IP rating IPX0, so it must not be used in rain or wet conditions.
Uses and suitability:
The angle grinder is suitable for cutting and grinding metal and working stone materials on battery power without mains electricity. Suitable discs and accessories, such as the Yato cutting disc for metal and Yato flap disc 125 mm, are chosen according to the material being worked.
- Cutting steel and metal parts: Cutting profiles, pipes, threaded rods and sheets with a cutting disc at the highest speed stage of 9000 min⁻¹; cut in a straight line with the disc perpendicular to the surface.
- Grinding metal surfaces: Grinding welds, edges and burrs with a grinding disc or flap disc; when grinding with the side, hold the grinder at an angle of no more than 30° to the surface.
- Removing rust and paint: Wire brushes and sanding discs at the lower speed stages of 5000 or 7000 min⁻¹, which puts less strain on the brush wires and sandpaper.
- Renovation, installation and construction work: Cutting and grinding brick, stone, concrete and tiles with discs for stone or diamond discs for dry use.
- Working without mains power: With two 4.0 Ah batteries, work can continue by swapping the battery while the other charges in about 2 hours. The same batteries can be used in other tools in the Yato 18V system; a suitable extra charger is, for example, the Yato battery charger 18V 2.2A.
Package contents:
- Cordless angle grinder
- 2 pcs Li-Ion battery 18 V 4.0 Ah
- Charger (charging station)
- Auxiliary handle
- Disc guard
- Disc wrench
- Carry case
Grinding discs are not included.
Features:
- Three-stage speed control: Electronic speed selector, stages 5000, 7000 and 9000 min⁻¹; the speed is chosen according to the disc and the work.
- Brushless motor: No replaceable carbon brushes, fewer wearing parts and less motor heating.
- Soft start: Limits the starting current and accelerates the disc evenly, which improves control and eases the load on the gearbox.
- Paddle switch with lock: Switch under the handle; start by pressing the rear of the switch and pushing it forward, lock for extended work. After a power interruption, the grinder does not start until the switch is released and switched on again.
- Standard mounting: 125 mm discs, 22.2 mm bore, M14 spindle thread, disc thickness up to 6 mm; flange position for thin (≤3.2 mm) and thick (>3.2 mm) discs.
- Spindle lock: Disc change with the wrench without a separate tool to hold the spindle.
- Auxiliary handle on either side: Mounting holes on both sides of the grinder for a right- or left-handed grip.
- Batteries and fast charging: Two 4.0 Ah Li-Ion batteries with charge level indicator; charging time about 2 h, no memory effect in Li-ion batteries.
- Yato 18V battery system: Other compatible batteries YT-828461 (2 Ah), YT-828462 (3 Ah), YT-828463 (4 Ah), YT-828464 (6 Ah) and YT-828465 (9 Ah); chargers YT-828498–YT-828502.
Technical specifications:
- Voltage: 18 V DC
- Battery type: Li-Ion (Yato 18V)
- Battery capacity: 4000 mAh (4.0 Ah)
- Batteries included: 2
- Charger included: yes
- Charging time: 2 h
- Fast charging: yes
- Charge level indicator: yes
- Charger input voltage: 200–240 V~, 50/60 Hz
- Charger rated current: 2 A
- Charger output voltage and current: 21.5 V DC / 2.2 A
- Charger insulation class: II
- Battery service life: about 500 charge-discharge cycles
- Motor: brushless
- Speed: 5000 / 7000 / 9000 min⁻¹
- Speed control: yes, electronic, 3-stage
- Soft start: yes
- Disc diameter: 125 mm
- Disc bore diameter: 22.2 mm
- Spindle thread: M14
- Maximum disc thickness: 6 mm
- Minimum disc peripheral speed: 80 m/s
- Insulation class: III
- IP rating: IPX0
- Sound pressure level LpA: 82.7 ± 3.0 dB(A)
- Sound power level LwA: 90.7 ± 3.0 dB(A)
- Vibration ah,AG (main handle / auxiliary handle): 7.174 ± 1.5 / 10.001 ± 1.5 m/s²
- Device weight: 1.5 kg
- Maximum permitted surface temperature: 60 °C
Yato cordless angle grinder 3 speeds 2×4 Ah user manual:
Carry out all assembly and adjustment with the battery removed. Read the entire user manual before first use.
- Charging the batteries: The batteries are supplied uncharged. Place the battery in the charger and plug the charger into a socket; the indicator light shows the charging status. Charge only in an enclosed, dry space under supervision and unplug the charger when charging is complete.
- Guard and auxiliary handle: Place the disc guard around the spindle and tighten it so that the unprotected part of the disc faces away from your hands. Screw the auxiliary handle firmly into the left or right side of the grinder.
- Fitting the disc: Place the upper flange on the spindle, the disc on the flange and screw the lower flange onto the spindle. Press the spindle lock and tighten the lower flange with the wrench. An M14-threaded disc or brush is screwed directly onto the spindle without flanges.
- Test run: Insert the battery, start the grinder and let it run without load for about 1 minute. Remove the battery and check the disc mounting.
- Selecting the speed: Select the speed stage with the speed selector with the battery in place: 5000 or 7000 min⁻¹ for brushes and sandpaper, 9000 min⁻¹ for grinding and cutting discs.
- Working: Secure the workpiece in a vice or clamp. Hold the grinder with both hands. Grind with the side of the disc at an angle of no more than 30° with even back-and-forth movements; cut in a straight line with the disc perpendicular to the surface and guide the grinder in the direction of disc rotation.
- Finishing work: Release the switch and let the disc stop completely before putting the grinder down. Remove the battery and let the disc cool before inspecting it.
- Maintenance: Clean the body, ventilation openings, switches, auxiliary handle and guard with compressed air (max. 0.3 MPa), a brush or a dry cloth without chemicals. Do not dismantle the grinder during the warranty period; faults are repaired by an authorised service centre.
- Battery storage: Store the batteries at 0–30 °C charged to about 70%, and charge them about once a year during long-term storage.
Warnings:
- Protective equipment: Always wear safety glasses, hearing protection and protective gloves; a respirator and face shield if necessary.
- Guard always in place: Never use the grinder without the disc guard fitted.
- Disc speed rating: Use only discs with a permitted peripheral speed of at least 80 m/s and a permitted rotational speed of at least 9000 min⁻¹.
- Kickback: A jamming disc can throw the grinder towards the user. Do not cut along a curved line, do not tilt the disc in the cut and do not restart a cut inside the material.
- Prohibited blades: Do not use chainsaw chain blades, circular saw blades or segmented diamond discs with a segment gap of more than 10 mm.
- No liquid cooling: Do not use accessories that require water or coolant, and do not polish with the grinder.
- Sparks: Do not work near flammable materials or in potentially explosive atmospheres.
- Hidden wiring: When plunge cutting into walls, the disc may hit electrical wiring or gas pipes; hold the grinder by its insulated gripping surfaces.
- Run-on and heat: The disc keeps rotating after switching off, and the disc and the workpiece may be hot.
- Batteries and charger: Use only Yato 18V batteries and the charger in the set. Do not use a damaged charger or battery, do not short-circuit the battery terminals and do not leave charging unattended. If the charger gives off smoke or a smell, unplug it immediately.
Frequently asked questions (FAQ):
What does the Yato cordless angle grinder 3 speeds 2×4 Ah set include?
The grinder, two 18 V 4.0 Ah Li-Ion batteries, a charger, an auxiliary handle, a disc guard, a disc wrench and a carrying bag. The same grinder with one battery is YT-828254, and without battery and charger YT-828256.
How long does it take to charge the battery?
With the charger in the set, the 4.0 Ah battery takes about 2 hours to charge.
What are the three speed stages used for?
The lower speeds of 5000 and 7000 min⁻¹ suit wire brushes and sanding discs, the highest speed of 9000 min⁻¹ grinding and cutting discs.
What kind of discs can be fitted?
125 mm discs with a 22.2 mm bore, a thickness of up to 6 mm and a permitted peripheral speed of at least 80 m/s, as well as M14-threaded discs and brushes.
Can the grinder cut wood or polish?
No. The grinder is designed for grinding and cutting metal and stone materials; working wood and polishing are prohibited.
How much does the grinder weigh?
The declared weight of the device is 1.5 kg; the net weight of the whole set is 4.78 kg.
Recycling instructions:
The Yato cordless angle grinder 3 speeds 2×4 Ah is electrical and electronic equipment (EEE) that must not be disposed of with mixed waste. At the end of its life, take the grinder to a WEEE collection point. The grinder and charger belong in WEEE collection; return Li-ion batteries separately to a battery collection point, and protect the battery terminals with tape before returning them. Recycle the cardboard packaging as cardboard and plastic parts as plastic.
