1. Inleiding
Thank you for choosing the WORKPRO 20V Cordless Angle Grinder. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new tool. Please read this manual thoroughly before first use and keep it for future reference.
This powerful and versatile tool is designed for various tasks including grinding, derusting, cutting, and polishing, offering cordless convenience and high performance.
2. Veiligheidsinstructies
Volg altijd de basisveiligheidsmaatregelen bij het gebruik van elektrisch gereedschap om het risico op brand, elektrische schokken en persoonlijk letsel te beperken.
Algemene veiligheidswaarschuwingen voor elektrisch gereedschap:
- Veiligheid werkgebied: Houd de werkplek schoon en goed verlicht. Gebruik geen elektrisch gereedschap in explosieve atmosferen, zoals in de aanwezigheid van ontvlambare vloeistoffen, gassen of stof.
- Elektrische veiligheid: Vermijd lichamelijk contact met geaarde oppervlakken. Stel elektrisch gereedschap niet bloot aan regen of vocht.
- Persoonlijke veiligheid: Stay alert, watch what you are doing and use common sense. Always wear eye protection and hearing protection. Use appropriate personal protective equipment (PPE) such as dust mask, non-skid safety shoes, hard hat, or hearing protection for appropriate conditions.
- Gebruik en onderhoud van elektrisch gereedschap: Forceer het elektrische gereedschap niet. Gebruik het juiste elektrische gereedschap voor uw toepassing. Koppel de accu los van het elektrische gereedschap voordat u aanpassingen uitvoert, accessoires verwisselt of het opbergt.
- Gebruik en onderhoud van batterijgereedschap: Laad de accu alleen op met de door de fabrikant aangegeven lader. Gebruik elektrisch gereedschap alleen met speciaal daarvoor bestemde accu's.
Specific Angle Grinder Safety Warnings:
- Dit elektrische gereedschap is bedoeld om te functioneren als een slijpmachine, schuurmachine, staalborstel of afkortgereedschap. Lees alle veiligheidswaarschuwingen, instructies, illustraties en specificaties die bij dit elektrische gereedschap worden geleverd.
- Gebruik geen accessoires die niet specifiek zijn ontworpen en aanbevolen door de fabrikant van het gereedschap.
- Ensure the accessory is correctly mounted and tightened before use.
- Always use the correct protective guard for the type of work being performed (grinding or cutting).
- Do not operate the tool without the guard properly installed.
- Houd het elektrische gereedschap stevig vast met beide handen.
- Houd uw handen uit de buurt van het draaiende accessoire.
- Wees alert op terugslag, een plotselinge reactie wanneer een draaiend wiel bekneld raakt of vastloopt.
- Do not apply excessive pressure during cutting, as this can activate the protection and stop the machine. If this occurs, turn off the switch and restart immediately.
3. Inhoud van het pakket
Carefully unpack all items and ensure you have received all components listed below. If any items are missing or damaged, please contact WORKPRO customer service.
- 1 x WORKPRO Cordless Angle Grinder
- 1 x 20V 4.0 Ah Lithium-ion Battery
- 1 x snellader
- 5 x Cutting Discs (Ø125mm)
- 2 x Protective Guards (for cutting and grinding)
- 1 x Multi-position Auxiliary Handle
- 1 x sleutel

Image 3.1: The WORKPRO 20V Cordless Angle Grinder along with its complete set of accessories, including the battery, charger, cutting discs, protective guards, auxiliary handle, and wrench.
4. Product voorbijview
Familiarize yourself with the different parts of your WORKPRO Angle Grinder before operation.

Image 4.1: Detailed diagram showing the key components of the angle grinder, including the rubber auxiliary handle, safety lock, spindle lock, metal safety wheel guard for grinding, battery, LED indicator, and the quick-change guard mechanism.
- Rubber Auxiliary Handle: Biedt extra grip en controle.
- Veiligheidsslot: Voorkomt onbedoeld opstarten.
- Asvergrendeling: Wordt gebruikt om de as te vergrendelen voor het eenvoudig wisselen van schijven.
- Metal Safety Wheel Guard (for Grinding): Protects the user during grinding operations.
- Batterij: 20V 4.0Ah Lithium-ion battery for cordless operation.
- LED-indicator: Geeft het batterijlaadniveau weer.
- Change The Guard Without Tool: Quick-release mechanism for changing protective guards.
- Metal Safety Wheel Guard (for Cutting): Protects the user during cutting operations.
- Cut-Off Wheels: Discs for cutting various materials.
- Oplader: Fast charger for the 20V battery.
- Moersleutel: Wrench for securing and removing discs.
5. Instellen
5.1 De batterij opladen
- Insert the 20V 4.0Ah Lithium-ion battery into the fast charger.
- Plug the charger into a standard electrical outlet (Type C - Two round pins, French type).
- The LED indicator on the battery will show the charging status. Ensure the battery is fully charged before first use.
5.2 Het hulphandvat bevestigen
- The auxiliary handle can be attached in multiple positions (left, right, or top) for optimal comfort and control.
- Screw the rubber auxiliary handle firmly into the desired threaded hole on the grinder head.

Image 5.1: Illustration of the 3-position anti-vibration and non-slip rubber handle, demonstrating its adjustability for user comfort and control.
5.3 Installing/Changing Discs and Protective Guards
- Always ensure the battery is removed before changing discs or guards.
- Houd de spindelvergrendelingsknop ingedrukt om te voorkomen dat de spindel draait.
- Use the provided wrench to loosen the flange nut and remove the old disc (if any).
- Plaats de gewenste snij- of slijpschijf op de spindel en zorg ervoor dat deze gecentreerd is.
- Replace the flange nut and tighten it securely with the wrench while holding the spindle lock.
- Select the appropriate protective guard for your task (cutting or grinding). The guards feature a quick-change mechanism.
- Attach the guard by aligning it with the grinder head and snapping it into place. Ensure it is securely fastened and does not tilt.

Image 5.2: The angle grinder shown with the included 5 metal/stainless cut-off wheels and 2 quick-change protective guards, one for cut-off wheels and one for flap discs.
6. Gebruiksaanwijzing
6.1 In-/uitschakelen
- Plaats de opgeladen batterij in de batterijsleuf totdat deze op zijn plaats klikt.
- To start the grinder, locate the switch in the middle-top position. Push the switch to the right, then push it upwards. This two-step operation is a safety feature to prevent accidental startup.
- To turn off the grinder, simply release the switch.

Afbeelding 6.1: Close-up view of the angle grinder's middle switch, highlighting the two-step operation (1. push right, 2. push up) for enhanced safety and the cruise speed function.
6.2 Slijp- en snijtechnieken
- Hold the grinder firmly with both hands, using the auxiliary handle for stability.
- Allow the disc to reach full speed (7500 rpm) before contacting the workpiece.
- For grinding, apply light, even pressure and move the grinder smoothly across the surface.
- For cutting, make shallow passes, gradually increasing the depth. Do not force the tool.
- If the machine stops due to excessive pressure, immediately turn off the switch, remove the pressure, and restart the machine.
- Always direct sparks away from yourself and others, and away from flammable materials.

Image 6.2: A collage demonstrating the angle grinder in action for different applications, including grinding metal, cutting pipes, and surface preparation, with sparks visible during operation.
7. Onderhoud
7.1 Reinigen
- After each use, disconnect the battery and clean the tool with a soft, dry cloth.
- Verwijder stof en ander vuil uit de ventilatieopeningen om oververhitting te voorkomen.
- Gebruik geen water of chemische reinigingsmiddelen.
7.2 Batterijonderhoud
- Bewaar de batterij op een koele, droge plaats, uit de buurt van direct zonlicht en extreme temperaturen.
- Do not store the battery in a discharged state for extended periods. Recharge it periodically if not in use.
- Stel de batterij niet bloot aan water of vuur.
7.3 Schijf vervangen
- Replace discs when they become worn, damaged, or lose their effectiveness.
- Always use discs with the correct diameter (Ø125mm) and bore size for this grinder.
- Follow the instructions in Section 5.3 for safe disc replacement.
8. Probleemoplossing
This section addresses common issues you might encounter with your WORKPRO Angle Grinder.
| Probleem | Mogelijke oorzaak | Oplossing |
|---|---|---|
| De molen start niet. | Batterij niet opgeladen of niet goed geplaatst. Safety switch not engaged properly. | Zorg ervoor dat de batterij volledig is opgeladen en goed vastzit. Follow the two-step switch operation (push right, then push up). |
| De slijpmachine stopt tijdens het gebruik. | Excessive pressure applied, activating overload protection. Batterij is bijna leeg. | Reduce pressure on the workpiece. Turn off the switch, then restart. Laad de batterij op. |
| Overmatige trillingen of lawaai. | Disc is worn, damaged, or improperly installed. Guard is loose or tilted. | Inspect and replace the disc if necessary. Ensure the disc is correctly mounted and tightened. Re-secure the protective guard, ensuring it is not tilted. |
| Poor cutting/grinding performance. | Versleten of verkeerde schijf. Insufficient speed due to low battery. | Replace with a new, appropriate disc. Laad de batterij op. |
9. Specificaties
Detailed technical specifications for the WORKPRO 20V Cordless Angle Grinder.
| Functie | Specificatie |
|---|---|
| Merk | WERKPRO |
| Modelnummer | W125049AU |
| Energiebron | Op batterijen |
| Batterijtype | 20 V 4.0 Ah lithium-ion |
| Snelheid zonder belasting | 7500 tpm |
| Schijfdiameter | Ø125mm |
| Gewicht (zonder batterij) | 1.75 kg |
| Total Weight (with battery) | 3.58 kg (Verpakkingsgewicht) |
| Materiaal | Gelegeerd staal |
| Kleur | Grey, Black, Green |
| Fabrikant | Hang Zhou Great Star Industrial Co.,LTD |
| UPC | 820909764137 |

Image 9.1: The angle grinder placed on a scale, illustrating its lightweight design at only 1.75 kg without the battery, which helps reduce user fatigue during prolonged work.
10. Garantie en ondersteuning
The WORKPRO 20V Cordless Angle Grinder comes with a 1 jaar fabrieksgarantie vanaf de aankoopdatum.
This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, abuse, neglect, unauthorized repairs, or normal wear and tear.
For warranty claims, technical support, or inquiries about spare parts, please contact WORKPRO customer service through your original point of purchase or visit the official WORKPRO webplaats.
Bewaar uw aankoopbewijs om de garantie te valideren.