1. Instruccions de seguretat importants
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury when operating power tools. Read all instructions before operating this tool.
- Seguretat de l'àrea de treball: Mantingueu la zona de treball neta i ben il·luminada. Les zones desordenades o fosques conviden als accidents. No feu servir eines elèctriques en atmosferes explosives, com ara en presència de líquids, gasos o pols inflamables.
- Seguretat elèctrica: Els endolls de les eines elèctriques han de coincidir amb la presa de corrent. No modifiqueu mai l'endoll de cap manera. Eviteu el contacte corporal amb superfícies connectades a terra o amb connexió a terra, com ara canonades, radiadors, fogons i neveres.
- Seguretat personal: Porteu sempre protecció ocular. Feu servir protecció auditiva quan treballeu durant períodes prolongats. Porteu una màscara antipols si les operacions generen pols. Vestiu-vos correctament; eviteu roba ampla o joies.
- Ús i cura de l'eina: No forceu l'eina elèctrica. Feu servir l'eina elèctrica adequada per a la vostra aplicació. Desconnecteu l'endoll de la font d'alimentació abans de fer qualsevol ajust, canviar accessoris o guardar eines elèctriques.
- Seguretat específica del molinet: Ensure the wheel is correctly mounted and tightened before use. Always use the guard. Do not use damaged or incorrect accessories.
2. Producte acabatview
The Makita M9512B is a compact and powerful 4-inch angle grinder designed for various grinding, cutting, and sanding applications. It features a robust motor and durable construction for professional and DIY use.

Figure 1: Makita M9512B 4-inch Angle Grinder. This image shows the overall design of the angle grinder, including the main body, grinding wheel, and side handle attachment point.
Components clau:
- Bloqueig de l'eix: For easy wheel changes.
- Mànec lateral: Provides additional control and comfort.
- Wheel Guard: Protects against sparks and debris.
- Interruptor d'encesa/apagada: For tool activation.
- Mola: The abrasive disc used for material removal.
3. Configuració
Before using the angle grinder, ensure it is properly assembled and all safety components are in place.
3.1 Attaching the Wheel Guard
The wheel guard must always be used. Loosen the screw on the guard, position it to cover the wheel as much as possible, and tighten the screw securely. Ensure the guard is positioned to deflect sparks away from you.
3.2 Installing the Side Handle
Screw the side handle firmly into one of the threaded holes on the gear housing. Choose the position that offers the best control and comfort for your application.
3.3 Mounting the Grinding Wheel
- Desendolleu l'eina de la font d'alimentació.
- Premeu el botó de bloqueig del fus per evitar que el fus giri.
- Col·loqueu la brida interior al cargol.
- Place the desired grinding wheel onto the inner flange, ensuring it sits flush.
- Screw the lock nut onto the spindle and tighten it firmly using the provided wrench.
- Allibereu el bloqueig del cargol.
Precaució: Always use wheels with the correct diameter and bore size for this tool. Never use a damaged or cracked wheel.
4. Instruccions de funcionament
Follow these guidelines for safe and effective operation of your Makita M9512B angle grinder.
4.1 Inici i aturada
- Començar: Plug the tool into a suitable power outlet. Push the slide switch forward to the "I" (ON) position.
- Parar: Push the slide switch backward to the "O" (OFF) position.
4.2 Tècniques de mòlta
- Agafeu l'eina fermament amb les dues mans.
- Position the wheel at an angle of approximately 15-30 degrees to the workpiece surface.
- Apply light pressure and move the grinder smoothly across the surface. Avoid excessive pressure, which can reduce efficiency and damage the wheel or motor.
- Deixeu que l'eina arribi a la màxima velocitat abans de tocar la peça.
- For cutting operations, ensure the workpiece is securely clamped. Make shallow passes rather than attempting to cut through thick material in one go.
Avís: Never use the side of a cutting wheel for grinding. This can cause the wheel to shatter.
5. Manteniment
Regular maintenance ensures optimal performance and extends the life of your angle grinder. Always unplug the tool before performing any maintenance.
5.1 Neteja
Periodically clean the ventilation openings on the tool to prevent dust buildup, which can lead to overheating. Use a soft brush or compressed air. Do not use water or chemical cleaners.
5.2 Inspecció i substitució de les escombretes de carbó
The motor uses carbon brushes, which are consumable parts. Inspect them regularly. When they wear down to the limit mark, replace both brushes simultaneously. Refer to a qualified service center for brush replacement if you are unsure.
5.3 Inspecció del cable d'alimentació
Regularly inspect the power cord for damage. If the cord is damaged, have it replaced by a Makita authorized service center to avoid electrical hazards.
6. Solució De Problemes
Aquesta secció tracta problemes comuns que podeu trobar amb la vostra esmoladora angular.
| Problema | Causa possible | Solució |
|---|---|---|
| L'eina no s'inicia | No power supply; Damaged power cord; Worn carbon brushes; Faulty switch | Check power outlet and cord. Replace cord if damaged. Inspect/replace carbon brushes. Contact service center for switch repair. |
| Vibració excessiva | Improperly mounted wheel; Damaged or unbalanced wheel; Loose components | Ensure wheel is correctly mounted and tightened. Replace damaged wheel. Check for loose screws. |
| Sobreescalfament | Blocked ventilation openings; Excessive load; Worn carbon brushes | Clean ventilation openings. Reduce pressure during operation. Inspect/replace carbon brushes. |
| Rendiment reduït | Worn carbon brushes; Dull grinding wheel | Inspect/replace carbon brushes. Replace grinding wheel. |
Si el problema persisteix després d'intentar aquestes solucions, poseu-vos en contacte amb un centre de servei autoritzat de Makita.
7. Especificacions
Technical details for the Makita M9512B angle grinder.
| Característica | Detall |
|---|---|
| Número de model | M9512B |
| Font d'alimentació | Elèctric amb cable |
| Wattage | 720 watts |
| Velocitat de rotació màxima | 11000 RPM |
| Dimensions del producte (L x A x A) | 32L x 14W x 13H centímetres |
| Pes de l'article | 1.5 kg (1500 grams) |
| Color | Turquesa |
| Components inclosos | M9512B (main unit) |
8. Garantia i Suport
Makita power tools are manufactured to high standards and undergo rigorous quality control. This product is covered by Makita's standard warranty against defects in materials and workmanship.
For warranty claims, technical support, or service, please contact your local authorized Makita service center or the retailer from whom the product was purchased. Ensure you have your proof of purchase and the product's model number (M9512B) available.
You can find contact information for Makita service centers on the official Makita weblloc: www.makita.in