1. Introducció
The Skil 5402 Circular Saw, with 1400 Watts of power, is engineered for efficient cutting of wood and its derivatives. This manual provides essential information for the safe and effective use, setup, and maintenance of your tool. Please read it thoroughly before operation.

Figure 1: Skil 5402 Circular Saw, main view.
2. Informació de seguretat
Prioritzeu sempre la seguretat quan feu servir eines elèctriques. Si no seguiu les instruccions de seguretat, podeu patir lesions greus.
Pautes generals de seguretat:
- Utilitzeu l'equip de protecció individual (EPI) adequat, incloent-hi ulleres de seguretat, protecció auditiva i guants.
- Assegureu-vos que la vostra zona de treball estigui neta, ben il·luminada i lliure d'obstacles.
- Mantingueu els nens i els espectadors allunyats mentre feu servir l'eina.
- No feu servir eines elèctriques en atmosferes explosives, com ara en presència de líquids, gasos o pols inflamables.
- Always unplug the saw before making any adjustments, changing accessories, or storing the tool.
- The Skil 5402 features an anti-involuntary activation switch to prevent accidental starting. Always engage this safety feature when not actively cutting.
- Ensure the retractable blade guard functions correctly and is not obstructed.
3. Components inclosos
Your Skil 5402 Circular Saw package includes the following items:
- 1 Skil 5402 Circular Saw
- 1 manual d'instruccions
- 1 Premium 24-tooth Blade
- 1 Clau Allen
- 1 Parallel Guide

Figure 2: Skil 5402 Circular Saw with its standard accessories.
4. Configuració
Proper setup ensures safe and accurate operation.
4.1. Instal·lació de la fulla
- Assegureu-vos que la serra estigui desendollada de la font d'alimentació.
- Press and hold the spindle lock button to prevent the shaft from rotating.
- Use the provided Allen key to loosen the blade retaining screw.
- Carefully remove the outer flange and old blade (if applicable).
- Place the new 24-tooth premium blade onto the spindle, ensuring the teeth are oriented correctly for cutting (usually indicated by an arrow on the blade matching the saw's rotation direction).
- Replace the outer flange and tighten the blade retaining screw firmly with the Allen key while holding the spindle lock button.

Figura 3: lateral view of the circular saw, highlighting the blade area for installation.
4.2. Ajust de profunditat
The cutting depth can be adjusted up to 65mm. For optimal safety and cut quality, set the blade depth so that only one or two teeth extend below the workpiece.
- Afluixeu la palanca d'ajust de profunditat.
- Pugeu o baixeu la base de la serra per aconseguir la profunditat de tall desitjada.
- Estrenyeu bé la palanca d'ajust de profunditat.
4.3. Ajust d'angle
The saw allows for bevel cuts up to 45°.
- Afloixeu el botó d'ajust del bisell.
- Tilt the saw base to the desired angle (up to 45°).
- Premeu fermament el botó d'ajust del bisell.
5. Instruccions de funcionament
Follow these steps for safe and effective operation of your circular saw.
5.1. Starting the Saw
- Assegureu-vos que la peça de treball estigui ben ferma clamped.
- Hold the saw firmly with both hands, utilizing the robust auxiliary handle for stability.
- Press the anti-involuntary activation switch, then squeeze the trigger to start the saw.
- Deixeu que la fulla arribi a tota velocitat abans de començar el tall.
5.2. Fer un tall
- Gently guide the saw into the workpiece, maintaining a steady, consistent feed rate. Do not force the saw.
- The efficient dust ejection system will direct sawdust away from the user.
- Use the parallel guide for straight and accurate cuts.
- Un cop finalitzat el tall, deixeu anar el gallet i deixeu que la fulla s'aturi completament abans d'aixecar la serra de la peça de treball.

Figure 4: Proper technique for operating the circular saw.

Figura 5: Detallada view of the blade during a cut.
5.3. Video Demonstration: Smooth Cutting Techniques
Video 1: This video demonstrates techniques for achieving smooth cuts and avoiding wood jamming, which can be helpful for optimizing your circular saw's performance.
6. Manteniment
Regular maintenance ensures the longevity and optimal performance of your Skil 5402 Circular Saw.
6.1. Neteja
- After each use, unplug the saw and clean off sawdust and debris from the tool, especially around the blade guard and motor vents.
- Use a soft brush or compressed air for cleaning. Do not use solvents or abrasive cleaners.

Figure 6: The saw's efficient dust ejection system helps keep the work area clean.
6.2. Substitució de les escombretes de carbó
The carbon brushes are easily accessible for simple and quick replacement when worn. Refer to the detailed instructions in the full manual for the specific procedure.
6.3. Cura de la fulla
- Regularly inspect the blade for sharpness and damage. A dull or damaged blade can cause kickback and poor cut quality.
- Replace worn blades promptly with appropriate replacements, such as the included 24-tooth premium blade.
7. Solució De Problemes
Aquesta secció tracta els problemes habituals que podeu trobar amb la vostra serra circular.
| Problema | Causa possible | Solució |
|---|---|---|
| La serra no arrenca | No power supply; Anti-involuntary activation switch not engaged; Worn carbon brushes | Check power connection; Ensure safety switch is pressed before trigger; Replace carbon brushes. |
| Poor cut quality / Saw binding | Dull or incorrect blade; Incorrect cutting depth; Workpiece not secured; Forcing the saw | Replace blade; Adjust cutting depth; Secure workpiece; Reduce feed rate. |
| Vibració excessiva | Fulla solta; Fulla danyada; Problema amb el motor | Tighten blade screw; Replace blade; Contact service center if motor issue suspected. |
8. Especificacions
| Característica | Detall |
|---|---|
| Marca | Bosch (Skil) |
| Número de model | F0125402JA |
| Poder | 1400 watts |
| Voltage | 220 Volts |
| Material de la fulla | Acer d'alta velocitat |
| Nombre de dents | 24 |
| Profunditat de tall màxima | 65 mm |
| Angle de bisell màxim | 45 graus |
| Superfície recomanada | Fusta |
| Dimensions de l'article (L x A x A) | 35.5 x 24.5 x 22.5 cm |
| Pes de l'article | 4.83 quilos |
9. Garantia i Suport
The Skil 5402 Circular Saw comes with a comprehensive warranty to ensure your peace of mind.
9.1. Informació de la garantia
Aquest producte inclou un 2 any de garantia against manufacturing defects and failures. Please retain your proof of purchase for warranty claims.
9.2. Atenció al client
For technical assistance, spare parts, or warranty service, please contact your local authorized Skil or Bosch service center. Refer to the contact information provided in the packaging or on the official Bosch weblloc.