User manual BOSCH Angle grinder : 47 free PDF user manuals

Q: How to replace the toothed crown of the PWS 720?

The manual for the PWS 720 does not provide specific instructions for replacing an internal toothed crown. Here’s what you can do: If the issue concerns the disc clamping nut If the "toothed crown" refers to the clamping nut (the part that secures the disc): Use the spindle locking button to immobilize Use the supplied wrench to loosen the fixing nut (part 10) Remove the damaged nut Place the new nut and tighten it securely If it is an internal part If the toothed crown is an internal part of the grinder mechanism, it cannot be replaced at home . You must: Contact an authorized Bosch service center Provide the model number PWS 720 and the exact reference of the defective part Important: do not attempt to disassemble the grinder beyond the disc, as this would void the warranty and be dangerous.

Q: Does the BOSCH PWS 20-230 J angle grinder have a soft start?

Yes, the BOSCH PWS 20-230 J is equipped with an electronic current limitation for starting . This function reduces the power during the startup of the device. It allows operation on a 16 A fuse, making it easier to use on standard electrical installations. For your information, the PWS 20-230 model (without the 'J' designation) does not have this current limitation, unlike the PWS 20-230 J version.

Q: How to change the disc on the BOSCH PWS 9-125 CE angle grinder?

Before you begin: Always unplug the grinder from the power supply to avoid any accidental start-up. Wait for the tool holder spindle to come to a complete stop before proceeding. Wear protective gloves, as the discs have sharp edges. Steps to replace the disc: Clean the tool holder spindle 5 and the mounting parts to ensure proper tightening. Press the spindle lock button 4 located on the side of the device to lock the motor shaft. Only press this button when the spindle is completely stopped. While holding the locking nut 10 steady, unscrew it counterclockwise to remove the worn disc. Remove the old disc by sliding it off the spindle. Insert the new disc onto the tool holder spindle 5. Ensure that the disc's bore (central hole) matches the fixing flange 8 (M 14 thread) — do not use adapters or intermediary parts. For diamond cutting discs, check that the arrow indicating the direction of rotation marked on the disc coincides with the direction of rotation of the grinder (indicated by an arrow on the head of the device). Replace the locking nut 10 by screwing it clockwise while keeping the spindle locked. Tighten the nut securely using the spanner provided with the device. Do not use other tools to avoid damaging the nut. After assembly: Check that the disc is securely attached by trying to move it — it should not be removable. Ensure that the protective cover is properly in place for work with grinding or cutting discs. Important warning: Grinding and cutting discs heat up significantly during use — never touch them until they are completely cooled. Due to inertia, the disc continues to spin for a few moments after the device has stopped, even once unplugged.

Q: How to change the disc guard on a BOSCH PWS 750-125 angle grinder?

To change the disc guard on your BOSCH PWS 750-125 angle grinder, you must first ensure that the device is unplugged from the electrical outlet. Depending on your usage, your grinder has two types of interchangeable disc guards: one for sanding and one for cutting. To remove the current disc guard, start by locating the release lever located on the side of the grinder. Hold this lever forward while turning the disc guard. Once the lever is activated, you can turn the disc guard to detach it from the spindle collar. The disc guard unscrews in a few rotations. To install the new disc guard, position it on the spindle collar by aligning the encoding keys of the disc guard with the corresponding slots of the collar. These encoding keys ensure that a compatible disc guard fits perfectly to your model. Keep the release lever pressed during this step and push the disc guard until the shoulder of the disc guard sits firmly against the flange of the grinder. Continue to press the lever and turn the disc guard until you hear a click or a sharp snap indicating that the disc guard is securely locked in place. Then release the lever. Before plugging in the grinder, adjust the position of the disc guard according to your work: press the release lever again and turn the disc guard to the desired position, ensuring to orient the disc guard to avoid sparks towards the operator . Before each use, check that the disc guard is securely attached and does not obstruct the rotation of the disc. The cutting disc guard must always be used when cutting metals, while the sanding disc guard is suitable for grinding and sanding. Only operate the release lever when the grinder is completely stopped to avoid any damage to the device.

Q: How to install the protective guard on the BOSCH GWS 14-125 CIT grinder?

To correctly install the protective guard on your BOSCH GWS 14-125 CIT angle grinder, follow these simple and safe steps: Installation steps for the guard: Unplug the grinder : Ensure that the device is disconnected from any power source to avoid accidental start-up. Prepare the guard : Take the protective guard provided with your grinder. Check that it is in good condition and clean. Position the guard : Align the guard around the grinder's spindle. The guard should cover the wheel while allowing good visibility and easy access for work. Secure the guard : Depending on the model, use the screws or locking system provided to hold the guard in place. Tighten well to prevent any movement during use. Check the fixation : Ensure that the guard is securely attached, with no play or risk of movement. Reconnect the grinder : Once the installation is complete and verified, you can reconnect your device to the power supply. This procedure ensures your safety when using the grinder by protecting against projections and debris.

Q: Where is the brush (escobilla) located on the BOSCH PWS 750-115 angle grinder?

The carbon brush (or escobilla) of the BOSCH PWS 750-115 angle grinder is located inside the motor of the device. It plays an essential role in transferring electrical current to the motor rotor. Location and access to the brush: Always unplug the device before any handling to ensure your safety. Locate the side covers or caps on the body of the grinder, usually found on each side of the motor. These covers are held in place by screws; use a suitable screwdriver to remove them. Once the covers are removed, you will see the carbon brushes inserted into their holders. Maintenance tips: Regularly inspect the condition of the brushes: if they are worn (too short or damaged), it is time to replace them. Only use carbon brushes compatible with the BOSCH PWS 750-115 model. After replacement, securely replace the covers and screw them tightly before turning the device back on. This operation helps maintain the optimal performance of your grinder and prevents damage to the motor.

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