Bosch Combi Drill IssuesUpdated 4 hours ago

Chuck Slipping

If the drill bit slips during use, the chuck may no longer be gripping properly.

Possible Causes

• Worn chuck jaws
• Dirt or debris inside the chuck
• Incorrect drill bit installation
• General wear through extended use

Resolution

• Remove the drill bit and clean inside the chuck.
• Reinsert the accessory and tighten securely.
• Inspect the chuck jaws for signs of wear.

Replace the chuck if it no longer grips bits effectively.

Hammer Function Not Working

The drill rotates normally but produces little or no hammer action.

Possible Causes

• Hammer mode not fully engaged
• Worn hammer mechanism
• Faulty mode selector
• Internal dust contamination

Resolution

• Ensure the selector is fully engaged in hammer mode.
• Rotate through all operating modes several times.
• Clean around the selector switch.
• Have the hammer mechanism inspected if the fault persists.

Loss of Drilling Performance

The drill struggles to make progress through materials it would normally handle with ease.

Possible Causes

• Motor wear
• Gearbox wear
• Excessive load on the tool
• Incorrect drill bit

Resolution

• Check the drill bit is suitable and sharp.
• Avoid excessive pressure during drilling.
• Listen for unusual noises from the gearbox.
• Arrange servicing if performance continues to deteriorate.