that signals when the carbon brushes are worn and need replacement to prevent motor damage. Best Operating Practices Bit Lubrication : Before inserting an SDS-max bit, apply a small amount of recommended grease to the connection end. Drilling Pressure : Apply roughly 10–15 kg of pressure

To optimize the performance of your Hilti TE 55, here are some additional tips to keep in mind:

Why it matters: The TE 55 has enough torque to break your wrist if the bit jams.