Cordless Power Tools & Brushless Motor Mastery

Why is grease applied to the shank of SDS masonry drill bits before inserting them into a rotary hammer?

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 Correct IncorrectSDS bits slide axially thousands of times per minute against the internal striker pin. Shank grease prevents extreme metal-on-metal friction galling and extends chuck life.

Why is grease applied to the shank of SDS masonry drill bits before inserting them into a rotary hammer?

• To make the tool smell pleasant on job sites
• To glue the bit permanently into the sleeve
• To lubricate the axial sliding movement and prevent steel-on-steel friction galling
• To keep masonry dust from entering the wall hole