DEWALT D25891K SDS Max Demolition Hammer, 15 Amp with SHOCKS Active Vibration Control

The DEWALT D25891K SDS Max Demolition Hammer is built for contractors and serious DIYers who need reliable breaking and chipping power. With a 15 Amp motor and 15 ft-lbs of impact energy, this SDS Max hammer can handle concrete slabs, brick, tile, and masonry. Its SHOCKS Active Vibration Control reduces vibration up to 50%, so you can stay productive longer with less fatigue. Best of all, the D25891K features electronic variable speed, letting you match pace and impact to the material for cleaner, more controlled demolition work.

DEWALT D25891K SDS Max Demolition Hammer Power Features

The D25891K's 15 Amp motor supplies consistent power with overload protection for demanding jobs. The lock-on slide switch keeps the hammer running without constant trigger pressure, ideal for extended chipping sessions. Its modular design makes service easier: access the switch, motor, cordset, brushes, and gear case without unnecessary disassembly.

Impact Energy and Variable Speed

At 15 ft-lbs, this hammer crushes through tough material quickly. The electronic variable speed dial lets you reduce impact frequency when you need precision, such as scoring concrete before a full breakaway. This versatility makes it a good fit for both heavy demolition and lighter chipping tasks.

Common D25891K Performance Issues and Checks

If your D25891K seems weak or not hitting hard, run through these quick checks:

• Make sure the SDS Max bit is fully seated in the chuck and locked.
• Confirm the variable speed dial is not set too low.
• Check the power cord and outlet for voltage drops.
• Inspect carbon brushes for wear; worn brushes reduce motor performance.
• Try a different SDS Max chisel to rule out a dull accessory.

If the hammer still lacks impact, contact a qualified service center to check the hammering mechanism and grease levels.

Choose the Right Accessories for Your D25891K

This SDS Max hammer accepts standard SDS Max chisels, points, and bushing tools. Using sharp, correctly sized accessories reduces stress on the motor and improves breaking efficiency.