Introduction

The FLEX FX1551A-Z 1" SDS Plus Rotary Hammer (Tool Only) is built for serious pros who demand power, speed, and reliability on tough jobs. This 24V brushless workhorse pairs FLEX durability with flexible chuck options, so you’re always ready to adapt—without dragging around unnecessary batteries and chargers (sold separately).

Key Features & Design

• The FLEX ADVANTAGE 20% more power with 24V lithium, 25% longer runtime with THERMA-TECH™ heat management, up to 50% faster charging with high-power, dual fan chargers (batteries and chargers sold separately).
• SENSOR-FREE™ BRUSHLESS MOTOR Every FLEX 24V tool uses an intelligent Sensor-Free™ brushless motor for efficient, durable performance—minus the sensor drama.
• CONSTANT SPEED CONTROL Delivers maximum power and efficiency, even under load—no sudden sputters, just steady progress.
• VIBRATION SUPPRESSION Isolates tool and user from vibration for improved comfort and control during long tasks.
• FUNCTION SWITCH WITH FOUR MODES Seamlessly switch between drilling, hammer drilling, chiseling, and chisel adjustment for maximum productivity.
• INTERCHANGEABLE CHUCK Quickly switch from SDS to a ½" full metal chuck (½" keyless chuck included) for optimal efficiency.
• FLEX 24V CROSS COMPATIBILITY Compatible with all FLEX 24V batteries, chargers, and tools (battery and charger sold separately).
• END-TO-END 5 YEAR WARRANTY Register your new FLEX 24V tools, batteries, and chargers for a full 5-year warranty.
• Integrated LED Light Built-in illumination helps you nail precision in low-light conditions.

Specifications

• No-Load Speed: 0-980 RPM
• Blows/Min: 0-4,350 BPM
• Max. Drilling Diameter: 1 in, 26 mm (Concrete); 1/2 in, 13 mm (Steel); 1-3/16 in, 30 mm (Wood)
• Max. Impact Energy: 1.9 ft-lbs, 2.6 joules
• Tool Weight (without battery): 7 lbs, 3.2 kg

Ready to upgrade your toolkit? The FLEX FX1551A-Z (Tool Only) delivers serious performance for concrete, steel, and wood, with intelligent motor design, versatile chuck options, and a warranty that has you covered from start to finish. Battery and charger sold separately.