Makita 40V Max XGT Brushless Lithium-Ion 1-3/16 in. Cordless AVT AWS Rotary Hammer Kit (4 Ah) - GRH08M1

Features

• PERFORMANCE : Makita brushless motor and 40V max XGT battery deliver the power needed for heavy applications
• CONTROL : AFT electronically turns off the motor if rotation of bit is suddenly forced to stop
• COMFORT : AVT is a counterbalance system along with vibration-absorbing handles that work to reduce vibration
• DUST MANAGEMENT : Dust extraction capability with OSHA Table 1 compliant HEPA Dust Extractor (sold separately)
• INCLUDES : (1) 40V max XGT Lithium-Ion 4.0Ah battery, charger, side handle, grease, towel, tool bag
• OUTPOWER: Makita-built brushless motor along with 40V max XGT battery combine to deliver the power and performance required for heavy-load applications
• OUTSMART: Constant speed control automatically applies additional power under load for optimum performance
• OUTLAST: Overload protection is designed to protect the motor from burnout in abnormally high torque situations
• XGT technology delivers up to 135 of 3/8" holes using a fully charged 40V XGT 4.0Ah battery*
• Active Feedback-Sensing Technology (AFT) electronically turns off the motor if rotation of bit is suddenly forced to stop
• Anti-Vibration Technology (AVT) is an internal counterbalance system along with vibration-absorbing handles that work together to reduce vibration
• Dust extraction capability with OSHA Table 1 compliant on-board HEPA Dust Extractor or stand-alone AWS Extractor options
• Auto-Start Wireless System (AWS) which utilizes Bluetooth technology for wireless power-on/off communication between tool and dust extractor (AWS Transmitter sold separately)
• Electric brake allows the tool to be repositioned faster for maximum productivity
• Torque limiting clutch engineered to prevent gear damage by automatically disengaging gears during a bind-up situation
• Variable speed dial and trigger enables user to match the speed to the application
• Built-in L.E.D. light with an independent on/off illuminates the work area
• Ergonomic soft-grip handle and large 2-finger trigger provide increased comfort on the job
• 3-mode operation for "Rotation Only", "Hammering with Rotation" or "Hammering Only" for multiple applications
• Retractable tool hook secures the tool when not in use
• Extreme Protection Technology (XPT) is engineered for improved dust and water resistance for operation in harsh conditions
• The digital communication within XGT optimizes performance to provide up to 2X longer sustained power under heavy-load applications
• The digital communication within XGT actively monitors and protects against overload, over-discharge and overheating
• XGT Tools and Batteries are designed with a multi-layer contact interface for more constant power delivery to take on high-current demands
• XGT Batteries feature rigid rails with impact-resistant construction to secure the battery to the tool during high-demand applications
• The XGT Rapid Charger with dual-fan design circulates air through the battery to cool the battery and circuit board quickly for faster charging
• The XGT Rapid Charger’s digital display indicates battery charge level (-80%, +80%, 100%)
• The XGT Rapid Charger’s built-in chip thoroughly communicates during the charging process to control current, voltage, and temperature for more efficient charging
• Compatible with Makita 40V max XGT Lithium-Ion Batteries
• Only use genuine Makita batteries and chargers
• 3-year limited warranty on tool, battery and charger
• *Tested 2-3/8" deep holes in 5,000 PSI concrete
• Max. Capacity (concrete drilling) : 1-3/16"
• Optimum Range (concrete drilling) : 3/16" - 3/4"
• Impact Energy (ft.lbs.) : 2.9
• Impact Energy (Joules) : 3.9 J
• Blows Per Minute (variable speed) : 0 - 4,500 BPM
• No Load Speed (variable speed) : 0 - 840 RPM
• Bind-Up Control : Yes
• Max. Capacity (concrete drilling w/ core bit) : 3-1/8"
• Vibration Control : Yes
• System : 40V max XGT
• Vibration (m/s²) : 9.1
• Automatic-start Wireless System (AWS) : Capable (transmitter sold separately)
• Bit Type : Accepts SDS-PLUS
• Overall Length : 15-5/8"
• Net Weight (with battery) : 10.1 lbs.
• Power Type : Cordless
• Shipping Weight : 21.3 lbs.
• UPC Code : 088381-764629

What our Experts Think

• Corded‑Level Drilling Power – Brushless motor paired with Makita 40V max XGT battery delivers the torque and drilling performance needed for heavy concrete and masonry applications without the cord hassles.

• Advanced Safety & Control – AFT automatically cuts motor power if the bit binds, reducing kickback risk, while the variable speed dial lets you match speed to the job.

• Reduced Vibration Comfort – AVT counterbalance system and vibration‑absorbing handles help cut fatigue during prolonged use.

• Dust Management Ready – Compatible with AWS dust extraction systems and on‑board extractor options for cleaner work and OSHA Table 1 compliance (extractor sold separately).

• Job‑Site Durability – Extreme Protection Technology improves resistance to dust and moisture, extending tool life in tough environments.

• All‑Inclusive Kit – Includes 40V max 4.0 Ah battery, rapid charger, side handle, grease, towel, and tool bag so you’re ready to work right out of the box.

Q&A

Q: What is the Makita GRH08M1?
A: A 40V Max XGT brushless cordless 1‑3/16″ SDS‑PLUS AVT rotary hammer kit with AWS capability, designed for heavy‑load concrete drilling and chipping.

Q: What’s included in the kit?
A: The kit includes the rotary hammer, a 40V Max XGT 4.0Ah battery, rapid charger, side handle, grease, cloth, and tool bag.

Q: What performance features does it have?
A: Brushless motor with constant speed under load, overload protection, and variable speed for efficient performance on tough materials.

Q: Does it reduce vibration?
A: Yes — advanced anti‑vibration technology (AVT) and vibration‑absorbing handles help reduce user fatigue.

Q: Can it work with dust extractors?
A: It supports dust extraction and Auto‑Start Wireless System (AWS) for wireless on/off control with compatible extractors (transmitter sold separately).

Q: What drilling capabilities does it offer?
A: Accepts SDS‑PLUS bits for drilling up to 1‑3/16″ in concrete, with variable blows per minute and no‑load speed for control.

Q: What applications is it ideal for?
A: Suited for concrete drilling, anchor holes, chiseling, and masonry work where cordless mobility is needed without sacrificing power.

Maintenance Tips

• Clean bits & tool housing after every use to prevent dust buildup.

• Lubricate gearbox/chuck per manual to maintain smooth operation.

• Inspect bit shank and SDS components for wear or damage.

• Keep vents clear to avoid overheating and maintain airflow.

• Tighten all fasteners regularly to ensure safe operation.

• Maintain battery health—clean terminals and charge properly.

• Store in a dry, cool place to protect electronics and seals.

• Perform quick pre‑use checks for function and safety.