Makita 80V max (40V max X2) XGT Brushless 70 lb. 1‑1/8" Hex AVT Breaker Hammer Kit, AWS Capable (8.0Ah) - GMH04PLX

Makita 80V max (40V max X2) XGT Brushless 70 lb. 1‑1/8" Hex AVT Breaker Hammer Kit, AWS Capable (8.0Ah) - GMH04PLX 

The 80V max (40V max X2) XGT 70 lb. 1-1/8" Hex AVT Breaker Hammer Kit, AWS Capable (8.0Ah) (model number GMH04PLX) delivers 53.7 ft. lbs./72.8 Joules of Impact Energy (0-870 BPM). The GMH04 delivers up to 70% faster breaking than corded* and is the most powerful cordless breaker in its class.

Makita once again breaks new ground with the new cordless XGT 70 lb. Breaker Hammer giving users a powerful and portable tool that can demolish up to an 8ft. x 6ft. x 4in. thick 5000 psi concrete slab using two fully charged 40V max XGT 8.0Ah Batteries (BL4080F).

Features

• OUTPOWER: Most Powerful Cordless Breaker in its Class
• OUTSMART: Delivers up to 70% faster breaking than corded*
• OUTLAST: Demolishes up to an 8ft. x 6ft. x 4in. thick 5000 psi concrete slab on a single charge
• Anti-Vibration Technology (AVT) is an internal counterbalance system along with vibration-absorbing handles that work together to reduce up to 30% less overall vibration*
• Auto-start Wireless System (AWS) utilizes Bluetooth technology for wireless power-on/off communication between tool and dust extractor (AWS Transmitter sold separately)
• Dust extraction capability with optional Makita Dust Attachment Kit
• Soft start suppresses start-up reaction for improved accuracy
• "Soft no-load" function automatically reduces the speed of the motor when idling to help increase tool life and performance
• Built-in Dual L.E.D. lights with an independent on/off switch illuminates the work area
• The digital communication within XGT optimizes performance to provide up to 2X longer sustained power under heavy-load applications

What our Experts Think

• Class-Leading Power & Speed – Rated as the most powerful cordless breaker in its class, it delivers 53.7 ft-lbs / 72.8 J impact energy with up to 70% faster breaking than corded alternatives, making demolition tasks far more efficient.

• Heavy-Duty Demolition Performance – Capable of demolishing an 8 ft × 6 ft × 4″ 5000 psi concrete slab on a single charge using two high-capacity batteries — ideal for stubborn masonry and tough job site breaks.

• Superior User Comfort – Anti-Vibration Technology (AVT) with vibration-absorbing handles reduces overall vibration by up to ~30%, lowering fatigue during long demolition sessions. 

• Smart & Job-Ready Features – AWS Bluetooth integration enables automatic tool start with compatible dust extractors; soft start and built-in dual LEDs improve control and visibility.

• Rugged, Cordless Convenience – Brushless motor and XGT platform provide reliable, cordless power without sacrifice — real productivity where cords can’t reach.

Q&A

Q: What is the Makita GMH04PLX?
A: A high-performance 80V max (40V max X2) XGT Brushless 70 lb. 1-1/8″ Hex AVT® Breaker Hammer Kit with AWS capability and two 8.0Ah batteries.

Q: How powerful is this breaker hammer?
A: Delivers 53.7 ft-lbs / 72.8 J impact energy with up to 870 BPM and breaks up to 70% faster than corded models.

Q: What batteries and charger are included?
A: Kit includes (2) 40V max XGT 8.0 Ah batteries and a rapid charger for extended runtime and quick charging.

Q: What comfort features does it have?
A: Anti-Vibration Technology (AVT) and vibration-absorbing handles reduce fatigue, plus built-in dual LED lights improve visibility.

Q: Is it AWS capable?
A: Yes — Auto-start Wireless System (AWS) capable for wireless on/off control with compatible dust extractors (transmitter sold separately).

Q: Where is this tool best used?
A: Ideal for concrete demolition, heavy-duty breaking, and job site work without the constraints of cords.

Maintenance Tips

• Grease per schedule — follow manual for AVT/hammer lubrication intervals.

• Inspect chisel & hex shank before use; replace worn bits.

• Check all fasteners regularly for tightness.

• Clean vents & housing to prevent dust buildup.

• Monitor battery health; clean terminals and charge correctly.

• Store in dry, cool place to protect electronics.

• Lubricate tool joints and moving parts as specified.

• Perform pre-job checks to ensure optimal performance.