Description
Overview:
This Genuine Makita piston (part no. 419004-5) is a precision-made replacement for the impact mechanism in Makita rotary hammers. Built from durable, high-quality metal, it restores the air-driven hammer action that delivers striking power for drilling and chiselling in concrete, masonry, and stone. The piston maintains compression and smooth reciprocation inside the cylinder, helping your tool run efficiently and reliably under site conditions. Engineered to Makita's exact tolerances for a secure fit, it is suitable for the HR4011C and HR4001C, as well as selected compatible models. Fitting a fresh piston can resolve loss of impact energy, irregular blows, or reduced performance caused by wear, ensuring your rotary hammer returns to consistent output for demanding tasks.
Key Features:
- Genuine Makita part for assured compatibility and reliability (419004-5)
- Precision-machined metal construction for durability and smooth operation
- Restores hammering power, blow consistency, and tool efficiency
- Direct-fit replacement for straightforward maintenance with no modifications
- Designed to Makita specifications for sealing and correct reciprocation
- Helps reduce vibration and erratic impact caused by a worn piston
- Supports longer service life when installed in a clean, well-lubricated cylinder
- Suitable for professional trades and DIY users working on concrete and masonry
- Backed by Makita's parts support network for ongoing serviceability
- Reliable choice for preventative maintenance or repair after heavy use
Typical Applications:
Replacing a worn or damaged piston to recover impact performance in rotary hammers used for anchor-hole drilling, chasing, chiselling, demolition, and refurbishment work on concrete, block, and stone in construction, facilities maintenance, and trade environments.
Also known as:
Hammer drill piston, rotary hammer replacement piston, impact piston, percussion piston, piston assembly for rotary hammer.
Fits Models:
DHR400ZK, DHR400ZKU, HR4001C, HR4011C
Alternate Part Numbers:
419004-5, 4190045
