Description
Overview:
The Gear Box Assembly is a genuine replacement part for Hitachi/Hikoki cordless combi and impact drills, engineered to restore smooth, reliable drive in your tool. It transfers power from the motor to the chuck, supporting the drill's torque delivery and speed ranges as designed by the manufacturer. Built with a robust metal housing and steel gearing for durability, it is made to cope with frequent use on site or in the workshop. This assembly is designed specifically for the DV18DL2 and DV18DSDL models to ensure correct alignment, mesh, and performance without modification. Supplied as an OEM component under part number 334445, it helps eliminate symptoms such as gear slip, rough running, and loss of power, returning your drill to dependable service.
Key Features:
- Genuine Hitachi/Hikoki OEM replacement (334445) for an exact fit on specified models
- Durable metal construction with steel gear train for long service life under load
- Restores smooth power transmission and consistent torque output
- Factory-assembled unit to reduce fitting time and minimise downtime
- Direct swap using original fasteners and seals from the host tool
- Designed to work with the drill's existing clutch and hammer mechanisms
- Helps maintain correct gear ranges and performance as per the original design
- Suitable for professional trades, maintenance teams, and DIY repairs
Typical Applications:
Used to replace a worn or damaged gearbox in Hitachi/Hikoki DV18DL2 and DV18DSDL drills. Ideal when the tool exhibits grinding, slipping under load, irregular speed changes, or reduced torque. Common in high-demand drilling and screwdriving tasks in timber, metal, plastics, and for percussion drilling in masonry when used in hammer mode.
Also known as:
Drill gearbox, gear train assembly, transmission assembly, drive unit, speed selector gear unit, combi drill gearbox, impact drill gear unit.
Fits Models:
DV18DL2, DV18DSDL
Alternate Part Numbers:
334445
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