The Ralli Wolf DGL21 is an extended-reach pneumatic die grinder built for cleaning up hard-to-reach areas inside castings, forgings and welded assemblies. Its elongated body extends into deep bores, cavities and recessed areas that a standard-length die grinder can't access — a common need in foundries and forging units working with hollow or complex-shaped parts.

A powerful motor holds its speed under load rather than bogging down, keeping material removal consistent even during extended grinding passes inside tight casting cavities. Running at 21000 RPM with a 6mm capacity, the DGL21 is built for rugged, repeated use across demanding industrial environments.

Its listed applications are specific to foundry and fabrication workflows: cleaning up holes in castings and forgings, cleaning welds, light fettling (removing flash and rough edges from cast parts) and polishing. Running on a 3/8" NPT air inlet, it draws 27 cfm — among the higher consumption figures in the Ralli Wolf air tool range — reflecting its higher speed and extended-reach design. At 2.50kg and 315mm overall length, it's noticeably longer and heavier than a standard die grinder, built specifically for reach over portability.

Key Features

• Extended body for reach into deep bores, cavities and recesses
• Powerful motor maintains high speed under load
• High-speed 21000 RPM free speed
• 6mm capacity suited to casting and forging cleanup work
• Rugged construction for foundry and forging environments
• 315mm overall length for extended reach applications

Technical Specification

Application

• Cleaning up holes and cavities in castings and forgings
• Weld cleaning on fabricated parts and assemblies
• Light fettling — removing flash and rough edges from castings
• Polishing metal surfaces after grinding or fettling
• Reaching deep or recessed areas standard grinders can't access