11L004 - Walter 1/4-Inch Shank Mandrel for 3/8-Inch Arbor Wheels

Secure Mounting for Precision Grinding

The Walter 11L004 Mandrel is an essential accessory for metalworkers and fabricators who rely on precision and safety when using abrasive wheels. Designed and manufactured by Walter Surface Technologies, a leader in surface treatment solutions, this mandrel is engineered to bridge the gap between your power tool and your abrasive media. Specifically, it converts a standard die grinder or drill with a 1/4-inch collet into a compatible driver for abrasive wheels requiring a 3/8-inch arbor.

In industrial environments, the integrity of your tool accessories is just as critical as the tool itself. A poorly manufactured mandrel can lead to wheel run-out, excessive vibration, and potential safety hazards. The Walter 11L004 is precision-machined from high-grade steel to ensure perfect concentricity. This balance is vital when spinning 3-inch or 4-inch wheels at high RPMs, as it protects both the operator from hand-arm vibration syndrome and the workpiece from chatter marks or uneven finishes.

Optimized for Walter Abrasives

While this mandrel is versatile enough to work with various brands, it is the recommended mounting hardware for Walter's renowned Two-in-One™ flap wheels and other non-woven abrasive wheels in the 3-inch to 4-inch range. The 3/8-inch arbor fits snugly into the wheel's center hole, while the included washers and locking nut ensure the wheel remains firmly in place, even under the torque of heavy stock removal or aggressive deburring tasks.

Key Specifications and Utility

The 1/4-inch shank is the industry standard for pneumatic die grinders and electric straight grinders, making this accessory universally compatible with most professional fabrication tools. Its robust construction resists bending and wear, providing a long service life even in demanding shop environments. Whether you are cleaning welds, deburring cut edges, or blending surfaces in hard-to-reach areas, the 11L004 mandrel provides the stability you need for consistent results.

Safety Note: Always ensure that the maximum RPM rating of the mounted abrasive wheel meets or exceeds the free speed of the tool being used. This mandrel is designed to handle the mechanical stresses of grinding, but proper speed matching is essential for safe operation.