Leitz Premium Industrial Dowel Drill Bit 35mm x 70mm HBRH Z=3
Premium 3-Flute
Boring Bit
Carbide-tipped industrial boring bit engineered for high-volume cabinet and panel production. Its 35 mm diameter, 70 mm overall length, Z3 cutting geometry, and HBRH right-hand configuration support clean hole entry, controlled chip removal, and stable production feed rates.
Main Product Description
The Leitz Premium HBRH 3-Flute Boring Bit L37281 is designed for high-volume panel processing, hinge-pocket drilling, and dowel-hole production. Its advanced Z3 cutting configuration distributes the cutting load across three edges, helping reduce vibration and support higher production feed rates than conventional two-edge designs.
With a 35 mm cutting diameter and 70 mm overall length, the tool is sized for common hardware-boring and blind-hole applications. Premium micro-grain carbide tips resist abrasive resins, adhesives, and dense binders found in melamine, MDF, particle board, composites, and hardwoods.
The HBRH right-hand geometry combines controlled axial shear with balanced cutting action to support clean surface entry and stable hole-wall quality. Correct toolholding, spindle alignment, feed programming, and runout control help protect the Z3 cutting edges and extend service intervals.
Best Fit Applications
Product Highlights
Z3 Flute Configuration
Three precision-ground carbide cutting edges distribute workload evenly to support stable drilling and increased feed capacity.
Micro-Grain Carbide
Premium carbide resists abrasive resins, glues, and binders found in melamine, MDF, particle board, and composite panels.
Controlled Surface Entry
Optimized perimeter cutting action helps establish the hole edge before core removal to reduce surface chipping.
Compatibility & Installation Notes
Confirm that the multi-spindle block, CNC chuck, or boring unit matches the required shank style before operation. Verify HBRH right-hand rotation in the machine setup, and inspect collet tension, toolholder runout, operating speed, feed rate, and drilling depth. Excessive runout or uneven clamping can accelerate wear or damage the Z3 carbide cutting edges.
Improve High-Speed Panel Boring
The Leitz Premium HBRH 3-Flute Boring Bit L37281 is engineered for high-speed panel optimization and precision hole production. Its 35 mm diameter, 70 mm overall length, Z3 cutting layout, and right-hand HBRH configuration support repeatable machining in double-sided melamine, veneered fiberboard, composites, and hardwoods.
By distributing material removal across three carbide cutting edges, the tool helps control heat generation, maintain surface quality, and extend operating intervals in intensive cabinet and millwork manufacturing schedules.