8mm x 70mm Through-Hole Boring Bit, Left Hand

8mm Through-Hole Boring Bit For Precise Cabinet Work

8mm x 70mm through-hole boring bit delivers an 8mm diameter cut over a 70mm boring length, so cabinet and fixture holes stay consistent from part to part on production setups. The left hand design means the tool is built to rotate counter clockwise, which matches left hand spindles on many dedicated boring machines used in woodworking shops. As a boring bit from Amana Tool, it is positioned for professional cabinet, furniture, and fixture work where repeatable hole sizing is critical. The bit is designed for blind hole drilling for European style concealed hinges, which lets you prepare hinge cup and related holes in the same drilling workflow. It is also designed for RTA fittings and 32mm systems, so it supports line-boring style layouts used in frameless cabinet construction and adjustable shelf patterns.

Key Boring Bit Details That Support Clean Results

• The 8mm cutting diameter focuses the bit on hardware requiring this exact hole size, which streamlines hinge, fitting, and system layout choices around a single boring setup.
• The 70mm through-hole length gives enough reach for deeper drilling tasks, which helps when boring through thicker stock or creating consistent pass-through holes in cabinetry components.
• The left hand rotation design matches spindles that turn counter clockwise, so the bit tracks correctly in machines built for left hand tooling without fighting the cut.
• The bit is specified as a boring bit within router bits class, which positions it for controlled, guided drilling rather than freehand work, keeping holes aligned to fences and stops on machines.
• The SAP description "BORING BIT, 8MM LEFTHAND" and manufacturer part 414008 clearly identify the exact configuration, which simplifies reordering the same tool for multiple machines or crews.

Mounting This Boring Bit In Fixed Drilling Setups

The boring bit is designed for use in boring machines with a 10 mm shank, so it fits spindles sized to accept 10 mm tool holders common to multi-spindle and line-boring equipment. It is also designed for drill presses with a 3/8" shank, which ties the tool directly to typical drill press chucks used in many woodworking shops. The manufacturer states it is not for use in portable drills or routers, which keeps the tool in rigid, column-guided setups where feed is controlled by the machine rather than by hand movement.

How This 8mm Left Hand Bit Fits Cabinet Work

Use In European Hinges, RTA Fittings, 32mm Systems

The boring bit is designed for blind hole drilling for European style concealed hinges, so it supports the hinge layouts used on many modern cabinet doors where hardware is hidden inside the case. Because it also serves RTA fittings, the same 8mm x 70mm geometry can be applied when preparing panels for ready-to-assemble connections in cabinet and furniture components. Design intent for 32mm systems ties the bit to standardized hole spacing used in frameless cabinets and adjustable shelving, allowing the same bit to handle line-boring runs and related hardware positions. This combination of European hinges, RTA fittings, and 32mm systems means one dedicated boring tool addresses several common cabinet construction patterns in woodworking production.

Left Hand Rotation And Machine-Based Drilling Control

The left hand construction is built for rotation counter clockwise, aligning with left hand spindles on boring equipment so the cutting edges engage the work as intended. Using a boring machine with a 10 mm shank connection or a drill press with a 3/8" shank places the bit in rigid, guided columns, so holes follow the machine travel for straight, square bores. The explicit direction that the tool is not for portable drills or routers keeps it tied to machines designed for boring operations, which supports cleaner entry and exit as stock is fed at controlled rates. In practice, this alignment between left hand rotation, fixed machine mounting, and purpose-built drilling applications helps maintain hole accuracy across runs of hinge, fitting, and system holes.

Common Questions About The 414008 Boring Bit

Selecting This 8mm Left Hand Bit For Your Setup

The Amana Tool 8mm x 70mm through-hole boring bit, left hand, brings an 8mm diameter, 70mm length, and counter clockwise rotation together for hinge, RTA fitting, and 32mm system work. With options for boring machines using a 10 mm shank and drill presses using a 3/8" shank, it integrates into fixed drilling stations already present in many woodworking shops. Selecting this 414008 boring bit aligns hole size, rotation direction, and shank style around a single dedicated tool for European style concealed hinges, RTA fittings, and 32mm cabinet systems.