Seven-Tenths of a Millimeter. Zero Room for Guesswork.

Precision drilling is one of those modeling tasks where the smallest details can make the biggest difference. The Tamiya 74128 Fine Pivot Drill Bit combines a precise 0.7 mm cutting diameter with a reinforced 1.0 mm shank, delivering excellent stability and control when drilling delicate components.

Its clever stepped-shank construction is the secret to its performance. By making the shank thicker than the cutting tip, Tamiya has created a drill bit that fits securely into a compatible pin vise while helping minimize wobble and drilling deviation. The result? Cleaner, more accurately positioned holes, with improved resistance to breakage compared with conventional micro-drills of uniform diameter.

Manufactured from durable, shatter-resistant material, the bit features a high-quality cutting finish designed to produce clean holes in plastic, brass, metal, wood, and other suitable modeling materials.

For WWI aircraft enthusiasts, 0.7 mm is a particularly useful diameter for installing locating pins, preparing mounting points for landing gear components, and creating openings for miniature fittings. It's equally valuable when detailing cockpits, modifying plastic components, or fabricating custom parts for scratch-building projects.

With a 5.3 mm flute length and an overall length of just 21 mm, this compact drill bit is particularly suited to controlled, shallow drilling operations. A protective plastic storage case keeps the delicate cutting tip safe between modeling sessions.

Because when you're working in miniature, seven-tenths of a millimeter can make a world of difference.

Key Features

• Precision 0.7 mm cutting diameter for accurate micro-drilling.

• Reinforced 1.0 mm shank for secure mounting in compatible pin vises.

• Stepped-shank design helps minimize wobble and drilling deviation.

• Shatter-resistant construction improves durability compared with conventional fine drill bits.

• High-quality cutting finish for clean, accurately positioned holes.

• 5.3 mm flute length for controlled precision drilling.

• 21 mm overall length for compact, precise handling.

• Suitable for plastic, brass, metal, and wood with appropriate drilling techniques.

• Ideal for aircraft detailing, mounting points, miniature fittings, and locating pins.

• Excellent for scratch-building, conversions, and precision assembly work.

• Compatible with Tamiya 74050 Fine Pin Vise D and 74112 Fine Pin Vise D-R.

• Protective plastic storage case included.

When preparing mounting holes for miniature aircraft fittings or metal locating pins, first mark the intended position with a fine needle. Secure the 0.7 mm bit in a manual pin vise and rotate gently, keeping the tool perpendicular to the surface. For delicate components, drill before final assembly whenever practical, and test the fit before applying adhesive.

Please Note: Although the reinforced shank improves stability and resistance to breakage, the 0.7 mm cutting tip remains delicate. Avoid excessive pressure and sideways movement. This drill bit is intended primarily for shallow precision drilling. A compatible pin vise is required and sold separately.