BIG Daishowa Adjustable Tapping Head MT2

Description

The BIG Daishowa Adjustable Tapping Head with an MT2 taper (marked as ACCU 412) is a precision tool designed for tapping operations on drilling or milling machines. It features a Morse Taper No. 2 (MT2) shank for secure mounting on compatible spindles, commonly used in manual machining setups. The head has a 50 mm diameter body with a graduated scale on the adjustment ring, marked in 0.1 mm increments, allowing for precise torque adjustment to prevent tap breakage.

The tapping head includes a collet system for holding taps, with the primary collet accommodating tap shank diameters up to 7 mm (typically for M3-M12 taps). A second collet is included to expand the range, likely supporting larger tap sizes up to 10 mm shank diameter (M6-M16 taps), depending on the collet specification. The head’s total length, including the shank, is 140 mm, and it weighs approximately 1 kg, providing stability during operation.

This used unit shows signs of wear, including scratches and surface marks on the body and shank, but remains functional. The adjustable clutch mechanism allows for forward and reverse tapping, with a quick-release feature for easy tap changes. Made by BIG Daishowa, a respected Japanese manufacturer, this tapping head is a reliable choice for machinists needing a versatile tapping solution. No additional accessories, such as a wrench, are included beyond the extra collet.

Features:

• Shank: Morse Taper No. 2 (MT2)
• Body diameter: 50 mm
• Torque adjustment: Graduated scale in 0.1 mm increments
• Primary collet capacity: Up to 7 mm shank (M3-M12 taps)
• Extra collet included: Supports larger sizes, up to 10 mm shank (M6-M16 taps, depending on collet)
• Total length: 140 mm (including shank)
• Weight: Approx. 1 kg
• Adjustable clutch for forward and reverse tapping
• Quick-release collet system for tap changes
• Model: BIG Daishowa ACCU 412
• Used condition with wear (scratches and surface marks on body and shank)
• Includes second collet for additional tap sizes
• No additional accessories (e.g., wrench) included