NIKKEN Jig Boring Head (3–28 mm) with PEACOCK Dial Indicator — MT4 Taper + M14 Retainer

This NIKKEN JBD1 Jig Boring Head is a high‑precision Japanese‑made boring attachment designed for jig borers, milling machines, and toolroom setups requiring accurate hole sizing and micro‑adjustment capability. With a true boring diameter range of 3–28 mm, this head is ideal for fine boring, finishing, and precision hole enlargement.

The unit is fitted with an MT4 taper shank and includes an M14 retainer thread, allowing secure drawbar retention in machines that use threaded MT4 tooling. This combination provides excellent rigidity and alignment for precision boring operations.

Paired with a PEACOCK dial indicator, the setup offers clear, responsive feedback for fine adjustments, making it suitable for toolmaking, die work, mold machining, and precision engineering tasks where tight tolerances are required.

Features and Performance

• 3–28 mm boring diameter range — Accurate micro‑adjustment for small to medium bores.
• MT4 taper shank with M14 retainer — Secure drawbar retention and rigid spindle connection.
• Dial‑adjustable head — Smooth, controlled movement for precise diameter setting.
• 10 mm tool‑bore capacity — Accepts standard boring bars and tooling.
• PEACOCK dial indicator — Clear, responsive readings for fine adjustment.
• Locking mechanism — Holds settings securely during machining.
• Japanese build quality — Reliable, accurate, and workshop‑ready.

Included

• 1 × NIKKEN Jig Boring Head (3–28 mm, MT4 + M14 retainer)

• Original NIKKEN packaging.

• No cutting tools and additional accessories included.

Specifications

Keywords

NIKKEN boring head; JBD1; DJ3; jig boring head; MT4 taper; M14 retainer; PEACOCK dial indicator; 3–28 mm boring head; Japanese tooling; precision boring tool; machinist toolroom equipment; metrology setup.