SK Setting Ring – 25 mm

This SK 25 mm Setting Ring is a precision reference tool used for calibrating bore gauges, internal micrometers, and other internal measurement instruments. Setting rings provide a stable, repeatable reference size, ensuring accurate measurements in machining, inspection, and metrology environments.

The 25 mm size is one of the most commonly used calibration standards in workshops, covering the 18–35 mm bore gauge range. SK rings are known for their accuracy, stability, and reliable Japanese manufacturing quality.

Brand Information

SK (Shinwa Koki) is a respected Japanese manufacturer of metrology tools and reference standards. Their setting rings are widely used in machining, automotive, aerospace, and precision toolmaking environments due to their consistent accuracy and durable construction.

Features and Performance

• 25 mm nominal size — standard calibration size for small‑bore gauges
• High‑accuracy reference surface — stable and repeatable
• Precision Japanese manufacturing
• Ideal for bore gauges, internal micrometers, and inspection setups
• Common workshop size with strong resale demand
• 0.0005mm accuratecy

Included

• 1 × SK Setting Ring – 25 mm

• No case or accessories unless shown in photos

Specifications

Keywords

SK setting ring; 25 mm ring; bore gauge calibration; Japanese metrology; machinist reference tool; inspection standard; precision measuring tool.