Threading Insert FANAR 16 ER 1.25 ISO BMA — 16ER1.25ISOBMA

FANAR threading insert 16 ER 1.25 ISO BMA (16ER1.25ISOBMA) is a precision cutting insert designed for external and internal thread turning on CNC lathes and turning tools. It follows the ISO metric thread profile with a 1.25 mm pitch and ER 16 size, enabling consistent thread geometry and repeatable results when machining steels and common alloys that require ISO 1.25 metric threads.

Advantages

The insert is manufactured to tight tolerances, providing reliable flank geometry and stable thread form during high-speed and conventional turning operations. Its ISO-compliant profile and defined pitch ensure compatibility with standard threading cycles on CNC controls. The ER 16 size offers a balance between rigidity and accessibility when threading in a range of part diameters. Designed for use with appropriate tool holders, the insert promotes predictable tool life and repeatable thread quality across production runs.

Suitable for

• External metric thread turning with 1.25 mm pitch
• Internal thread turning where insert size and profile fit the holder
• CNC lathe threading cycles and manual lathe operations using ISO thread form
• Machining of steels and common non-exotic alloys requiring ISO 1.25 threads

Key specifications

• Thread profile: ISO metric
• Thread pitch: 1.25 mm
• Insert size: ER 16
• Application: external and internal thread turning
• Compatibility: designed for standard turning tool holders suitable for ER 16 inserts

How to use

Mount the insert into a compatible tool holder rated for ER 16 inserts, ensuring correct orientation and secure clamping. Set the lathe to the appropriate threading cycle for ISO metric threads with a 1.25 mm pitch. Use recommended cutting speeds, feeds, and coolant for the workpiece material; perform trial cuts to verify thread form and depth. For internal threading, ensure sufficient clearance and correct approach angles to avoid chatter or interference. Inspect the first produced threads and adjust tool offset or depth-of-cut as needed to achieve the required fit and tolerance.

Usage recommendations

For best results, select cutting parameters based on the workpiece material: use moderate cutting speeds and steady feed when machining steels, ensure effective chip evacuation and coolant application, and verify holder rigidity to minimize vibration. Regularly inspect insert condition and replace when wear affects thread profile accuracy.