Threading Insert FANAR 16 ER 3.5 ISO BMA for External Threading

FANAR Threading Insert 16 ER 3.5 ISO BMA is a replaceable cutting insert engineered for external threading on lathes. Designed to fit holders that accept ER-style inserts and to generate threads conforming to ISO geometry, this insert is intended for precision turning where repeatable, accurate external thread profiles are required. The insert’s profile and cutting edges are optimized for producing consistent ISO-compliant thread forms across a range of common machining materials.

Advantages

The insert provides repeatable ISO thread geometry and is compatible with ER-style external threading holders, enabling quick replacement and reduced downtime. Its design supports stable cutting action and predictable chip formation, which helps maintain thread quality over multiple insert life cycles. The standardized form simplifies tooling selection for ISO-thread turning operations and assists in achieving dimensional consistency between workpieces.

Suitable for

• External threading on lathes using ER-style insert holders
• Production and repair of ISO-standard external threads
• Turning of steel, stainless steel and common alloy materials where ISO thread form is required
• Operations requiring quick insert changes and consistent thread repeatability

Key specifications

• Insert style: ER-style external threading insert
• Thread form: ISO thread geometry
• Size designation: 16 ER 3.5 indicating insert dimensions and thread pitch compatibility
• Application: replaceable cutting insert for external threading
• Compatibility: fits holders designed for ER-style threading inserts

How to use

Mount the insert into a compatible ER-style external threading holder and secure it according to the holder manufacturer’s torque specification. Align the tool and workpiece so the insert engages the former turning diameter at the correct lead and depth for ISO thread generation. Use appropriate spindle speeds and feeds matched to the workpiece material and the specified 3.5 profile parameters; perform finishing passes as needed to achieve the required thread tolerance. Inspect thread form and dimensions after machining and replace the insert when wear affects thread accuracy or surface finish.

Usage recommendations

Select coolant or cutting fluid and machining parameters based on the workpiece material to control temperature and chip evacuation. Verify holder rigidity and tool overhang to minimize vibration. For best results, follow the lathe and holder manufacturer’s guidance on speeds, feeds, and clamping and perform trial cuts when introducing the insert into a new setup.