CBN Square Turning Insert SNMN150716S05020

The YLHH SNMN150716S05020 square PCBN insert is built for heavy-duty interrupted cutting, rough hard turning, and groove machining of hardened steel (HRC 45–65) and cast iron. The 15.875 mm square geometry, T-land honed edge preparation, and Grade FB-1 (~65% CBN) provide maximum edge strength and impact resistance under demanding conditions.

Key Features

• 90° square cutting edges — four usable corners for economy
• T-land edge honing reduces chipping in interrupted cuts
• Grade FB-1 high-CBN content for roughing and heavy feeds
• 7.94 mm (16) thickness for maximum rigidity
• Reinforced protective case packaging for field use

Recommended Cutting Parameters

• Workpiece hardness: HRC 45–65 or cast iron HB 200–400
• Cutting speed (Vc): 60–150 m/min (reduce for heavy interruption)
• Feed rate (f): 0.10–0.45 mm/rev
• Depth of cut (ap): 0.5–4.0 mm

Typical Applications

• Rough hard turning of large gears and sprockets
• Heavy facing on hardened machine beds and plates
• Groove and parting operations in hardened shafts
• Cast iron roll and cylinder rough machining

Tool Holder Compatibility

• ISO SNMN 150716 standard square insert seat
• Compatible with SNMN, SCMT-style square insert holders
• Ensure rigid setup and minimum overhang for interrupted cuts