ER/L-W: External Whitworth (BSW, BSF, BSP), full profile laydown threading inserts.
ER/L - Ground periphery and rake
ERB - With a chipformer and peripherally ground
ERM - With a chipformer.

Grade: IC908
A hard, fine grain substrate with excellent chipping resistance, combined with a new TiAlN PVD coating. Provides high wear and oxidation resistance. Recommended for a very wide range of materials applications and machining conditions.
ISO Range - P/M/K: (P15-P30)(M20-M30)(K20-K40)
ISO Range - H/S/N: (H10-H20)(S10-S25)
Grade or Coating Type: PVD
Coating Layers: TiAlN