3 Mm -3/4mm SHANK Carbide Endmill 60 HRC 4 Flutes Size:3 mm in 4 mm shank pack of 2 you need to run trials

you need to run trials to find the most suitable parameters

BT40 BCA BORING BAR 62-165L

It's equivalent to RCMT/RCMX1204

so you can just check descriptions of size from other brands to fix this insert

50/63/80/100/125/160 Mm Bull Cutter For Die And Mould Facing Cutter Suitable To RPMT1204 R6 Of Mostly Brand

3 Mm -3/4mm SHANK Carbide Endmill 60 HRC 4 Flutes Size:3 mm in 4 mm shank pack of 2 you need to run trials3 Mm 3 4mm SHANK Carbide Endmill 60 HRC 4 Flutes, PACK OF 2 75 MM long is a pack of 1 Solid Carbide cutters are used to machine Hard Materials, Steel, Alloy Steel, Cast iron, stainless steel, and many other material grades. Bronze TiSiN Coating, Endmill for Better Life, and wear resistance. 35 Degree Helix Angel, Grain Size 0. 51mUsed for Face Mill, Shoulder mill, side mill, etc., Plastic Packaging for non breakable packing 55 HRC AND 60 HRC LOOK