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The TOOL-FLO 553004RAC50E is a carbide threading insert designed for precision thread cutting in metalworking applications. Manufactured to the AC50E grade specification and processed with a PVD coating, this insert delivers consistent cutting performance in both internal and external threading operations. It is sized at insert size 3, with a tip-to-top measurement of 0.1330 inches and a cutting tip width of 0.0875 inches. The 4 TPI Acme thread standard and right-hand orientation make it a reliable choice for machinists and tool and die professionals who require repeatable thread geometry and edge durability.
This insert is part of the Flo-Lock series and is engineered for Acme thread profiles at 4 TPI. It supports both internal and external threading operations, making it suitable for a range of production and maintenance machining environments. Typical applications include lead screw threading, power transmission components, and other industrial fastener or mechanical thread work where the Acme profile is specified. The right-hand configuration follows standard lathe threading setups commonly found in job shops and production floors.
Designed as a replacement-style threading insert for FLA3R4 AC50E tooling setups within the TOOL-FLO Flo-Lock insert series, compatible with tool holders accepting size 3 FLA-style threading inserts.
Installation is performed by a qualified machinist following the tool holder manufacturer torque and clamping guidelines for size 3 inserts. Power down and lock out the machine before seating or replacing inserts. Inspect the insert pocket and clamping screw for wear before installation. Do not exceed the recommended depth of cut or feed rate specified for the Acme thread profile and workpiece material.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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