Scientific Cutting Tools AS5202-04S Porting Tool Carbide

Product Description

The SCIENTIFIC CUTTING TOOLS AS5202-04S is a carbide-tipped porting tool designed to machine O-ring boss port faces and pilot bores in hydraulic and pneumatic tube fittings. It produces a 0.8880-inch spotface diameter with a 7/16-20 UNJF port thread size, conforming to AS5202 and MS33649 standards. The straight, 3-flute cutting geometry delivers clean, flat seating surfaces in a single operation. The bright, uncoated carbide-tipped construction handles ferrous and non-ferrous workpieces found in fluid power and aerospace-adjacent fabrication environments. Machinists and tool-and-die professionals performing tube port prep work rely on this tool for consistent, repeatable results.

This porting tool is intended for use on tube assemblies with a 1/4-inch outside diameter and a Tube Dash Number of 4. It is suited for shop or field porting operations where AS5202 and MS33649 port geometry compliance is required. The plain pilot style and straight shank mount in standard drill press, milling machine, or hand-held power tool setups. Typical applications include fluid power system fabrication, hydraulic manifold porting, and tube fitting seat preparation in industrial and aerospace maintenance environments.

Key Features

• Carbide-tipped construction for durability across ferrous and non-ferrous materials
• 0.8880-inch spotface diameter machines a flat, accurate O-ring boss seating surface
• 7/16-20 UNJF port thread size per AS5202 and MS33649 standards
• 3-flute straight flute design for clean chip evacuation and surface finish
• Plain pilot with 0.3920-inch minimum and 0.4565-inch maximum pilot diameter for positive tool alignment
• 1/2-inch straight shank fits common drill and milling chucks without special toolholders

Compatibility

Designed for tube workpieces with a 1/4-inch outside diameter (Tube Dash 4), conforming to AS5202 and MS33649 port specifications. Suitable for O-ring boss port machining in hydraulic and pneumatic tube fitting applications where UNJF thread geometry is required.

Installation Notes

This tool is installed and operated by machinists or maintenance technicians performing port facing operations. Secure the straight shank in a rigid drill press, mill, or appropriate power tool chuck before use, and verify pilot diameter fits the pilot bore before engaging the cutter. Always power down and de-energize the workpiece assembly before machining. Follow applicable shop safety standards and manufacturer speed-and-feed recommendations for carbide tooling on the specific workpiece material.