Scientific Cutting Tools MS33649-3R Porting Tool Reamer

Product Description

The SCIENTIFIC CUTTING TOOLS MS33649-3R is a porting tool reamer designed for precision spotfacing and port preparation on tube fittings. It machines a 0.805-inch spotface diameter on workpieces with a 3/16-inch tube outside diameter, creating a clean, flat seating surface for AS 5202 and MS 33649 standard fittings. The reamer pilot ranges from a minimum of 0.339 inches to a maximum of 0.393 inches in diameter, with a pilot length of 0.532 inches. Three straight flutes and a 30-degree seal angle ensure accurate, repeatable port geometry. The tool weighs 0.25 pounds and is finished bright/uncoated for general shop use. It is installed by machinists and precision fabricators working on hydraulic, pneumatic, or fluid system tubing assemblies.

This porting tool is used when preparing tube port seats on metal workpieces requiring UNJF thread-compatible fitting interfaces. It is sized for Tube Dash 3 applications, meaning 3/16-inch OD tubing, and conforms to AS 5202 and MS 33649 standards. Typical applications include aerospace, defense, and industrial fluid system fabrication where port geometry must meet controlled dimensional standards. The tool is suited for bench machining or drill press operations where controlled feed and alignment can be maintained.

Key Features

• 0.805-inch spotface diameter for accurate AS 5202 and MS 33649 port seating surfaces
• Reamer pilot type with minimum 0.339-inch and maximum 0.393-inch pilot diameter for positive alignment
• 3 straight flutes for clean, consistent cutting action
• 30-degree seal angle matches standard tube fitting port geometry
• UNJF thread type compatibility for standard aerospace and industrial fittings
• Bright/uncoated finish - suitable for use on aluminum, steel, and similar workpiece materials

Compatibility

Designed for use on tube workpieces requiring Tube Dash 3 port preparation conforming to AS 5202 and MS 33649 standards, with 3/16-inch OD tube outside diameter and UNJF thread form.

Installation Notes

This tool is used by machinists or qualified fabricators performing port spotfacing operations. Secure the workpiece and align the pilot carefully before applying feed pressure to avoid bell-mouthing the port. Use a drill press or milling machine with appropriate speed and feed for the workpiece material. Ensure the work area is clear of chips and that cutting fluid is applied as appropriate for the material being machined.