Scientific Cutting Tools MS33649-4R Porting Tool Reamer

Product Description

The SCIENTIFIC CUTTING TOOLS MS33649-4R is a porting tool reamer designed to prepare tube port faces and bores to precise dimensional standards required for AS 5202 and MS 33649 fittings. The tool produces a 0.888 inch spotface diameter and is compatible with 1/4 inch outside diameter tubing (Tube Dash 4). It features a straight 4-flute reamer pilot, a 30-degree seal angle, and a UNJF thread form, making it the correct tool for generating leak-free port geometry in hydraulic, pneumatic, and aerospace fluid system assemblies. Machinists and aerospace maintenance technicians use this tool to achieve the exacting surface finish and dimensional accuracy that AS 5202 and MS 33649 port standards demand.

This porting tool is intended for use on tube fittings and tube port applications requiring compliance with AS 5202 and MS 33649 standards. It is suited for work on metallic workpieces in aerospace, defense, and high-pressure fluid system maintenance environments. The bright uncoated finish is appropriate for use with cutting fluids on steel, aluminum, and similar machinable alloys. The 1/2 inch shank diameter is compatible with standard milling machine collets and drill press chucks commonly found in machine shops and MRO facilities.

Key Features

• 0.888 inch spotface diameter for AS 5202 and MS 33649 port geometry
• Compatible with 1/4 inch OD tubing, Tube Dash Number 4
• 30-degree seal angle matches MS 33649 port sealing requirements
• 4-flute straight reamer pilot for precise bore alignment and surface finish
• UNJF thread type for aerospace-grade fitting compatibility
• 1/2 inch shank diameter fits standard collets and chucks
• Bright uncoated finish suitable for use with cutting lubricants

Compatibility

Designed for tube port applications conforming to AS 5202 and MS 33649 standards, specifically for Tube Dash 4 fittings with 1/4 inch outside diameter tubing.

Installation Notes

This tool is installed and operated by machinists or aerospace maintenance technicians using a milling machine, drill press, or similar machine tool. Secure the 1/2 inch shank in an appropriate collet or chuck before use and ensure the workpiece is rigidly fixtured. Apply a suitable cutting fluid throughout the operation to protect tool life and achieve the required surface finish. Degrease and inspect the finished port before assembling fittings to verify dimensional compliance with the applicable standard.