Milling Machine

Bridge Port Mill

Make: Hardinge

Model: Bridgeport

Ace: Sofia Ayesa (sayesa23@georgefox.edu).

Location: Machine Shop

Description

The Bridgeport Series 1 Mill is a vertical mill used to mill various materials into desired shapes and sizes. It can also be used to perform special functions such as drilling, chamfering, reaming, fly cutting, and many more. Some examples of items made from mills are piston bore holes, valve plates, gears, and even your own tools. This is done by using a rotary cutter to remove material by advancing a cutter into a work piece in varying direction along three axes. Milling covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes for machining custom parts to precise tolerances. The video below shows a part being machined by a CNC mill which is a computer driven mill, but still demonstrates the milling process.

Documentation

Terminology

• Spindle - The rotating shaft, driven by the motor, that holds the cutting tools.
• Quill - The part of the vertical milling machine that raises and lowers cutting tools held in the spindle.
• Endmill - A common machining tool having cutting teeth on the end of a cylindrical shank and usually spiral blades on the lateral surface. Because of this geometry it can cut in any direction.
• Facing - The process of cutting a flat surface perpendicular to the axes of the milling cutter. Often this is done on the initial piece of raw stock as the first step in the milling process.
• Deburring - To neaten and smooth the rough edges or ridges of a part after it has been machined.
• Edge finding - The process of using an edge finder to align the coordinate system of the mill with the corner of your part.

Training

Overview

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Demonstration

For the demonstration, you will face a piece of aluminum stock, drill a hole in the center, ream the hole, and deburr all of the edges. Reference the video below to see what this should look like.

General Procedure

This video contains specific information for using the Mills in the Maker Hub as well as a basic overview of what will be expected in your live demonstration.

Safety

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Certification

Foxtale Quiz

Maintenance

General maintenance

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Specific Maintenance Tasks

Maintenance Procedure	Frequency	Done By
Sample	Sample	Sample

• Boring Setup
• Flycutter Surfacing
• Conventional Vs. Climb Milling
• Stepped Drill Bits
• Countersink Drill Bits
• Countersink Deburring Tool
• Rotary Table Center