Portland Community College | Portland, Oregon

Sharpening Drill Bits - When drilling on the drill press, the drill bits become dull and should be machine ground to insure perfect cutting edges. However, there are situations where it is necessary for the machinist to sharpen a drill bit by hand. In this packet, the student will learn how to sharpen a drill bit by hand.

Sharpening Various Cutters - The universal Tool and Cutter Grinder is designed primarily for the grinding of cutting tools such as milling cutters, reamers, and taps. Its universal feature and various attachments permit a variety of other grinding operations to be performed. In this module the student is introduced to the sharpening and reconditioning of formed relieved cutters, reamers and taps.

Grinding Lathe Tools - A machine tool is no more efficient than its cutting tools. Nothing in shop work should be given more thoughtful consideration than cutting tools. Time is wasted if an improperly ground tool is used. To machine metal efficiently and accurately, it is necessary that the tool bit have well-supported cutting edges, and that it be ground for the particular metal being machined. In this packet, the student will learn how to sharpen lathe tools.

Sharpening End Mills / Ends - In this module the student is introduced to the sharpening and reconditioning of end mill ends or faces.

Sharpening End Mills / Sides - In this module the student is introduced to the sharpening and reconditioning of end mill sides. 

PREREQUISITE SKILLS AND KNOWLEDGE:
MCH100  

The student will be able to safely sharpen and/or recondition various cutting tools, using the various grinding machines suitable to obtain manufacturer specifications.

This course is based on performance outcomes. The following performance outcomes are based upon established industry standards. The student will demonstrate knowledge and understanding through the following activities:

• With the proper tools and equipment, the student will be able to sharpen drills to specification.

• Sharpen milling cutters and reamers to specification.

• Grind various lathe tools to specification.

• Sharpen end mill ends and sides to specification. 

TOOL SHARPENING will be presented by means of audio-visual presentations, demonstrations, lab experiences, and research activities. The course activities and design emphasize the development of skills and knowledge outcomes prescribed by established industry standards. The identified outcomes will be achieved by means of individual and team activities.  

POLICY - Student performance measurements are based on established industry standards. The various areas of study during the course will be evaluated by a variety of activities. Typical of those activities are the following;

1. READING ASSIGNMENTS - Information sheets, textbooks, journal articles and the learning resource center are potential sources of information that the student will reference as directed in the modules identified in the introduction. 

2. PRACTICE - Completion of tasks and projects identified in the reading assignments, information sheets, journal articles and textbooks.

3. SELF-ASSESSMENT - Checking and evaluating the students understanding and knowledge gained through the reading assignments and practices typically done through a practice evaluation.

4. LAB ACTIVITIES - Participation in structured laboratory exercises with the emphasis on developing skills or increasing expertise in the areas of study identified in the module packets.

5. FINAL ASSESSMENT - An assessment in the form of a written exam and/or practical application that addresses the subject areas identified in the module packets.

TEXT:

Machinery's Handbook

Technology of Machine Tools by Krar, Oswald, and St.Amand

Machine Tool Practices, by Kibbe, Neely, Meyer, and White