Portland Community College | Portland, Oregon

Upon completion of the course students should be able to:

• Accurately list and calculate the proper speeds for the tools used in the course.
• Accurately set up and perform the following operations on a single work piece according to the print specifications: drill, ream, counterbore, spotface, countersink, hand tap and power tap.
• Accurately lay out a work piece according to the print specifications, calculate proper speeds and feeds, and perform drill and power tap operations on the radial arm drill press.

MCH 160 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. Students are required to complete practice activities with 100% competency.

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. Students are required to complete final assessment activities with 85% competency.  

Drilling machines & Operations consists of the following modules:

Drilling on the Drill Press - Holes are often machined in a work piece by using a drill mounted in a drill press. In this module, the student will learn to drill holes in a work piece on the drill press.

Reaming on the Drill Press - Holes are often machined in a work piece to an accurate size and smooth finish by using a reamer mounted in a drill press or by hand. In this module, the student will learn to ream holes in a work piece on the drill press and by hand.

Counter Boring/Spot facing/Counter Sinking on the Drill Press - The head of a cap screw or nut can be seated properly only if the mating surface is flat or cone shaped. Whether the mating surface is exposed or recessed, the machinist must insure that it is flat or cone shaped by countersinking or counterboring (for recessed surfaces) or spot facing (for exposed surfaces). Spot facing is done around the hole to provide seat for the screw head or nut; counterboring produces a square shouldered hole or recess on an already existing hole. Countersinking produces a cone shaped surface around an already existing hole to accept a flat head bolt or screw. In this module, the student will receive instruction in and an opportunity to practice counterboring.

Hand Tapping - In this module, the student will receive instruction on hand tapping on the drill press.

Power Tapping - When a large number of drilled holes are to be tapped, the machinist uses the drill press. In this module, the student will learn the proper steps and how to power tap with the drill press.

Radial Arm Drill Press - The Radial Drilling Machine, sometimes called a radial-arm drill, has been developed primarily for the handling of larger work pieces and drilling tools than is possible on upright or sensitive drilling machines. In this module, the student will learn to operate the radial arm drill press.