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About The Instructor

about 1 year ago

Mr. Shan Packer

Instructor: Mr. Shan Packer (

Mr. Packer is a Pennsylvania certified Journeyperson Machinist and has 25 years of industry experience.  Mr. Packer holds 6 certifications from the National Institute of Metalworking Skills and has a Vocational 1 Education credential from Penn State University.

Central Mountain's Precision Machining program is designed to prepare students for a challenging and rewarding career in a field that is in high demand.  Nationwide the machine tool industry faces a shortage of trained workers. It is estimated that there is a nationwide need for 80,000 skilled machinists.

According to a 2010 Pennsylvania labor study machining is listed as one of the top 2 skills demanded for Pennsylvania over the next decade.

The Precision Machining program offers basic instruction in the use of precision tools and instruments.  This program provides first-hand machinist training in the areas of turning, shaping, and grinding materials.  Recommended preparation includes, but does not require basic mathematics, mechanical drawing, computer literacy or industrial arts.

Advanced standing through several Pennsylvania colleges will be granted to students successfully completing the 3 year program, with up to 14 credits toward a degree in Precision Machining Technology offered at no cost to the student.


  • Inspection

  • Machine Operation and Setup

  • Blueprint Reading

  • Safety Procedures

  • Layout and Bench Work

  • Computer Numerical Control

  • CNC operations

  • Mill Work

  • Lathe Work

  • Grinding Work

  • Shop Safety

Machinists and die and mold makers who master the computers which drive production are the elites of our manufacturing force.  The best can earn as much as $100,000 a year. Even a 26-year old mid-ranked specialist without a college degree but with four or five year’s on-the-job and technical program training can make $41,000.  That's $10,000 more than the average 26-year old with a bachelor's degree.

The Precision Machining program offered by Central Mountain is validated by the Pennsylvania Department of education and the National Institute for Metalworking Skill, Inc. (NIMS). The National Institute for Metalworking Skill, Inc. is a nonprofit, national educational foundation, formed to support the development of a skilled workforce for the metalworking industry. NIMS primary activities include the development and maintenance of skills standards, certify training programs that meet NIMS quality requirements, and assist schools and companies in the implementation of skills standards.

This accreditation allows students the opportunity to achieve nine different level one machinist’s certification through this 3 year program.  Students undergo a skills test and an online test to attain level one certified. Central Mountain works in conjunction with a consortium of precision machining companies to develop a curriculum that meets industry standards and satisfies the growing needs of the community.

Students will have the opportunity to be a part of Skills USA, a national organization serving more than 240,000 high school students and professional members enrolled in training programs for technical, skilled, and service occupations.  Skills offers the chance to compete at local, district, state, national, and world events.

Personal development, work attitudes, and leadership are taught using the National Organization Skills USA curriculum.

Program Offerings

about 1 year ago

Precision Machining 1, 2:

An instructional program that prepares individuals to apply technical knowledge and skills in all aspects of shaping metal parts. Instruction involves making computations relating to work dimensions, tooling, and feeds and speeds of machining. Emphasis is places upon bench work and the operation of lathes, power saws, shapers, milling machines, grinders, drills and computer operated equipment (CNC and CIM). Instruction also includes the use of precision measuring instruments such as layout tools, micrometers and gauges; methods of machining and heat treatment of various metals; blueprint reading: and the layout of machine parts. Instruction prepares students to operate all types of hand and computer controlled machines.

Precision Machining - Challenge

Precision Machining - Documents and Handouts

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Precision Machining - Tech Challenge

about 1 year ago

Precision Machining - Tech Challenge

IMPORTANT:  Completing this worksheet is worth up to 80 points out of your total 300 point Plastics Experience RC 500 score. The other 20 points for the tech challenge will be assigned for aerodynamic design.

>> DO NOT forget to hand this in when you arrive. There will be a box in the CC Commons. <<

1)   Thermoforming is a polymer processing technique used to shape heated plastic sheet into a particular form.  You can find thermoformed plastic in many everyday appliances and consumer goods.

Research and list five thermoformed household or commonly-used products

2)  There are a number of plastic processing techniques commonly used in industry, including extrusion, injection molding, blow molding, and of course, thermoforming.  Each technique calls for plastics with different chemical and mechanical properties.  You will be given several sheets of PET (polyethylene terephthalate) and HIPS (high impact polystyrene), both of which are commonly-used polymers in thermoforming.

Research PET and HIPS.  List the following mechanical and chemical properties for each polymer:

polymer density (g/cc)

tensile strength (MPa)

monomer / repeat unit drawing

monomer molecular weight (g/mol)

glass transition temperature (°C)


Circle one answer for each question

3a)          When were SPI ratings created to help sort plastics for recycling?

                - 1976                - 1988                - 1982                - 1979

3b)         PET’s SPI rating is__, while PS’s is__.

                - 1, 6                - 1, 7                - 2, 6                - 2, 7


4)  Calculate the density of the two materials provided to you, PET and HIPS.

To do this, cut a 1”x1” section of the sheet provided and measure its thickness.  Then, measure its weight.  Calculate the material density in g/cm3.  Please list thickness and weight measurements as well as the calculated density for both materials.


5)  Calculate the acceleration to weight ratio in (mph2)/lb of your car, with load.

Use the following values:
The cars went 0-.114mph in 5 sec
Weight is 1.06 lb


6)  Now calculate the acceleration to weight ratio of a 2012 Lexus LFA.  Use the following web site for 2012 LFA tech spec values:

Select English then North America
Select Product info then specifications (the velocity is listed under acceleration, divide this by the hours it takes to reach 60mph)
Select Major dimensions/Vehicle Weights use the lower pound value for the curb mass


7)  Measure and record the thickness of your car body in six different areas – hood, roof, right side, left side, front bumper, rear bumper.

Which section of your car is the thickest?

Which section is the thinnest?

What is the average thickness of your car?

How does this compare to the original thickness of the sheet?


8)  The Draw Ratio is a measure of the degree of stretching that occurs during thermoforming. It is expressed as the cross-sectional area of the undrawn material to that of the drawn final product.

Take a sheet of material and draw 1”x1” sections on it with a sharpie marker.

After these sections are squared out, thermoform the sheet over your car mold.

Calculate and record the cross-sectional area and draw ratio in the same six sections of your car from question 5.

Which area of your car had the largest draw ratio?

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