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DFTG-2302 – Machine Drafting
Department of
Drafting & Design Engineering Technology
Houston Community College
Syllabus
DFTG-2302
Machine Drafting
Semester Credit Hours (SCH): 3
Continuing Education Units (CEU): 9.6
Weekly class meeting: 4 hrs
Tuesday:5:30 to 9:30 PM
Format: Lecture: 1/3 Lab: 1/3 BlackBoard: 1/3
Any question or concern, please contact your
instructor first. You can also contact department
administration for further assistance.
Professor/Instructor: Ken Nguyen
Phone number: 832-419-1326
Email: kenqn1998@sbcglobal.net
Department Chair: Homied Asgary
Phones: 713-718-5731 – Assistant: 713-718-7264
Email: homied.asgary@hccs.edu Mail Code:
1379
Northwest College
Spring 2012
Semester:
Class (CRN) # 83992
Location (campus/room #):
 Spring Branch, Room: 314
Office:
1050 W Sam Houston Pkwy North,
Suite 200 (next to the Commons)
Houston, Texas 77043
PREREQUISITE: DFTG 1305, DFTG-1333
COURSE DESCRIPTION: Production of detail and assembly drawings of machines, threads, gears, cams, tolerances and limit
dimensioning, surface finishes, and precision drawings.
TEXTBOOK:
“Technical Drawing” by Frederick E. Giesecke, [required]
published by Prentice Hall, Perason Education Inc.
Check with your instructor for the latest Edition
MATERIALS: USB Thump Drive.
COURSE OBJECTIVES: Interpretation of terms used in tolerancing; determine dimensions of two mating parts; draw spur and
bevel gears; and draw set of detail and assembly drawings; define terms used in tolerancing; determine interference and clearances;
specify types of threads forms; interpret thread notes; draw spur, bevel, cam profile; and draw a set of detail and assembly drawings.
1. KNOWLEDGE:
a. understand the requirements of detailed assembly drawings
b. understand the purposes and application of tolerances and tolerance dimensioning
c. understand mechanical components and manufacturing processes
2. SKILLS: a. applying tolerance dimensions according to accepted drafting standards
b. produce detailed drawing sets for complex machine parts
c. calculate tolerances from Appendix data
d. convert a cast part into a welded part and apply welding symbols to the part drawing
e. research and acquire information from vendor catalogs
f. create an assembly drawing and a BOM (Bill of Materials)
g. create detailed cam and gear drawings with tolerance notations.
3. ATTITUDES/BEHAVIORS: a. must follow instructions as presented in the classroom
b. must participate as a team member in a machine design process
c. the student must exhibit patience.
SCANS SKILLS: The Department of Labor has identified skill sets that U.S. employers want most in entry level employees. It is
our commitment to prepare every student with the knowledge and skills needed to succeed in today’s dynamic environment. Toward
this end the following skills will be included in this course:
 Manage money: uses or prepares budgets, makes forecasts, keeps detailed records to track budget performance, and makes
appropriate adjustments.
 Manage space: acquires, stores, allocates and uses materials or space efficiently.
 Work on teams: works cooperatively with others and contributes to group with ideas, suggestions, and effort.


Reading: Locates, understands, and interprets written information in prose and documents including manuals,
graphs, and schedules to perform tasks.
Sociability: demonstrates understanding, friendliness, adaptability, empathy and politeness in new and ongoing
settings.
Students will be presented with a problem in which they will be required to use specifications to develop a work plan. All team
members will be responsible for generating ideas, making suggestions as a part of developing the work plan. The plan must include
specific recommendations for acquisition, systematically storing, and allocating materials. Preparation of the work plan will require
locating and interpreting written information from documents and manuals as well as demonstrating adaptability, understanding and
politeness in accepting changes recommended by others in the class during their presentation.
Evaluation of these skills will be based on the success of each team’s presentation of their work plan to the class.
GENERAL COURSE EVALUATION PROCEDURE: The student will be evaluated and receive a final grade based upon the
following criteria:


Laboratory work consisting of assigned technical drawing problems.
A minimum of six (6) tests: (4 quizzes, a mid-term and a final examination)
Revised 6/30/2016
DFTG-2302 – Machine Drafting
- Individual instructors may schedule more test if desired
 Class and laboratory attendance, active participation in class, professional attitude and growth in terms of
technical skills development and teamwork within the laboratory environment shall be taken into consideration.
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COURSE EVALUATION PROCEDURE: The student will be evaluated and receive a final grade based upon the following
criteria:
 Laboratory work consisting of assigned technical drawing problems.
 A minimum of 2 tests: (a mid-term and a final examination): NOTE: - Individual instructors may schedule more tests if
desired
 Class and laboratory attendance, active participation in class, professional attitude and growth in terms of
technical skill development and teamwork within the laboratory environment shall be taken into consideration.
GRADING PROCEDURE:
A = 90 –100
B = 80 – 89
C = 70 – 79
D = 60 – 69
F = below 59
The drawing portion of the above evaluation criteria shall be based on the layout, dimensional accuracy, neatness, and timely
completion.
LATE ASSIGNMENT POLICY: Students are encouraged to turn assignments in on time if at all possible. This allows the
instructor to grade the work, return it to the student and the student use the feedback as a learning tool.
MAKE-UP TEST/PROJECT POLICY: The student must request a make-up test and it should be scheduled at the earliest possible
date following the quiz (or mid-term) missed. NO make-up test is given for the final examination.
EXTRA CREDIT: Extra credit work is offered only to assist students that that have a grade range of “D” or “F” at the mid-term
break. This work cannot be substituted for regular assignments and can only raise the final grade to a maximum of a “C”.
PROGRAM ACCESSIBILITY (ADA): The Houston Community College, Drafting and Design Technology Program are
committed to making all aspects of the program accessible to individuals with disabilities. Students with disabilities, as defined by
the American with Disabilities Act (ADA), are required to obtain certification of their impairment through the Northeast College
ADA Certification Office, located in the Northline Mall Campus. For information call Barbara Morris at, 713-718-8148.
CLASS ATTENDANCE: You are expected to attend all lecture classes and labs. You are also responsible for all materials
covered in either lecture or lab. In the case of your absence, you must contact the instructor to obtain make-up assignments or
arrange make-up testing, either of which can be distributed at the instructor’s discretion. Class attendance is checked daily.
The instructor has the authority to drop you from the class for excessive absence. You may be dropped from the class and get an
F grade if you are absent more than 12.5% of the instruction hours (lecture and lab). For example: A 12.5% of 96-hour course,
meeting twice per week for 3 hours per class meeting equals 12 hours. If you are absent more than 4 class meetings, you may
drop.
WITHDRAWAL - It is your responsibility to withdraw from the class if you can not complete it. Failure to do so will result in an F
grade. Check calendar for the official last day to withdraw.
Note: Although it is your responsibility to officially withdraw from a class, please discuss with your instructor first.
Consistent class attendance is very important. However, if you have to miss a class for a valid reason, you instructor may
be able to help you catch up with the class. Please let your instructor know as soon as possible if you have to miss a class.
Valid reason is decided on a case by case basis.
Departments and programs governed by accreditation or certification standards may have different attendance policies.
RELIGIOUS HOLIDAYS: If you observe a religious holiday and miss class, you must notify your instructor in writing two weeks
in advance to arrange to take a test or make up an assignment. A religious holiday is "a holy day observed by a religion whose place
of worship is exempt from property taxation under Section 11.20, Tax Code."
SCHOLASTIC DISHONESTY: Students are responsible for conducting themselves with honor and integrity in fulfilling course
requirements. College System Officials may initiate penalties and/or disciplinary proceedings against a student accused of scholastic
dishonesty.
 "Scholastic dishonesty" includes, but is not limited to, cheating on a test, plagiarism, and collusion.
 "Cheating" on a test includes:
 Copying from another student's test paper;
 Using materials during a test that are not authorized by the person giving the test;
 Collaborating with another student during a test without authority;
 Knowingly using, buying, selling, stealing, transporting, or soliciting in whole or part the contents of an un-administered test;
 Bribing another person to obtain a test that is to be administered.
 "Plagiarism" means the misuse of another's work and the deliberate incorporation of that work into work you offer for credit.
 "Collusion" means the unauthorized collaboration with another person in preparing work offered for credit.
Determination of scholastic dishonesty will be at the discretion of the instructor.
Reference the following web link for additional information: http://www.hccs.com
Revised 6/30/2016
DFTG-2302 – Machine Drafting
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“Notice: Students who repeat a course three or more times may soon face significant tuition/fee increases at HCC and other Texas
public colleges and universities. If you are considering course withdrawal because you are not earning passing grades, confer with
your instructor/counselor as early as possible about your study habits, reading and writing homework, test-taking skills, attendance,
course participation, and opportunities for tutoring or other assistance that might be available.”
Course Content
Machine Drafting
DFTG 2302
Unit 1: Design & Working Drawings.
At the end of this unit the student should be able to:
1. Understand the various steps in the design and
manufacture of a product.
2. Identify the different types of engineering
drawings used in each phase of the design
and manufacture process.
3. Correctly fill out a standard company title
block for a drawing.
4. Identify and use the various standards and
reference books found in a typical drafting
room.
Unit 2: Dimensioning
At the end of this unit the student should be able to:
1. Draw the necessary views of a part for
manufacture.
2. Apply dimensions according to accepted
drafting standards.
Unit 3: Tolerancing
At the end of this unit the student should be able to:
1. Understanding tolerancing as applied for part
manufacture and assembly.
2. Define the different types of tolerances.
3. Apply tolerances to a machine drawing.
Unit 4: Threads & Fasteners
At the end of this unit the student should be able to:
1. Define terms relating to screw threads.
2. Apply thread notations to drawings according to
ANSI standards.
Unit 5: Assembly Drawings
At the end of this unit the student should be able to:
1. Create an assembly drawing of a machine part.
2. Create a bill of material list.
Unit 6: Gears & Cams
At the end of this unit the student should be able to:
1. Define the different types of gears used.
2. Understand the basic working principle of
gears.
3. Produce a gear drawing.
Unit 7: Manufacturing Processes
At the end of this unit the student should be able to:
1. Understand the different types of manufacturing
process.
2. Define terms relating to manufacturing
processes.
3. Apply welding symbols to a drawing.
4. Understand material specifications and notation
Unit 8: Vendor Data Research
At the end of this unit the student should be able to:
1. Identify the various composite vendor catalogs
for engineering construction materials.
2. Look up information in the catalogs.
Unit 9: Drafting Mathematics
At the end of this unit the student should be able to:
1. Perform basic mathematic calculations typically
used in machine drafting.
Revised 6/30/2016
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DFTG-2302 – Machine Drafting
COURSE SCHEDULE AND ASSIGNMENTS
(16-Week Semester)
WEEK
1
MATERIAL COVERED
Day 1 Lecture: Introduction
Course Introduction. Discussion of course syllabus, materials
required for course, sources of supplies, class attendance, and
grading system.
Purchase textbook.
13th edition - Read Chapter 12: Working drawings, page 418
Lecture: Design & Working Drawings
Read Chapter Summary
Read Key Words
Answer review questions
1.
2.
3.
4.
5.
Design process
Sheet sizes
Design Layout
Production Drawings
Title Block Layout
Day 1 Lecture: - Tolerancing
2
ASSIGNMENT
1.
2.
3.
Purpose
Definitions used
Fits between mating parts
Lab : Draw details of Belt Tightener.
13th Read Chapter 10: Tolerancing, page 334-352
12th Read Chapter 12
Read Chapter Summary
Read Key Words
Answer review questions
Lab : Work on details of Belt Tightener.
Day 1 Lecture – Geometric Tolerancing
1.
13th Read Chapter 10: Geometric Tolerancing, page 353-366
12th Read Chapter 12
Geometric Tolerancing Filmstrip
Read Chapter Summary
Read Key Words
Answer review questions
Geometric tolerances to belt tightener 7/8 dia hole on top half of
frame must be parallel to the 5/8 dia. on the bottom to within .008
MMC. Place the correct datum identification and feature control
frame on the detail drawing to indicate this condition.
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Lab : Work on details of Belt Tightener.
Day 1 Lecture - Threads & Fasteners
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1.
2.
3.
Definitions of screw threads
Thread Notation
How to drawing machine threads
13th Read Chapter 11: Threads & Fasteners, page 376
12th Read Chapter 13
Read Chapter Summary
Read Key Words
Answer review questions
Work on handout sheet on threads.
Lab : Work on details of Belt Tightener.
Day 1 Lecture – Assembly Drawings
5
1.
2.
3.
Types of Assembly Drawings
How to Drawing Assembly Drawings
How to create a Bill of Materials
Day 1 Lecture: Manufacturing Design and Process
6
1.
2.
3.
4.
Create Belt Tightener Assembly Drawing
Dimensioning Production Drawings
Production Process
Engineer Materials and Properties
Measuring Devices
13th Read Chapter 8: Manufacturing Processes, page 262
Read Chapter Summary
Read Key Words
Answer review questions
Lab : Work on details of Belt Tightener.
Revised 6/30/2016
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DFTG-2302 – Machine Drafting
Day 1 Lecture – Reproduction & Control of Drawings.
Current trends in Mechanical Technology.
1.
The use of computers in drafting.
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13th Read Chapter 13: Drawing Management, page 494
Read Chapter Summary
Read Key Words
Answer review questions
Review for Midterm
Lab : Work on Belt Tightener Assembly Drawing.
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Day 1: Midterm
Turn in Belt Tightener details and Assembly Drawings.
Lecture:
1.
2.
3.
13th Read Chapter 17: Gears and Cams, page 594
Gears & Cams
Types of Gears
Gear Terminology
How to create a Gear Drawing
Read Chapter Summary
Read Key Words
Answer review questions
Lab : Create working drawing of a spur gear from gear data sheet.
Day 1 Lecture: Cams:
9
1.
Cam Profile Drawing
Day 1 Lecture: Welding,
Welding film strip
10
1.
2.
3.
Create CAM profile drawing
Types of processes
Welding symbols
Welding Application
13th Read Chapter 22: Welding Representation, page 716
Read Chapter Summary
Read Key Words
Answer review questions
Work handout sheets in class
Lab : Create welding drawing.
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12
Day 1 Lecture: Application of Weld Symbols
Work on weld problem
Day 1 Lecture – Drafting Mathematics
Work on handout assignment
1.
2.
Math constants
Use of Trigonometry to solve machine drafting
problems.
Day 1 Lecture – Use of Auxiliary views
13
1.
2.
Review use of auxiliary views
How to calculate the weight of a part
Day 1 Lecture – Vendor Data Research
14
15
16
1.
2.
3.
Discuss the grade lab assignment
Locator handout problem
Work on locator problem
Use internet to find technical Product Data
Vendor Product Catalogs
Engineering Specifications Catalogs
Library use
Open assignment week:
This week to be used as a makeup for spring break during spring
semester and holidays during fall semester.
All outstanding assignments should be completed this week.
Review for final examination
All outstanding work must be turned in this week
Take Final Exam
(2 hrs maximum)
Final Exam
Revised 6/30/2016
DFTG-2302 – Machine Drafting
Houston Community College System
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Drafting & Design Technology
DFTG-2302 –Machine Drafting
ADDITIONAL INFO & RULES
1. TEXTBOOK:
• Textbook is available at Town & Country Campus Bookstore (713) 468-5300.
• Materials on specific topics prepared by the instructor might be handed out, if needed. It is student’s
responsibility for making copies of hand-outs from classmates should he/she missed a class meeting.
2. MATERIALS REQUIRED
• Drafting instruments (See list)
3. CLASS RULES
a. All cellulars and pagers must be turned off during the class meeting.
b. Sign in on the Blue Form for every class meeting (not available until the second week)
c. Email or call your instructor at least 24 hours if you can not make the class.
d. SCHOLASTIC DISHONESTY:
Students are responsible for conducting themselves with honor and integrity in fulfilling course
requirements. College System Officials may initiate penalties and/or disciplinary proceedings against a
student accused of scholastic dishonesty.
"Scholastic dishonesty" includes, but is not limited to, cheating on a test, plagiarism, and collusion.
Please reference the following web link for additional information: http://northwest.hccs.edu
4.
COURSE EVALUATION PROCEDURES:
a. Assignments: Unless otherwise specified, each assignment must be completed and turned in
within the following week for an up-to-full credit.
b. Quizzes: In-class exams will be given during the semester.
c. Final Project & Examination:
Students will be given a final project and a final exam.
5.
STUDENT EVALUATION:
Attendance (Lecture session)
Drawing assignments
Midterm Exam
Final Exam
Main Project
Total:
20%
20%
20%
20%
20%
100%
6. GRADE PROCEDURE:
A = 90-100
C = 70-79
F = 59 and below.
B = 80-89
D = 60-69
I = Incomplete (*)
(*) Fail to submit Final project or not show up at the Final Exam
7.
WITHDRAWAL
It is student’s responsibility to withdraw from the class. Check calendar for the official last day to withdraw.
Revised 6/30/2016