Geometric Dimensioning & Tolerancing to ASME Y14.5 – Level 1

Organisation profile

IMR is Ireland's leading independent research and technology organization, RTO. All Irish Manufacturing Research’s projects focus on translational innovation projects, in collaboration with industry, to demystify, de-risk and deliver emerging concepts, processes and technologies.

Training aim

Geometric Dimensioning & Tolerancing to ASME Y14.5 – Level 1 is a three-day course which can be delivered either in a classroom environment or online.

The course uses some examples of drawings or components from the client, where available, to help to illustrate the course material and as the basis of some worked examples and exercises. The course covers the fundamental concepts of GD&T, its application and interpretation.

The course is suitable for anyone who is familiar with the conventions of engineering drawing and limit (or ±) tolerances on dimensions, and is relevant to anyone who has to produce or interpret mechanical engineering specifications. The course is based on the American ASME Y14.5 standard, and is applicable to users of the 1994, 2009 and 2018 revisions (a version is also available based on the British BS 8888 standard and the ISO standards which it references).

Delegates are provided with comprehensive course notes, and a workbook with questions and exercises to accompany the training material.

Learning objectives

Geometric Dimensioning & Tolerancing to ASME Y14.5 – Level 1 is a three-day course which can be delivered either in a classroom environment or online. The course uses some examples of drawings or components from the client, where available, to help to illustrate the course material and as the basis of some worked examples and exercises.

Course outline

Section 1: Description of Module 1

Standards in context

• ASME Y14.5, British Standards and the ISO system

• What is Geometric Dimensioning & Tolerancing?

• Benefits of GD&T

Section 2: Module 2

Features and Features-of-Size

• Mating envelopes and geometric counterparts

• Rule #1 (the Taylor Principle)

Datums and Datum Systems

• datums and datum features

• datum simulators

• selection of datums

• identifying datum features on the specification

• datum target

Section 3: Module 3

Six degrees of freedom

• controlling the degrees of freedom for the tolerance zone

• degrees of freedom and the Datum Reference Frame

• Feature Control Frames

• tolerance symbols

• Feature Control Frame modifiers

• positioning the Feature Control Frame on the drawing

Section 4: Module 4

Basic dimensions

• Tolerance characteristics (including what they will and won’t control)

• Location tolerances

• Orientation tolerances

• Form tolerances

• Profile tolerances

• Run-out tolerances

Section 5: Module 5

The GD&T roadmap – how to choose which tolerance to use

• Inner and Outer Boundaries

Section 6: Module 6

Applying tolerances at Maximum Material Condition

• Virtual Condition boundaries and Virtual Condition size

• Bonus Tolerance

Section 7: Module 7

Application of tolerances in special cases

• Other relevant ANSI and ASME standards technology.

Trainer's profile

Iain Macleod provides training and consultancy services to organisations in all areas of industry, including the Aerospace, Defence, Nuclear, Automotive, Medical, and Oil & Gas sectors, as well as organisations making scientific instruments and consumer products.

Iain chairs ISO Technical Committee TC 213, responsible for international standards for Geometrical Tolerancing and Geometrical Product Specification, and BSI technical committee TDW/4/8 , responsible for the BS 8888 standard for technical product specification. He is also a Contributing Member of ASME technical committee Y14, subcommittee 5, responsible for the ASME Y14.5 standard.

His company is an Approved Supplier to BAE SYSTEMS and an Accredited Training Provider for the National Physical Laboratory training courses in Geometrical Tolerancing and Dimensional Measurement.

His clients include Formula 1 racing teams, many of the major companies in the aerospace and defence sectors, and numerous SMEs across a wide range of industries.

Specialties: Iain provide training for engineers, designers and technicians in:-

- Geometrical Tolerancing / Geometric Dimensioning & Tolerancing (GD&T)

- Geometrical Product Specification (ISO GPS)

- BS 8888

- ASME Y14.5

- Tolerance Stack Calculations

- Stress Analysis

- Surface Texture specification

- Engineering Drawing

- Audits, assessment, information and advice.

Course duration

4 days virtual classroom or 3 days face to face

Assessment & certification

CPD and the course can be certified by the Institution of Engineering Designers, and can also be delivered, through the National Physical Laboratory training framework, with each delegate receiving a certificate from NPL on completion. To maximize the effectiveness of the training, an upper limit to the class size of 10 delegates is recommended for the geometrical tolerancing courses.