Machining & CNC Skills Development Programme

GD & T (Geometric Dimensioning and Tolerancing)

1 day course aimed at CNC Machinists, manual machinists, toolmakers and quality inspectors in manufacturing environments.

Duration 1 day
Delivery TDR or at employer site
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GT & T (Geometric Dimensioning and Tolerancing)

Course Overview:
This one-day GD&T course introduces the principles of Geometric Dimensioning and Tolerancing and their application within a machining and manufacturing environment. You’ll learn how to interpret GD&T symbols, understand datum reference frames and feature control frames, and apply material condition modifiers such as MMC, LMC and RFS. The course also covers practical print reading, machining applications and inspection methods using manual measurement equipment and CMMs.

Course Schedule
Understanding GD&T in a Machining Environment
• Introduction to GD&T and ASME Y14.5 standards
• Understanding the 14 core geometric symbols
• Applying the 3-2-1 datum principle and Datum Reference Frames
• Reading and interpreting Feature Control Frames
• Understanding tolerance zones and datum priorities
• Applying MMC, LMC and RFS
• Calculating bonus tolerance
• GD&T print reading for CNC milling and turning
• Position, perpendicularity and runout applications
• CMM and manual inspection verification
• Practical print-reading exercises and final assessment

Duration: 1 day

Certification

What you'll achieve

TDR Certificate of competence will be awarded upon completion of the training course.

Machining & CNC

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Help & advice

Apprenticeships, explained

The questions we get asked most, answered plainly.

The first step is completing an online application form through the TDR Training website.

If eligible, the candidate will be invited to TDR to complete:

  • A 40-minute English and maths assessment.
  • An interview with one of TDR’s Training Officers.

Completing an assessment and interview does not automatically guarantee a place on the TDR recruitment database.

Candidates are assessed on:

  • Punctuality.
  • Presentation.
  • Preparation.
  • Communication skills.
  • Interview responses.
  • Motivation.
  • Overall attitude and professionalism.

Making a positive impression is essential, as successful candidates will be shortlisted for employer opportunities.

Once a candidate has been added to the TDR recruitment database, our Employer Engagement Team will actively work to identify suitable employers and apprenticeship opportunities.

When a suitable opportunity becomes available, we will contact the candidate and arrange an interview where appropriate.

Although we work hard to support candidates, we cannot guarantee that every candidate will secure an apprenticeship. We therefore recommend candidates continue applying to other colleges and training providers to maximise their opportunities.

We use several methods to communicate with candidates about apprenticeship opportunities.

Text messaging is our most common method of contact, but we also use telephone calls and email.

Candidates must regularly check their messages and respond promptly. Failure to answer calls or reply to messages could mean missing out on important apprenticeship opportunities.

Yes. Candidates should keep TDR updated with any changes that could improve their chances of securing an apprenticeship.

Examples include:

  • Passing a driving test.
  • Achieving additional GCSEs or qualifications.
  • Gaining work experience.
  • Becoming more flexible about apprenticeship choices.

Regular communication ensures we always have the most up-to-date information when matching candidates with employers.

During the assessment and interview process, we spend time understanding what each candidate wants to achieve and what type of engineering career interests them.

We often challenge candidates to explain why they want to follow a particular route, helping ensure they have made an informed career choice.

Candidate information, interests and career aspirations are recorded and used when matching individuals with suitable employer vacancies.

TDR will not put a candidate forward for a position that does not match their interests, as finding the right fit is important for long-term success.

A candidate who has completed, or is currently completing, a relevant Level 3 engineering qualification should still aim to secure a Level 3 apprenticeship.

The technical qualification is only one part of the full apprenticeship programme. An apprenticeship develops practical skills, technical knowledge and workplace behaviours while the apprentice is employed and gaining real industry experience.

If the Level 3 qualification already achieved is relevant to the apprenticeship standard, the overall duration of the programme may be reduced through recognition of prior learning.

TDR Training is different from a traditional college.

Every learner attending TDR for practical training, a BTEC or an HNC is employed by an engineering employer. They are therefore expected to behave in the same way as they would in the workplace.

We expect high standards of:

  • Attendance.
  • Punctuality.
  • Professional behaviour.
  • Respect.
  • Health and safety awareness.
  • Commitment to learning.

Every learner represents their employer while attending TDR and is expected to act as an ambassador for their company.

This creates a professional, safe and industry-focused learning environment.

No. Apprenticeships at TDR do not only start in September.

Because TDR has its own dedicated engineering training school, we can support apprentice starts throughout the year. This provides greater flexibility for both employers and candidates.

Unlike a traditional college, TDR continues to support learners throughout the year, including school half-term periods and summer breaks.

No. As an apprentice, you do not pay for your training.

The cost of apprenticeship training is funded through government funding and employer contributions.

Employers are responsible for paying their apprentice a wage. Depending on the size of the business and, in some circumstances, the age of the apprentice, a contribution towards training costs may be required.

From 1 April 2026, the apprentice minimum wage is £8.00 per hour for apprentices under 19, or aged 19 or over in their first year. After completing their first year, apprentices aged 19 or over must receive at least the minimum wage for their age: £10.85 for ages 19 and 20, and £12.71 for ages 21 and over.

You are paid for working time and required apprenticeship training. Employers can pay more than the minimum. Check the latest government minimum wage rates.

Most apprentices work at least 30 hours per week, with many working a full-time week of 37 to 40 hours.

This includes:

  • Workplace learning with the employer.
  • Practical training at TDR.
  • Technical learning.
  • Progress reviews with an assessor.

An apprenticeship is a real job, and apprentices are expected to demonstrate the same commitment and professionalism as any employee.

An apprenticeship allows you to learn practical skills while earning a wage from day one.

Benefits include:

  • Real workplace experience.
  • Industry-recognised qualifications.
  • Practical engineering skills.
  • Learning from experienced engineers.
  • Improved career opportunities.

Apprenticeships are focused on demonstrating competence in the workplace rather than relying only on traditional exams.

Yes. An apprenticeship is the beginning of your engineering career.

Many TDR apprentices progress into higher-level qualifications, specialist roles, supervisory positions and leadership opportunities.

Progression routes may include:

  • Level 4 apprenticeships.
  • HNC qualifications.
  • Specialist engineering roles.
  • Further professional development.

TDR supports lifelong learning and continued career development.

The length of an apprenticeship depends on the level, subject area and apprenticeship standard.

Most apprenticeships take between one and five years to complete.

Throughout the apprenticeship, you are employed by your employer, receive a wage and continue developing your technical skills, knowledge and behaviours through workplace learning and training at TDR.

TDR currently offers the following Level 4 apprenticeships:

  • Lead Maintenance Technician.
  • Manufacturing Technician.
  • Automation and Controls Engineering Technician.
  • Quality Practitioner.

These apprenticeships are generally suited to more experienced candidates and are often a progression route for those who have completed a Level 3 apprenticeship.

Candidates with only a Level 3 qualification from school or college may not always have the workplace experience required for these higher-level programmes.

That is absolutely fine.

If an employer has already identified the individual they want to recruit, they simply need to contact TDR Training.

We will guide both the employer and candidate through the necessary processes, including eligibility checks, assessments and enrolment, allowing the apprentice to begin their training programme.

Alongside apprenticeships, TDR delivers a wide range of commercial engineering and professional training courses for individuals and employers.

Courses include:

  • Electrical engineering.
  • Mechanical engineering.
  • Welding and fabrication.
  • Machining.
  • CAD.
  • Hydraulics and pneumatics.
  • Health and safety.

We also deliver higher-level qualifications, including HNC programmes.

Employers are responsible for employing the apprentice and paying their wage.

The cost of apprenticeship training is supported through government funding. Depending on the size of the organisation and the circumstances of the apprentice, employers may be required to contribute towards training costs.

For full details on funding options and employer responsibilities, please contact TDR Training.

TDR provides a specialist engineering training environment designed around the needs of employers and industry.

Unlike a traditional college, TDR has its own engineering training school where apprentices develop practical skills alongside their workplace learning.

Employers benefit from:

  • Industry-focused training.
  • Flexible apprenticeship start dates.
  • Direct communication with TDR staff.
  • Practical skills development.
  • Support throughout the apprenticeship journey.

Our aim is to develop skilled, professional engineers who are ready to contribute positively to their employer.

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