K 72: Threaded Assemblies: Essential Design Rules

Understanding and applying threaded connections design rules


Upon completion of the training course, attendees will be able to:

  • Use appropriate practical rules to design threaded connections
  • Design or improve threaded connections according to industry standards (VDi2230 NF E 25-030, etc.).


Knowledge in mechanical design


Technical presentations including theory, exercises, demonstrations, practical examples; punctuated with discussion and questioning from attendees.


Engineers and design office and process planning technicians


  • Standards and characteristics of fasteners
    • Morphology of screws and threaded studs
    • Threads dimensions
    • Mechanical properties of screws and threaded studs
    • Stainless steel fasteners
    • Nuts and threaded parts
    • Designation of fasteners
  • Dynamic properties of fasteners
    • Endurance limit of standardised fasteners
  • Analysis of an assembly
    • Assembly modelling
    • Analytical model and behavior
    • Flexibility of assembly components
    • Assembly behavior
    • Complex assembly, pre-load, external loads and off-center loading
    • Functional pre-load


  • Torque tightening of threaded assemblies
    • Introduction to torque tightening and Torque – Tension relationship
    • Friction coefficient characterization
    • Notions of torque dispersion and tightening domain
    • Process dispersion and tightening strategy
    • Tightening stress
  • Assembly design
    • Topic summary and standardization
    • Simplified procedure for common assembly complete procedure for structural assembly
  • Practical design rules
    • Design of fastened parts
    • Design of assembly function, corrosion and untightening



This course will be conducted by Mr. Elric Leroy, a trainer on bolted assembly and Cetim Cobra Software


Elric Leroy
Mr. Elric Leroy

Trainer on bolted assembly and Cetim Cobra Software – active in the field of Bolted assemblies. Expertise in cold forming assemblies (riveting, clinching & etc…)


    Feasibility studies and industrialization
    • Help to choose assembly technologies and process selection
    • Specific development product/process

    Assemblies design (analytic and FEM dimensioning)
    • Design analysis for different modes of mechanical loads (static, dynamic and cyclic)
    • Design improvement solutions proposal
    • Determination of the causes of the failure of assemblies

    Process analysis
    • Determining the causes of the failure of a process
    • Proposals for corrective solutions, curative and preventive

    Research and development
    • Technical assistance for the research and development on the customer projects
    • Participation in multi-material assemblies studies

    Training experience
    • Training animation on bolted assemblies and Cetim Cobra Software (French and English)


Determination of the causes of the failure of assemblies and proposals for corrective, curative and preventive solutions for energy and mining industrials.

Choice of assembly technology and process selection for multi-material (steel – composite) for automotive industry. And others projects for various companies: Air Liquide, Technip, Bosch Rexroth, PSA, Thales, Liebherr mining, Saft, Valéo, Alstom, GE and etc…


• Production engineer (EIC CHERBOURG – 2005)
• CETIM (2006 – 2019) : Engineer in the Assembly department and project management

Registration Form

To register for the course, please complete this form and email to

Course Name: K 72: Threaded Assemblies: Essential Design Rules

Course Date: Singapore Time 3.00pm – 6.30pm (GMT+8), Europe Time 9.00am -12.30Pm (GMT+2):

12th Oct 2020, Monday Module 1 Standards & characteristics of fasteners
13th Oct 2020, Tuesday Module 2 Dynamic properties of fasteners
14th Oct 2020, Wednesday Module 3 Analysis of an assembly
15th Oct 2020, Thursday Module 4 Torque tightening of threaded assemblies
16th Oct 2020, Friday Module 5 Assembly design & practical design rules

Time: 3.00pm – 6.30pm (GMT+8), 3hours & 30min session each day for 5 days, total 17.5 hours

Closing Date: 29th September 2020, Tuesday

Virtual Learning: A link to join the Virtual Learning will be sent to you upon confirmation and receipt of fees.
Limited seats are available for best results
Registrations will be confirmed in writing and is subject to availability

Course Fee: SGD 2,100.00 OR EUR 1,320.00 OR USD 1,560.00 per person (exclude GST)

Early Bird: Registration must reach us on or before 12th September 2020, Saturday:
SGD 1,890.00 OR EUR 1,190.00 OR USD 1,400.00 per person (exclude GST)

Group Discount: With minimum 3 participants from the same company:
SGD 1,890.00 OR EUR 1,190.00 OR USD 1,400.00 per person (exclude GST)

  • Our Accounts will advise if GST is applicable. Participants shall bear all bank charges.
  • Date Format: MM slash DD slash YYYY

  • Contact Details

Payment Details:

  • Registration form and course fees are to reach MATCOR before the closing date.
  • Registration will only be confirmed upon full payment.
  • Direct internet banking payment to MATCOR Technology & Services Pte Ltd, Bank: Development Bank of Singapore, Bank Code: 7171, Branch Code: 032, Swift Code: DBSSSGSG, Bank Address: 1 Kim Seng Promenade, #02-32, Great World City, Singapore 237994, Account No/IBAN: 032-004152-3.
  • All cheques should be made payable to “MATCOR Technology & Services Pte Ltd” and mailed to 3 Seletar Aerospace Link Singapore 797550, Or
  • Overseas participants may choose to pay in EUR or USD.
  • Participants shall bear all bank charges for payments.

For clarification or inquiries please contact Ms. Pei Shyan NG or Ms. Irene Lim at +65 67788285 or send an email to

Cancellation & Refund:

  • Any cancellation made after closing date – no refund, but delegate substitution is allowed.
  • Any cancellation made before closing date will receive full refund.
  • MATCOR reserves the right to cancel or reschedule the course, only if deemed necessary