| Training utilising Video Conferencing
The in-house training course on Bolting Technology for Engineers and Designers can now be delivered using video conferencing. A brochure is available providing the content for
this course and can be downloaded by clicking on the link below.
Training Course on Bolting Technology for Engineers and Designers utilising video conferencing
This training can be provided to individuals within organisations independent of their geographic location, so long they have a broadband Internet connection. This is the same training that has been delivered physically world-wide and receives very positive feedback.
The rise of online teaching has transformed the way we can learn and work together. With the ability to reach larger audiences, there are a number of advantages offered by video conferencing:
The training will be delivered by Dr. Bill Eccles.
- Bespoke to a specific company.
- Provide training to a large group of people simultaneously. (Up to 100 people, more possible upon request)
- Complete the training anywhere there is an Internet connection and on any device.
- Provide a short training course providing state of the art information on a specific topic (such as fastener loosening or thread stripping etc.) to assist Engineers in solving a service or production problem.
- Flexibility. One of the advantages of this type of training is that it provides more flexibility when teams are dispersed. A user can still easily participate in training delivered via video conferencing on a laptop, smartphone, iPad or other mobile devices.
- Effective communication. In many situations, learning face to face is still preferable. Training via video conferencing allows participants to ask questions in real time and also pick-up on non-verbal communication which can assist the learning process.
- Enhanced staff training. By eliminating time and space barriers, training can be facilitated in what would otherwise be lost time and can facilitate on-going education.
- Higher productivity and efficiency. By eliminating time and space barriers, training using video conferencing can lower costs on business travels and staff training.
If you would like us to provide a
quote for a training course at your premises or via video conferencing, why not contact
The course content for the course 'Bolting Technology for Engineers and Designers' includes:
Introduction to Threaded Fasteners
Preload Variation in Threaded Fasteners
- Know the meaning of thread terminology.
- Learn when it is appropriate to use
a fine rather than a coarse thread.
- Be aware of the principal bolt and nut
strength property classes and how they should be specified.
- How to match the nut strength to that
of the bolt so that thread stripping problems are prevented.
- Find out why bolt tensile fracture is
preferable to the threads stripping.
- Learn what the proof load is and why
it is used.
- Be able to identify the meaning of the
markings on bolt heads and nuts.
- Learn about the thread stress area and
how it is derived and used.
- Be able to calculate the tensile strength
of a threaded fastener.
- Understand how a pre-tensioned bolted
joint sustains an applied load.
Galling of Threaded Fasteners
- Learn why there can be such a significant
variation in the preload (tension in the bolt) and the consequences
- How the torque is distributed between
the threads and the nut face when free spinning and torque
prevailing fasteners are used.
- Why preload is so crucial in a bolted
- How preload variation can be accounted
for at the design stage.
- The effect of the tightening method
on the preload variation sustained by a fastener.
- What is galling and what types of materials
tend to be affected?
- Examples of fastener threads that have
galled, sectioned and x-ray photos.
- Four ways that galling can be eliminated.
Methods of Tightening Threaded Fasteners
Have an understanding of the principles
behind each of the following tightening methods:
Failure Modes of Threaded Fasteners
- Torque controlled tightening.
- Torque-angle controlled tightening.
- Yield controlled tightening.
- Bolt stretch method.
- Heat tightening.
- The use of load indicating methods.
- The use of ultrasonics to determine
Self-Loosening of Threaded Fasteners
- Learn the differences between a manufacturing
and design quality defect.
- Be able to identify whether a failure
is due to a fault in the design specification or is manufacturing
- Learn the 5 main design related failure
modes of threaded fasteners and bolted joints.
- Have knowledge of the critical importance
of a fastener's clamp force in ensuring a joint's structural
- Why the joint design normally prevents
- Learn about fatigue and where failures
normally occur on a threaded fastener.
- Why bearing stress can be crucial in
ensuring a reliable joint.
- Learn about the nature of internal and
external thread stripping failures.
Have an overview of the research completed
over the last 50 years into establishing the cause of self-loosening
of threaded fasteners.
Appreciate the forces that are acting on the threads that
tend to self loosen a fastener.
- Why fine threads
can resist loosening better than coarse threads. The inclined
- Learn about the work completed by Goodier
and Sweeney into loosening due to variable axial loading.
- The work completed by ESNA and the theory
of shock induced loosening and resonance within fasteners.
- The MIL-STD 1312-7 vibration test for
- Junker’s theory on self-loosening
of fasteners and why fasteners self-loosen.
- The Junkers/transverse vibration test
- The influence that vibration amplitude
has on the fastener self-loosening rate.
- Preload decay curves and the effectiveness
of various fastener types in resisting vibrational loosening.
- The findings of Haviland and Kerley
and how fasteners can come loose as a result of bending,
shock or impact and differential thermal expansion.
- Conclusions from the research and how
loosening can be prevented.
- What is meant by a tightening torque?
- Units used to measure torque.
- What are the consequences of not applying
sufficient torque to a bolt.
- How torque is absorbed by a nut/bolt
- The torque-tension graph.
- The relationship between the tightening
torque and the resulting bolt preload (tension).
- The factors which affect the torque-tension
- The nut factor method of determining
the correct tightening torque.
- Example calculation of how to determine
the correct tightening torque.
- Scatter in the bolt preload resulting
from friction variations.
- Determining the bolt preload (tension)
resulting from a tightening torque.
- Prevailing torque fasteners (such as
those containing a nylon insert) and how they affect the
torque distribution and the correct torque to use.
Load Sensing Fasteners
- The use of strain gauged bolts.
- The use of load cells.
- The use of Rotabolts™.
- The use of Smartbolts™.
- The use of direct tension indicators
(load indicating washers).
- Squirter™ direct tension indicators.
- Tension control bolts.
Hydraulic Tensioning of Threaded Fasteners
- The principles behind hydraulic tensioning.
- The number of tensioners that are used
to tighten a joint – 100%, 50%, 33% and 25% tensioning
- The effect of elastic recovery on the
tension induced into a bolt.
- The use of hydraulic nuts and the sequence
used to tighten them.
- The use of oil filled nuts.
- The use of rubber filled nuts.
- The problems of tightening multi-bolt
- Elastic interaction or bolt cross-talk.
- The use of a tightening sequence.
- The single pass tightening sequence.
- Tightening sequences for non-circular
- Tests completed to verify tightening
- The two pass tightening sequence.
- The use of multiple tightening tools.
- Bolt cross talk and hydraulic tensioning.
- Methods that can be used to check the
- The solder plug method.
- The use of pressure sensitive films.
- Establishing a tightening procedure.
- Examples of tightening sequences for
circular joints consisting from 4 to 32 bolts are given
in the handbook together with an example tightening procedure.
A training course handbook is provided that
contains background information to the material presented
in the course, together with appendices containing tables
of thread size details, fastener material strengths and a
glossary detailing the key terms used in bolting technology.
training course is also available now, online. Click for details.