In short: FLN Tutors gives machine design assignment help and tutoring for mechanical engineering students. Tutors explain the design process, materials selection, factors of safety, failure theories, design for fatigue and the Goodman criterion, shafts, keys and couplings, bolted and welded joints, springs, gears, bearings and belts step by step, with worked design calculations to the codes and data books your course uses. Matched to a verified specialist who knows your course, your university's marking criteria, and your deadline.
Topics we cover
FLN offers one-to-one online Machine Design tutoring with verified subject specialists. Sessions focus on calculations, design problems and the theory behind them, including Machine Elements, Gear Design, Shaft Design and Bearings, using your own course material, so you understand the subject and can apply it yourself.
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Machine design help is one-to-one support from a mechanical engineer who explains how machine elements are sized and checked, and helps you complete design calculations, drawings and reports. For stress and deflection basics, see strength of materials help.
| What you need | Best option | What you get |
|---|---|---|
| Regular lessons through a machine design module | Live one-to-one tutoring | Design methods explained |
| Design problems you are stuck on | Homework help | Step-by-step worked solutions |
| A graded design project | Assignment help | Guidance within your university's rules |
This map lists the core machine design topics, the point where students most often get stuck, and how a tutor helps you past it.
| Topic | Where students get stuck | How a tutor helps |
|---|---|---|
| Design process | From requirements to detailed design | Design process maps |
| Failure theories | Maximum shear stress and von Mises | Theory comparison tables |
| Fatigue | Endurance limit and the Goodman line | Worked fatigue checks |
| Shafts | Sizing for torque and bending | Worked shaft designs |
| Joints | Bolts, welds and rivets | Worked bolt selection |
| Springs | Helical spring design | Worked spring calculations |
| Gears | Spur gear strength and wear | Worked gear checks |
| Bearings | Rolling bearing life | Worked bearing selection |
Tutors cover machine design I and II syllabi.
| Area | Topics |
|---|---|
| Foundations | Design process, materials, standards, tolerances and fits |
| Static design | Stress concentration, failure theories, factor of safety |
| Fatigue | S–N curves, endurance limit, Goodman, Soderberg and Gerber criteria |
| Power transmission | Shafts, keys, couplings, belts, chains |
| Joints | Bolted, welded and riveted joints |
| Gears | Spur, helical, bevel and worm gears |
| Other elements | Springs, bearings, clutches, brakes, flywheels |
A shaft transmits 10 kW at 1,440 rpm. The allowable shear stress is 40 MPa.
| Step | Working | Result |
|---|---|---|
| Torque | T = 60P ÷ (2πN) = 60 × 10,000 ÷ (2π × 1,440) | ≈ 66.3 N·m |
| Diameter | d = (16T ÷ (π τ))^(1/3) = (16 × 66,300 ÷ (π × 40))^(1/3) | ≈ 20.4 mm |
| Select a standard size | Next standard diameter up | 22 mm or 25 mm, then check bending and keyway effects |
A keyway reduces strength, so many courses apply a factor or check combined bending and torsion.
Two common design checks.
| Question | Working | Answer |
|---|---|---|
| A bolt carries 20 kN in tension with an allowable stress of 100 MPa. Stress area needed? | 20,000 ÷ 100 | 200 mm², so choose M20 (stress area 245 mm²) |
| Alternating stress 80 MPa, mean stress 120 MPa, endurance limit 250 MPa, ultimate strength 600 MPa. Goodman safety factor? | 1 ÷ n = 80 ÷ 250 + 120 ÷ 600 = 0.52 | n ≈ 1.92 |
Use corrected endurance limits (surface, size and reliability factors) as your data book specifies.
Tutors match your level, syllabus and exam board, from school to PhD.
| Level | What you study | Matching help |
|---|---|---|
| Diploma | Basic machine elements | Live tutoring and homework help |
| Undergraduate mechanical engineering | Machine design I and II | Engineering Physics, Engineering Mathematics |
| Design projects | Gearboxes, presses and machine assemblies | Assignment help |
| Master's and research | Advanced design and optimisation | Dissertation help |
Related: Mechanical Engineering, Strength of Materials, Finite Element Analysis and Engineering Drawing.
Most lost marks come from skipped checks and non-standard sizes.
| Mark-loser | What to do instead |
|---|---|
| Non-standard final dimensions | Round to standard sizes from the data book |
| Ignoring stress concentration | Apply stress concentration factors at keyways and shoulders |
| Static check only | Check fatigue for fluctuating loads |
| Uncorrected endurance limit | Apply surface, size and reliability factors |
| No factor of safety justification | Explain the chosen factor of safety |
| Missing drawings | Include dimensioned sketches or drawings |
Machine design is assessed in several formats, and each one is marked on different things. Tutors help you understand the brief and the marking criteria before you start.
| Assessment | What markers look for |
|---|---|
| Design problems | Complete calculations with standard sizes |
| Design projects | Full design of an assembly with drawings |
| Exams | Element design under time pressure |
| Lab and tutorial work | Data book use and checks |
| Reports | Design decisions and checks explained |
Machine designers use these tools.
| Tool | What it is used for |
|---|---|
| Design data books such as PSG | Standard sizes and factors |
| Standards such as IS, ISO and ANSI | Design rules |
| Excel | Design calculations |
| SolidWorks or CATIA | 3D modelling |
| FEA software | Checking complex parts |
Machine design is taught to similar core ideas worldwide, but grading, referencing and course structure differ. FLN tutors work from your own syllabus and handbook and schedule lessons in your time zone. Always follow your module handbook for referencing.
| Country | Where machine design is studied | Grading | Referencing usually used |
|---|---|---|---|
| United Kingdom | BEng mechanical engineering design modules | GCSE 9–1, A-level A*–E; degrees First, 2:1, 2:2, Third | IEEE or Harvard |
| United States | Machine design courses using Shigley | Letter grades A–F and a 4.0 GPA scale | IEEE |
| Australia | Mechanical engineering degrees | HD, D, C, P at university; ATAR for school leavers | IEEE or Harvard |
| Canada | Mechanical engineering programmes | Letter grades or percentages; GPA scales vary by province and university | IEEE |
| India | B.Tech/BE mechanical engineering design of machine elements using the PSG data book, and GATE | Board exam percentages; university CGPA, often on a 10-point scale | IEEE |
Students in Ireland, the Gulf, Europe, Africa and Asia can book the same help, with lessons in their own time zone.
The price of machine design help depends on the type of task and your deadline. A single element design costs less than a full assembly project. You always see the price first: a fixed quote for homework and assignment guidance, or the tutor's hourly rate for live lessons, with no contract and no minimum number of sessions. Refunds follow our refund policy.
Stuck on a Machine Design question?
Send it to a Machine Design tutor for step-by-step working. The quote is free.
What you get
Simple process
Tell us your assignment brief, word count, deadline, and academic level. The more detail, the better the match.
We pair you with a Machine Design expert whose background aligns with your specific topic and university requirements.
Your work arrives before the deadline, plagiarism-checked. Free revisions until it meets your exact requirements.
Takes about two minutes. The quote is free.
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Every expert is degree-verified and quality-tested before joining.
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Student reviews
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Yes. Tutors explain methods and help with calculations, drawings and reports, within your university's rules.
Designing machine elements and assemblies so they perform safely and reliably under expected loads.
The ratio of a part's strength to the stress it is expected to carry.
An equivalent stress used to predict yielding of ductile materials under combined stresses.
The stress below which a material can, in theory, survive infinite cycles of loading.
A fatigue failure line combining alternating and mean stress: σa/Se + σm/Sut = 1/n.
Use d = (16T ÷ πτ)^(1/3), then check bending, keyways and standard sizes.
Find the required stress area from load and allowable stress, then pick a standard size with enough area.
Higher local stress at holes, notches and changes of section.
For ball bearings, L10 = (C ÷ P)³ million revolutions, where C is dynamic load rating and P is equivalent load.
A formula for the bending strength of gear teeth.
Soderberg uses yield strength instead of ultimate strength and is more conservative.
Using shear stress with the Wahl factor and the deflection formula for the required stiffness.
Yes. Tutors show you how to find and apply data book values.
It involves many checks; a clear step-by-step procedure makes it manageable.
Tutors work from your course text, such as Shigley or V.B. Bhandari.
Often, yes, for short problems, depending on tutor availability.
Yes. Tutors help with gears, shafts, bearings and drawings.
Yes. Tutoring, worked examples and feedback are a normal part of learning. You should use the explanations to understand the method and submit your own work in line with your school's or university's academic integrity rules. See our academic integrity policy.
Yes. Your files and details are used only to help you and are not shared with your school or university. See our privacy policy.
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