Tenvor Springs — Technical Journal
Engineering Notes
Technical writing on spring design, manufacturing processes, failure analysis and sourcing — from the shop floor.
Why do springs fail?
You have a broken spring in your hand. The fracture surface almost always tells you why — if you can read it. Diagnosis in four parts.
Diagnosis from the fracture surface: where to look
PublishedFatigue, or a single overload?
SeptemberCorrosion-driven failures and the salted-road effect
OctoberHydrogen embrittlement: springs that break after coating
NovemberLatest Articles
Two new articles a month12 items every spring drawing needs
An incomplete drawing doubles quoting time. The checklist.
Buckling in compression springs: the slenderness limit
If the spring moves sideways despite a correct calculation, the ratio is the problem.
Spring coatings compared: zinc phosphate, epoxy, e-coat
Which coating lasts how long in which corrosion class?
Hot presetting: why springs sag and how to stop it
The story of a spring that loses free length in service.
Initial tension and end selection in extension springs
Extension springs nearly always fail at the end. Why, and what to do.
How eddy current crack detection works
Finding sub-surface cracks without damaging the part.
Publishing Schedule
Articles in the queueWhen do you actually need stainless spring steel?
Materials6 minSpring tolerances: DIN 2095 and 2096 quality grades
Quality8 minTorsion spring moment calculation and the wind-direction error
Design7 minFrom sample to series: the PPAP process step by step
Sourcing9 minSpring end types: closed, open, ground — which and when?
Design5 minCold coiled or hot coiled? What actually decides it
Process7 minHave a spring question of your own?
Send us the drawing, the load case or a broken sample — our engineering team reviews it at no cost.