Cluster 01 · 5 articles planned · 5 published
Standards & Specifications
Which standards govern gear couplings and why they differ by region
Almost every dispute about a gear coupling ends up being a dispute about which document governs it — and, just as often, about whether a cited document governs the coupling at all or just one component of it. A catalogue coupling bored to AGMA 9002 and one supplied against IS 12405 differ in tolerance system and in how much of the coupling the document covers, while a seal or spline standard cited on the same drawing may govern nothing more than that component.
This cluster maps the documents an engineer is most likely to encounter: AGMA 9002 for inch-series bores and keyways, IS 12405 for gear couplings supplied to Indian specifications, ISO 14691 for general-purpose petroleum service, and ISO 6194-1 / DIN 5480 for the seal and spline component standards referenced alongside whichever of the above actually governs the coupling. Each article states the scope of the standard and the points where a specification written against one document cannot be satisfied by another.
Where standards conflict, we cite the clause number and the revision year. Standards are revised; treat every clause reference here as a pointer to the source document rather than a substitute for it.
Articles in this cluster
3 min readFlagship
AGMA vs DIN vs IS: which standard governs your coupling?
Only one of these documents governs a whole gear coupling — the others govern the bore, the spline and the seal. What each one actually covers, and which to name on a purchase order.
8 min read
AGMA 9002: bores and keyways for flexible couplings
The inch-series bore tolerance and keyway practice most catalogue couplings are dimensioned to, and the limits of what compliance actually certifies.
5 min read
ISO 6194 and DIN 5480: seals and splines
Two component standards frequently cited on coupling drawings — rotary shaft lip seals and involute splined connections — why DIN 3761 is the wrong seal reference, and what neither governs.
3 min read
IS 12405: the Indian standard for gear type flexible couplings
What the Bureau of Indian Standards specification covers — Type A and Type B, materials, sealing, lubrication and marking — and what it leaves to the manufacturer.
4 min read
ISO 14691: flexible couplings for mechanical power transmission
The general-purpose petroleum industry standard, its relationship to ISO 10441 for special-purpose service, and where the boundary between them falls.