Mechanical Parts

Fasteners in this database go all the way down to one page per size —2,538 of them, each with a full nominal dimension table. Bearings have now joined them: 764 designations across 33 dimension series and 9 bearing types, each with the boundary dimensions of its own plan (ISO 15, ISO 104, ISO 355, ISO 1206 and ISO 3245) and its own page. AS568 O-rings have joined them on a different footing: 369 dash sizes across 6 series, each with the inside diameter, the cord and both tolerances, drawn from two independent manufacturer tables compared cell by cell. The other 12 families are not there yet, and the honest thing is to say so rather than to publish pages that look complete and are not.

What follows is the taxonomy: the families a component database has to cover, and the designation system each one is specified in. Where a family already has a home on this site the card links to it; where it does not, the card is marked planned and does not pretend to be clickable.

A card carries a drawing of one representative designation, with the parameters that designation is actually made of dimensioned on it — pitch on 08B chain, the pitch circle on a gear. On the families with no table behind them that drawing is a schematic and nothing more, because there is nothing to derive it from. The bearing and O-ring drawings are the exception, and they are the difference a real data source makes: each is drawn from its own designation’s boundary dimensions — whatever set that type’s plan defines, from the bore out to the chamfer on the types whose plan gives one — or from its own dash-number row.