Espesor de las pistas de freno
- Diámetro de montaje
- Diámetro de los agujeros de fijación y su posición
- Distancia de la cara de montaje a la pista de freno
- Diámetro alojamiento de cubetas (disco integral)

suggested translation
--Mounting surface diameter This is where the disc is bolted to the hub by the lug nuts
---Size of the holes for the lug bolts and pattern, usually 4 in square, 4 to 5 inches apart, or 5 spaced around a circle of 4 to 5 inches will be the same pattern as the wheel, es decir aro o en EEUU el rin, donde se monta la llanta, o en Argentina dicen la goma, palabra italiana.
--Distance from the mounting face to the wearing area, this is the path pista, or area that the friccion of the pads, pastillas, fibras wear on the disc, it is a circle bigger than the mounting area, las pista el la area que se gasta, y que se mide para parallelism, it gets warped from heat and has to be , in EEUU, use the term turn on a brake lathe.
++Size of brake cup housing ---without context, is this a compound rear emergency brake with old fashioned cylinders or referring to modern Calipers, disc brakes have caliper housings and seal are o rings, anillos de goma, anillos de cauche, anillo de huille en Costa Rica, == Size of brake calipers, diameter, or diameter of cylinders Cubetas or cups, government site says buckets are the old style hydraulic cylinders, the two repair cups face each other and act as seals for the hydraulic piston contain in the housing, usually referred to as wheel cylinder, cilicdro hidraulico de la rueda, ….

government web site, the small repair cups is translated as buckets, cubetas, but here in Western USA, we refer to them as rubber cups (alguien esta deiciendo copas)

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Note added at 12 hrs (2010-04-17 04:18:29 GMT)
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my apologies, I do not know if cubeta is referring to a backet like part of specail complex disc or rotor, There are hubs with sealed beaings, this is more modern, and thus whould not have dust covers or grease covers, grease cups, 1979 Mitsubishi has dust cups on some of brake system