ISO Rolamentos de rolos gravados

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The original metric part-numbering system for tapered roller bearings was based on the ISO 15 dimensional plan for radial bearings.

ISO introduced a new numbering system for tapered roller bearings in the ISO 355 plan. This numbering system uses three alphanumeric fields to define a dimension series. The bearing part number is defined by adding the inner ring bore diameter after the dimension series..

ABMA (inch) part numbers designed with metric envelope dimensions are identified with a J-prefix. Many of these part numbers have been assigned an ISO dimension series.The latest ISO 355 plan includes an expanded range of metric bearings originally designed by The Timken Company. These bearings are identified with a J-prefix.

ABMA standard 20 defines 5 classes: ABEC 1, ABEC 3, ABEC 5, ABEC 7, and ABEC 9. Instrument series ball bearings are defined in standards 12.1 and 12.2 and carry the suffix “P”. Extra thin and thin section ball bearings defined in standards 12.1 and 12.2 carry the suffix “T”. The higher the number of the classification, the tighter the tolerances become resulting in higher precision of the assembled bearing. When the classification system was first set up, machine tool technology was such that manufacturers mass produced only ABEC 1, and sometimes ABEC 3. Bearings for the higher classifications were selected from the production runs of the lower classification. Today, the technology has advanced to the point where manufacturers can produce ABEC 7 and ABEC 9 bearings routinely.

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Bearing Number	Bore Dia	Outer DIa	Width	Size
71,438 mm x 120 mm x 32,545 mm ISO 47490/47420 Rolamentos de rolos gravados	360141	835.02 mm	835.02 mm	710 mm
101,6 mm x 136,525 mm x 21,433 mm ISO L420449/10 Rolamentos de rolos gravados	55 mm	0,6 mm	HCB7011-E-T-P4S	90
80 mm x 125 mm x 29 mm ISO 32016 Rolamentos de rolos gravados	110 mm	3 mm	50 mm	80 mm x 125 mm x 29 mm
25,4 mm x 57,15 mm x 19,837 mm ISO 1780/1729 Rolamentos de rolos gravados	NNU4938K	69	260 mm	475 kN
30 mm x 55 mm x 20 mm ISO 33006 Rolamentos de rolos gravados	3,175	3,175 mm	30 mm x 55 mm x 20 mm	3,571 mm
114,3 mm x 180 mm x 41,275 mm ISO 64450/64708 Rolamentos de rolos gravados	1.08	114,3 mm x 180 mm x 41,275 mm	3.6 mm	82.931
31,75 mm x 76,2 mm x 28,575 mm ISO HM89440/10 Rolamentos de rolos gravados	45 mm	12 mm	2 mm	10,2 mm
44,45 mm x 104,775 mm x 29,317 mm ISO 460/453X Rolamentos de rolos gravados	62 mm	0.6 mm	0,24 Kg	1 mm
28 mm x 68 mm x 18 mm ISO 303/28 Rolamentos de rolos gravados	25 mm	8 mm	7 mm	3,296 kN
180 mm x 380 mm x 126 mm ISO 32336 Rolamentos de rolos gravados	NACHI	24 mm	180 mm x 380 mm x 126 mm	40 mm
69,952 mm x 121,442 mm x 23,012 mm ISO 34274/34478 Rolamentos de rolos gravados	0.051	15,0876	0.500	0.0040
69,952 mm x 125,052 mm x 23,012 mm ISO 34274/34492A Rolamentos de rolos gravados	3 100 r/min	30	210 kN	130 mm