BMT All-Steel Bearhug

This series of BEARHUG Locknuts, with a spring metal collar insert, is designed in accordance with ISO standard 2982, but with the added features of self-locking and super precision at elevated temperatures wherein it has become a most important component for precision bearing and power transmission assemblies.

This quality series of BEARHUG is manufactured with quality threads of tolerance grade and position 4H. This is more comparable to the Class 3 thread of the current American retaining nuts, which the usual 5H tolerance grade and position of the threads for bearing retaining nuts does not uniformly reach. The 5H is more comparable to Class 2.

This upgrading allows a user of these self-locking nuts to confidently interchange with the nuts of various national manufacture and national standard for metric dimensioned locknuts. The runout of the bearing face to the pitch diameter has a one revolution total indicator reading no greater than: 10 microns (.0004 inches) for sizes 00 through 045, 15 microns (.0006 inches) for sizes 05 through 20, 20 microns (.0008 inches) for sizes 21 through 40.

Surface finish of bearing face is within 1 micron.