The DUBO toothed collar ring is an unique addition to the DUBO retaining ring, and is intended for use in combination with high quality steel nuts (8.8). It will now be possible to admit any desired bolt tension without damaging the DUBO retaining ring on account of high bolt and nut loads, whereas this invention also permits to use whatever nut as a locking nut, which can be re-used. By putting the DUBO retaining ring into this toothed collar ring, optimum deformation of the DUBO ring is obtained after tightening the nut. The deformation of the DUBO ring causes the locking and tightening effect according to the DUBO principle.

　　At the spots where the tooths have been provided, the DUBO retaining ring is perforated under high pressure and after complete deformation, constitutes an unity between toothed collar ring and nut. When this situation is obtained, the nut to be locked has come into contact with the steel tooths.

　　Physical properties:

　　Tensile strength up to the elastic limit  7 N/mm2

　　Ultimate tensile strength  26 N/mm2

　　Modulus of elasticity  66 N/mm2

　　Breakdown voltage  18 kV/mm

　　Rockwell hardness  115° R

　　Specific gravity  1,14

　　上海艾的商贸有限公司位于浦东新区，DUBO产品现货供应！