Home>Bearing knowledge>What are the grades of rolling bearing dividends?

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Which grades are the rolling bearing dividends?

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According to GB/T307. 1-94 "Xuanxin Bearing", the radial bearing other than the tapered roller bearing is divided into 0, 6, 5, 4, 2, and the tapered roller bearing is divided into 0. , 6X, 5, 4, according to GB/T307. 4-94 "Thrust ball bearing public service" thrust ball bearings are divided into 0, 6, 5, 4, according to JB5286-91 "machine tool spindle with fine rolling bearings to make up the skills 》Rules of the machine tool spindle with fine rolling bearings - double row cylindrical roller bearings SP and UP public service, JB / T6362 "machine tool spindle with two-way thrust angle touch ball bearings SP and UP level public service.

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Oil Casing

The steel grades of common oilfield API-5CT Casing Pipe include J55,K55,N80-1,N80Q and P110.Casing pipe is mostly used for oil well drilling.In accordance with API-5CT and ISO11960 standard,pipes can be classified as STC(short thread),LTC(long thread) and BTC(buttress thread) accompanied with their couplings.

Oilfield Casing Pipes are positioned into well bore and cemented in place to secure both subsurface formations and the wellbore from collapsing,also to enable drilling mud to circulate and extraction to take place.

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