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TORRINGTON company bearing make up code (2)
Source: China Bearing Network Time: 2013-05-19
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There are two primary layouts of needle roller and cage assemblies; each of which is manufactured in metric or imperial nominal dimensions. FWJ (metric) and WJ (imperial) bearings are usually made with large diameter needles. FWJC (metric) and WJC ( Inch) bearings usually use small diameter needles.
3. Heavy-duty needle bearing heavy-duty needle bearing code in the front code indicates that the bearing is made in metric or inch nominal scale.
The metric nominal scale bearing is indicated by the pre-coded RNA (light series) or FHJ (heavy series). The nominal nominal bearing of the inch is indicated by the pre-code HJ.
When the bearing has a seal; can be indicated by a post-code. The RS in the post-code indicates a one-sided seal; 2RS indicates a double-sided seal.
In the local area where the shaft cannot be used as the inner raceway; the inner ring can be used for both the metric and imperial series. The inner ring is indicated by the front code IR.
4. The type of support roller needle bearing support roller; special layout features and dimensions are indicated by the code of the front code followed by a horizontal line and a rear number.
The pre-code indicates the type of support roller. When the requirement indicates a special layout feature; it is indicated by an additional pre-code; the number after the pre-code indicates the scale of the support roller.
The basic types of support rollers are as follows:
CR-General stud type; full needle YCR-U type clamp type; full needle needle requirement layout feature letter code; should follow the following order S-seal; inner thrust piece; outer and outer surface oxidation treatment B-pillar head Hex wrench jack C-spherical outer ring E-head stud (for CR type)
5. The aircraft frame needle roller bearing is in most bearing codes; the letter number in front of the first digit (or a group of numbers) indicates that the bearing type letter code NBC indicates the aircraft frame bearing with single row needle roller. NBC type bearing is necessary to install In the support box.
The letter code NBE indicates an active self-aligning aircraft frame needle roller bearing with a single row of needle rollers; the letter code NBK indicates an aircraft frame bearing with the same NBE type but with double row needle roller. NBE and NBK bearings are necessary to be installed in Support in the axle box.
4. The letter code NBF indicates that the aircraft frame with a single row of needle rollers supports the roller bearing.
The letter code ATF indicates a single row needle roller; the inner thrust piece and the spherical outer diameter of the aircraft frame seal support roller bearing.
The letter code NBL indicates that the aircraft frame with double row needle roller supports the roller bearing.
The letter code ATL indicates that the double-row needle roller and the inner thrust piece of the aircraft frame seal support roller bearing.
6. Thrust needle roller and cage assembly TORRINGTON thrust needle roller and cage assembly; pre-coded in thrust cylindrical roller and cage assemblies and their corresponding thrust piece designations; indicated in nominal or inch nominal dimensions; and primary layout features .
For example; metric nominal scale roller and cage assemblies or thrust pieces; indicated by the preamble F; no letter F indicates the nominal nominal scale.
FNT and FNTA are good predecessors for the metric nominal scale thrust needle roller and cage assemblies; NTA is the perfect predecessor for the British nominal scale components.
NTH indicates thrust cylindrical roller and cage assembly; large diameter rollers can be used to obtain higher additional loads. These assemblies are made to imperial scale.
The thrust gauges of the nominal scale of the British system are indicated by the pre-code TR; the rear can be added with A; B; C and other letters indicating the thickness of the thrust. The ultra-thin thrust piece of the nominal scale of the British system is indicated by the pre-code TRA. The front code FTA and FTRA separates the metric nominal scale thrust piece with a thickness of 0. 08 MM and 1.0 MM. The metric nominal scale thrust piece with the smallest useful thickness is indicated by the code FTA. In addition, there are other thickness series of metric thrust pieces; such as LS type.
Most thrust pieces are guided by inner diameter; however, some thrust pieces are depicted as outer diameter guide; such thrust pieces are indicated by the letter D; placed after the thickness code. For example; code TRJD indicates thickness J; guided by outer diameter Inch nominal scale thrust piece.
The code NTHA indicates that the thrust cylindrical roller bearing consists of an NTH assembly; a TRI or TRJ inner diameter guided thrust piece and a TRID or TRJD outer diameter guided thrust piece.
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