bellazou926@gmail.cpom HAWOTE is doing R&D and producing angular contact bearings, specially 718 series and 719 seires. They usually used as pairs and assembled in DB/DF/DT/TBT/TFT/TT ways, andare widely used in the fields of Machine tool spindle, high frequency motor, steam turbine, centrifugal separator, front wheel of small car, differential pinion shaft, booster pump, drilling platform, food machinery,Oil pump, Roots Blower, Air Compressor, Transmission, fuel injection pump, Printing Machine, Planetary Reducer, Cycloid Reducer, etc.
HAWOTE supplies matched pair angular contact ball bearings with 2, 3, and 4 single bearing combinations. The combinations available for the fixed end of spindles are usually 2 rows (DB, DF, DT), 3 rows (DBD), and 4 rows (DBB) sets. Matched pair bearings are manufactured as sets, so when they are mounted adjacent to each other, a given preload is automatically obtained.
DB matched Pair: Back-to-back Arrangement
Axial loads in both directions and radial loads can be carried. Since the distance between the effective load centers is large, this type is suitable if moments are applied. However, if accuracy of housing is not enough and there is a misalignment in the spindle, internal loads of bearings could be large enough to possibly cause premature failure due to greater moment stiffness.
DF matched pair: Face-to-face Arrangement
Compared with the DB type, the distance between the effective load centers is small, so the capacity to carry moments is inferior to the DB type. On the other hand, this type is suitable for using with housings that have less accuracy or larger shaft deflections due to low bending stiffness of shaft.
DT matched pair:Tandem Arrangement
Axial loads in one direction and radial loads can be carried. Since axial stiffness of this type is twice the value of a single row type, this arrangement is used when the axial load in one direction is heavy.
DBD matched pair: 3 rows Arrangement
Axial loads in both directions and radial loads can be carried. However, the preload distribution to each bearing is not equal, and preload on the counter side (single side) is twice that of other side. Consequently, this type is unsuitable for high speed operation because of the large increase of internal load of the single side which could lead to bearing failure.
DBB matched pair: 4 rows Arrangement
Axial loads in both directions and radial loads can be carried. In conditions that have the same axial clearance as DB arrangement, preload and stiffness are twice that of the DB arrangement. Also, the permissible axial load of a 4 row arrangement is larger than that of a DB arrangement.
Universal matched pair:
Tedin supplies universal matched pair angular contact ball bearings that have the same amount of stand out on both the front and back face. This means that when bearings that have the same reference number are combined, they have the specified amount for each standard preload.
For universal combination bearings, the “V” combination marks on the outer diameter surface of outer ring prevent “direction1′ mistakes, ensure correct matching when they are mounted, and indicate the direction of the contact angle.
For more model numbers,please feel free to contact us.
