Super Purchasing for 31307 Bearing - Double Row Tapered Roller Bearings – Chengfeng Bearing

Details

Double row tapered bearings can bear bidirectional axial loads while bearing radial loads. The bidirectional axial movement of the shaft or housing can be limited within the range of the bearing’s axial clearance.
Tapered roller bearings are separable bearings, that is, two inner rings, rollers and cages are combined into an independent component, which can be installed separately from the overall double raceway outer ring (with inner spacer). A double raceway inner ring and rollers and cage form a separate assembly, mounted separately from the two individual raceway outer races (with outer spacers).

Applications

Such bearings are mainly used in automobile front wheels, rear wheels, transmissions, differentials, pinion shafts, machine tool spindles, construction machinery, large agricultural machinery, railway vehicles, gear reduction devices, rolling mill roll neck small reduction devices, cement machinery , Rotary kiln equipment retaining wheel.

SIZE

Inner diameter size range: 38mm~1560mm
Outer diameter size range: 70mm~1800mm
Width size range: 50mm~460mm

Metric (Imperial) product accuracy has ordinary grade, P6 grade, P5 grade, P4 grade. For users with special requirements, P2 grade products can also be processed, and the tolerance is in line with GB/T307.1.
cage

Tapered roller bearings generally use a steel stamped basket cage, but when the size is larger, a car-made solid pillar cage is also used.
Prefix:
In F inch tapered roller bearings, add “F” before the bearing series number, indicating the bearing cage
G In inch tapered roller bearings, it means the bearing inner spacer or outer spacer
Inner spacer representation method: add “G-” before the component code of the inch series bearing
In K inch tapered roller bearings, the bearing rings and rolling elements or only the rings are made of high carbon chromium bearing steel
In K1 inch tapered roller bearings, the bearing rings and rolling elements or only the rings are made of 100CrMo7
In K2 inch tapered roller bearings, the bearing rings and rolling elements or only the rings are made of ZGCr15
R In inch tapered roller bearings, add “R” before the bearing series number to indicate tapered rollers
Postcode:
A: 1. For tapered roller bearings, the contact angle a and the outer ring raceway diameter D1 are inconsistent with the national standard. If there are two or more types of a and D1 different from the national standard in the code, use A and A1 in turn. , A2… indicates.
2. Outer ring guide.
A6 inch tapered roller bearing assembly chamfer is inconsistent with TIMKEN. When there are two or more different dry TIMKEN assembly chamfers in the same code, they are represented by A61 and A62.
B tapered roller bearings, the contact angle is increased (increase an angle series).
C paired with tapered roller bearings, when the axial clearance does not meet the standard requirements, the average value of the axial clearance is directly added behind C.
/CR paired with tapered roller bearings, when there is a requirement for radial clearance, the average value of radial clearance is added behind CR.
D double row tapered roller bearings, no inner spacer or outer spacer, no end face grinding In inch tapered roller bearings, it means double raceway inner ring or double raceway outer ring.
/DB Two tapered roller bearings for back-to-back mounting in pairs
/DBY Two single row tapered roller bearings for back-to-back mounting, with inner spacer and without outer spacer.
/DF Two tapered roller bearings for face-to-face pair mounting
D1 double row tapered roller bearing, without inner spacer, ground face.
/HA ring rolling elements and cages or just the rings and rolling elements are made of vacuum smelted bearing steel.
/HC ferrules and rolling elements or only the ferrules or only the rolling elements are made of carburized steel (/HC-20Cr2Ni4A;/HC1-20Cr2Mn2MoA;/HC2-15Mn;/HC3-G20CrMo)
/HCE If it is a metric bearing, it means that the rings and rolling elements are high-quality carburized steel.
/HCER means if only the rollers in the metric bearing are high quality carburized steel.
/HCG2I means that the outer ring and rolling elements are made of carburized steel, and the inner ring is made of GCr18Mo.
/HCI indicates that the inner ring is made of carburized steel.
/HCO indicates that the outer ring is made of carburized steel.
/HCOI means that only the outer ring and inner ring are made of carburized steel.
/HCOR indicates that the outer ring and rolling elements are made of carburized steel.
/HCR: Indicated to distinguish the same specification, only the rolling elements are made of carburized steel.
/HE ring rolling elements and cages or only the rings and rolling elements are made of electroslag remelted bearing steel (military steel)
/HG: Made by ZGCr15.