21306-E1-TVPB-C3 Double Row Spherical Roller Bearings

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21306-E1-TVPB-C3

Bore Diameter:30 mm

Outside Diameter:72 mm

Width:19 mm

Weight:0.381 kg

Min. Order:1 Piece

The 21306-E1-TVPB-C3 Double-row spherical roller bearings are suitable for heavy-load, impact, and eccentric conditions. Classic applications include vibrating screen exciters, crushers, fans, paper machine press rolls, mining conveyor equipment, and marine propulsion shafts.

The 21306-E1-TVPB-C3 bearing is a Double row spherical roller bearings with an inner diameter of 30 mm , an outer diameter of 72 mm, a width of 19 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 71810 N, its static radial rated load is approximately 62815 N. It uses C3 standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

30 mm

Outside Diameter:

72 mm

Thickness:

19 mm

Weight:

0.381 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

71810

Static load Capacity, Radial (Cor):

62815

Fatigue Load Limit, Radial:

7120

Reference speed (Grease rpm):

7278

Limiting speed (Oil rpm):

11977

Specifications:

Structure:

Spherical Roller Bearings

Number of Rows:

Radial Clearance Trade No.:

Bearing Material:

GCr15, GCr15SiMn, SUJ2

Cage Type:

TVPB = Plastic cage, guided on inner ring

Seals Type:

OPEN

Rolling Mlement Material:

GCr15, SUJ2

Bore Type:

Z = Cylindrical bore

System of Measurement:

Metric

Series:

213..-E1-XL-TVPB-C3

Rolling Element:

symmetrical rollers

Transaction Information:

Transport Package:

Standard Export Package

Service:

7*24 hour

Shipping Ways:

by Sea or Air

Country of Origin:

china

Stock:

10 Piece

Port:

Tianjin, Shanghai, Shenzhen, Guangzhou or Qingdao

Payment term:

by T/T in advance

Delivery time:

2-3 days for stock, 25-30 days for bulk production

Detailed description

21306-E1-TVPB-C3 bearings have the advantages of Self-aligning, high load-bearing capacity, impact resistant, and adaptable to heavy loads, and are therefore widely used in the Gearboxes, drive shafts, conveying equipment, general machinery.

Part Number	21306-E1-TVPB-C3
Design Type	E1 = without central rip
Bore Type	Z = Cylindrical bore
RIC	C3
X-Life	XL long life design
Row	2
Bearing Type	Double row spherical roller bearings
Manufacturer Part Code	21306-E1-TVPB-C3
Equivalent	21306-E1-TVPB-C3 , 21306E1TVPB.C3
Original Code	21306-E1-TVPB-C3
Cage	TVPB = Plastic cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
d φ Inside [inch]	1.181
D Φ Outside [inch]	2.835
B Width [inch]	0.748
n_B Reference speed (grease) [min^–1]	7278
n_G Limiting speed (oil) [min^–1]	11977
Weight [kg]	0.381
r(min.) Chamfer [inch]	0.043
D₁ [inch]	2.358
d₂ [inch]	1.634
C_r Radial Dynamic [lbf]	16142
C_0r Radial static [lbf]	14120
C_ur Radial Fatigue [lbf]	1600
Mounting dimensions
d_a(min.) [inch]	1.457
D_a(max.) [inch]	2.559
r_a(max.) [mm]	0.381
Calculation coefficient
e	0.27
Y₀	2.43
Y₁	2.49
Y₂	3.71

The 21306-E1-TVPB-C3 Double-row spherical roller bearings mainly consist of an inner ring, an outer ring, two rows of spherical rollers, a cage, and seals. The outer ring raceway has a spherical structure, while the inner ring has a double-row raceway. The rollers and raceways are logarithmically curved. The cage is typically made of stamped steel or machined brass.

Double-row spherical roller bearings possess excellent self-aligning properties, compensating for shaft deflection, installation errors, and misalignment. They can simultaneously withstand radial loads and bidirectional axial loads, exhibiting extremely high load-bearing capacity and strong impact resistance. Furthermore, the internal clearance can be optimized for vibration conditions, effectively reducing frictional temperature rise.

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