21304-E1-XL-TVPB Double Row Spherical Roller Bearings

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21304-E1-XL-TVPB

Bore Diameter:20 mm

Outside Diameter:52 mm

Width:15 mm

Weight:0.158 kg

Min. Order:1 Piece

The 21304-E1-XL-TVPB 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 21304-E1-XL-TVPB bearing is a Double row spherical roller bearings with an inner diameter of 20 mm , an outer diameter of 52 mm, a width of 15 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 40921 N, its static radial rated load is approximately 32925 N. It uses CN standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

20 mm

Outside Diameter:

52 mm

Thickness:

15 mm

Weight:

0.158 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

40921

Static load Capacity, Radial (Cor):

32925

Fatigue Load Limit, Radial:

3702

Reference speed (Grease rpm):

9682

Limiting speed (Oil rpm):

16015

Specifications:

Old Designations:

21304-E1-TVPB

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

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

21304-E1-XL-TVPB 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	21304-E1-XL-TVPB
Design Type	E1 = without central rip
Bore Type	Z = Cylindrical bore
RIC	CN
X-Life	XL long life design
Row	2
Bearing Type	Double row spherical roller bearings
Manufacturer Part Code	21304-E1-TVPB
Equivalent	21304-E1-TVPB , 21304E1TVPB
Original Code	21304-E1-TVPB
Cage	TVPB = Plastic cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
d φ Inside [inch]	0.787
D Φ Outside [inch]	2.047
B Width [inch]	0.591
n_B Reference speed (grease) [min^–1]	9682
n_G Limiting speed (oil) [min^–1]	16015
Weight [kg]	0.158
r(min.) Chamfer [inch]	0.043
D₁ [inch]	1.693
d₂ [inch]	1.138
C_r Radial Dynamic [lbf]	9199
C_0r Radial static [lbf]	7401
C_ur Radial Fatigue [lbf]	832
Mounting dimensions
d_a(min.) [inch]	1.063
D_a(max.) [inch]	1.772
r_a(max.) [mm]	0.158
Calculation coefficient
e	0.3
Y₀	2.2
Y₁	2.25
Y₂	3.34

The 21304-E1-XL-TVPB 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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