21308 EKW Spherical Roller Bearings, Stamping Steel Cage, Tapered Bore

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21308 EKW

Bore Diameter:40 mm

Outside Diameter:90 mm

Width:23 mm

Weight:0.738 kg

Min. Order:1 Piece

The 21308 EKW 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 21308 EKW bearing is a Spherical roller bearings, double row with an inner diameter of 40 mm , an outer diameter of 90 mm, a width of 23 mm. High-carbon chromium steel rings, High-carbon chromium steel rolling mlement. Its dynamic radial rated load is approximately 98883 N, its static radial rated load is approximately 99897 N. It uses CN standard radial clearance, Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

40 mm

Outside Diameter:

90 mm

Thickness:

23 mm

Weight:

0.738 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

98883 N

Static load Capacity, Radial (Cor):

99897 N

Reference speed (Grease rpm):

6970

Limiting speed (Oil rpm):

9460

Specifications:

Old Designations:

21308EKW

Structure:

Spherical Roller Bearings

Number of Rows:

Radial Clearance Trade No.:

Bearing Material:

High-carbon chromium steel

Cage Type:

Stamping steel cage

Seals Type:

Open

Rolling Mlement Material:

High-carbon chromium steel

Bore Type:

K = Tapered bore, taper 1:12

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

213.. -EKW

Rolling Element:

spherical rollers

Transaction Information:

Transport Package:

Standard Export Package

Service:

7*24 hour

Shipping Ways:

by Sea or Air

Country of Origin:

china

Stock:

200 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

21308 EKW bearings ( 40 mm x 90 mm x 23 mm) 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	21308 EKW
Manufacturer Part Code	21308EKW
Internal design	E = Optimized internal design for increased load carrying capacity
Bearing Type	Spherical roller bearings, double row
m Weight [lb]	1.627
Seal type	Open
Series	213.. -EKW
Cage	Stamping steel cage
Lubrication	None
Bore Type	K = Tapered bore, taper 1:12
Radial internal clearance	CN
Units	Metric
C_r Dynamic Radial [lbf]	22228
C_0r Static Radial [lbf]	22456
P_u Fatigue Radial [lbf]	2687
Operating temperature - T(min) [°C]	-30
Operating temperature - T(max) [°C]	+200
n_B Speed ratings (grease) [rpm]	6970
n_G Speed ratings (oil) [rpm]	9460
Heat stabilization	392 °F (200 °C)
Dimension
d φ Inside [inch]	1.575
D Φ Outside [inch]	3.543
B Width [inch]	0.906
d₂ [inch]	2.362
D₁ [inch]	3.142
r_a(max.) Fillet [inch]	0.059
r₁,r₂(min.) Fillet [inch]	0.059
Angular misalignment	1 degree
Abutment dimensions
d_a(min.) [inch]	1.858
D_a(max.) [inch]	3.189
Calculation factor
e	0.24
Y₁	2.8
Y₂	4.2
Y₀	2.8

The 21308 EKW 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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High quality 21308 EKW ( 0.738 kg Mass, ID: 40 mm OD: 90 mm WD: 23 mm , 213.. -EKW Series , 2 Rows , CN Radial Clearance , High-carbon chromium steel Material , 98883 Radial dynamic , 99897 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 21308 EKW. then click the button " Send " The web site will make your purchasing information sent to the supplier's mailbox, who will come to contact you upon they get your information at the first time.

21308 EKW Spherical Roller Bearings, Stamping Steel Cage, Tapered Bore

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