238/1180-B-K-MB Double Row Spherical Roller Bearings, Main Dimensions To DIN 635-2

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238/1180-B-K-MB

Bore Diameter:1180 mm

Outside Diameter:1420 mm

Width:180 mm

Weight:558 kg

Min. Order:1 Piece

The 238/1180-B-K-MB 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 238/1180-B-K-MB bearing is a Double row spherical roller bearings, main dimensions to DIN 635-2 with an inner diameter of 1180 mm , an outer diameter of 1420 mm, a width of 180 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 5999839 N, its static radial rated load is approximately 19199803 N. It uses CN standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

1180 mm

Outside Diameter:

1420 mm

Thickness:

180 mm

Weight:

558 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

5999839 N

Static load Capacity, Radial (Cor):

19199803 N

Fatigue Load Limit, Radial:

1129933 N

Reference speed (Grease rpm):

194

Limiting speed (Oil rpm):

406

Specifications:

Old Designations:

238/1180BKMB

Structure:

Spherical Roller Bearings

Number of Rows:

Radial Clearance Trade No.:

Bearing Material:

GCr15, GCr15SiMn, SUJ2

Cage Type:

MB = Solid brass cage, guided on inner ring

Seals Type:

OPEN

Rolling Mlement Material:

GCr15, SUJ2

Bore Type:

K = Tapered bore (taper 1:12)

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

238..-K

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

238/1180-B-K-MB bearings ( 1180 mm x 1420 mm x 180 mm) have the advantages of Self-aligning, high load-bearing capacity, and impact resistant, and are therefore widely used in the Mining machinery, metallurgical equipment, papermaking machinery, vibrating screens, wind turbines, and large industrial gearboxes.

Part Number	238/1180-B-K-MB
Design Type	B = with fixed central rib
Bore Type	K = Tapered bore (taper 1:12)
RIC	CN
Row	2
Bearing Type	Double row spherical roller bearings, main dimensions to DIN 635-2
Manufacturer Part Code	238/1180BK.MB
Equivalent	238/1180BK.MB
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
Relubrication	Standard
d φ Inside [inch]	46.457
D Φ Outside [inch]	55.905
B Width [inch]	7.087
n_B Reference speed (grease) [min^–1]	194
n_G Limiting speed (oil) [min^–1]	406
Weight [kg]	558
r(min.) Chamfer [inch]	0.236
D₁ [inch]	53.303
d_s [inch]	0.374
n_s [inch]	0.697
C_r Radial Dynamic [lbf]	1348763
C_0r Radial static [lbf]	4316115
C_ur Radial Fatigue [lbf]	254008
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	47.362
D_a(max.) [inch]	55.000
r_a(max.) [mm]	558
Calculation coefficient
e	0.11
Y₀	6.04
Y₁	6.18
Y₂	9.2

The 238/1180-B-K-MB 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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238/1180-B-K-MB Double Row Spherical Roller Bearings, Main Dimensions To DIN 635-2

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