248/1180-B-K30-MB-C3 Double Row Spherical Roller Bearings, Symmetric 3 Ribs

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248/1180-B-K30-MB-C3

Bore Diameter:1180 mm

Outside Diameter:1420 mm

Width:243 mm

Weight:810 kg

Min. Order:1 Piece

The 248/1180-B-K30-MB-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 248/1180-B-K30-MB-C3 bearing is a Double row spherical roller bearings, symmetric 3 ribs with an inner diameter of 1180 mm , an outer diameter of 1420 mm, a width of 243 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 8399831 N, its static radial rated load is approximately 27999832 N. It uses C3 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:

243 mm

Weight:

810 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

8399831 N

Static load Capacity, Radial (Cor):

27999832 N

Fatigue Load Limit, Radial:

1579901 N

Reference speed (Grease rpm):

Limiting speed (Oil rpm):

306

Specifications:

Old Designations:

248/1180BK30MBC3

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:

K30 = Tapered bore (taper 1:30)

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

248..-B-K30-MB

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

248/1180-B-K30-MB-C3 bearings ( 1180 mm x 1420 mm x 243 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	248/1180-B-K30-MB-C3
Design Type	B = with fixed central rib
Bore Type	K30 = Tapered bore (taper 1:30)
RIC	C3
Row	2
Bearing Type	Double row spherical roller bearings, symmetric 3 ribs
Manufacturer Part Code	248/1180BK30MB.C3
Equivalent	248/1180BK30MB.C3
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]	9.567
n_B Reference speed (grease) [min^–1]	91
n_G Limiting speed (oil) [min^–1]	306
Weight [kg]	810
r(min.) Chamfer [inch]	0.236
D₁ [inch]	52.953
d_s [inch]	0.374
n_s [inch]	0.697
C_r Radial Dynamic [lbf]	1888282
C_0r Radial static [lbf]	6294362
C_ur Radial Fatigue [lbf]	355161
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]	810
Calculation coefficient
e	0.15
Y₀	4.43
Y₁	4.53
Y₂	6.75

The 248/1180-B-K30-MB-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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248/1180-B-K30-MB-C3 Double Row Spherical Roller Bearings, Symmetric 3 Ribs

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