248/900-B-K30-MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs

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248/900-B-K30-MB

Bore Diameter:900 mm

Outside Diameter:1090 mm

Width:190 mm

Weight:367.3 kg

Min. Order:1 Piece

The 248/900-B-K30-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 248/900-B-K30-MB bearing is a Double row spherical roller bearings, symmetric 3 ribs with an inner diameter of 900 mm , an outer diameter of 1090 mm, a width of 190 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 5199834 N, its static radial rated load is approximately 16699818 N. It uses CN standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

900 mm

Outside Diameter:

1090 mm

Thickness:

190 mm

Weight:

367.3 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

5199834 N

Static load Capacity, Radial (Cor):

16699818 N

Fatigue Load Limit, Radial:

989911 N

Reference speed (Grease rpm):

128

Limiting speed (Oil rpm):

436

Specifications:

Old Designations:

248/900BK30MB

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

248/900-B-K30-MB bearings ( 900 mm x 1090 mm x 190 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	248/900-B-K30-MB
Design Type	B = with fixed central rib
Bore Type	K30 = Tapered bore (taper 1:30)
RIC	CN
Row	2
Bearing Type	Double row spherical roller bearings, symmetric 3 ribs
Manufacturer Part Code	248/900BK30MB
Equivalent	248/900BK30MB
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
Relubrication	Standard
d φ Inside [inch]	35.433
D Φ Outside [inch]	42.913
B Width [inch]	7.480
n_B Reference speed (grease) [min^–1]	128
n_G Limiting speed (oil) [min^–1]	436
Weight [kg]	367.3
r(min.) Chamfer [inch]	0.197
D₁ [inch]	40.571
d_s [inch]	0.315
n_s [inch]	0.591
C_r Radial Dynamic [lbf]	1168922
C_0r Radial static [lbf]	3754119
C_ur Radial Fatigue [lbf]	222531
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	36.142
D_a(max.) [inch]	42.205
r_a(max.) [mm]	367.3
Calculation coefficient
e	0.15
Y₀	4.31
Y₁	4.4
Y₂	6.56

The 248/900-B-K30-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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248/900-B-K30-MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs

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