249/850-B-K30-MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs

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249/850-B-K30-MB

Bore Diameter:850 mm

Outside Diameter:1120 mm

Width:272 mm

Weight:712.9 kg

Min. Order:1 Piece

The 249/850-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 249/850-B-K30-MB bearing is a Double row spherical roller bearings, symmetric 3 ribs with an inner diameter of 850 mm , an outer diameter of 1120 mm, a width of 272 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 8399814 N, its static radial rated load is approximately 22499818 N. It uses CN standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

850 mm

Outside Diameter:

1120 mm

Thickness:

272 mm

Weight:

712.9 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

8399814 N

Static load Capacity, Radial (Cor):

22499818 N

Fatigue Load Limit, Radial:

1399918 N

Reference speed (Grease rpm):

133

Limiting speed (Oil rpm):

420

Specifications:

Old Designations:

249/850BK30MB

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:

249..-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

249/850-B-K30-MB bearings ( 850 mm x 1120 mm x 272 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	249/850-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	249/850BK30MB
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
Relubrication	Standard
d φ Inside [inch]	33.465
D Φ Outside [inch]	44.094
B Width [inch]	10.709
n_B Reference speed (grease) [min^–1]	133
n_G Limiting speed (oil) [min^–1]	420
Weight [kg]	712.9
r(min.) Chamfer [inch]	0.236
D₁ [inch]	40.705
d_s [inch]	0.492
n_s [inch]	0.925
C_r Radial Dynamic [lbf]	1888278
C_0r Radial static [lbf]	5057959
C_ur Radial Fatigue [lbf]	314701
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	34.370
D_a(max.) [inch]	43.189
r_a(max.) [mm]	712.9
Calculation coefficient
e	0.23
Y₀	2.92
Y₁	2.98
Y₂	4.44

The 249/850-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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High quality 249/850-B-K30-MB ( 712.9 kg Mass, ID: 850 mm OD: 1120 mm WD: 272 mm , 249..-B-K30-MB Series , 2 Rows , CN Radial Clearance , GCr15, GCr15SiMn, SUJ2 Material , 8399814 Radial dynamic , 22499818 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 249/850-B-K30-MB. 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.

249/850-B-K30-MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs

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