248/630-MB Double Row Spherical Roller Bearings, Symmetrical

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248/630-MB

Bore Diameter:630 mm

Outside Diameter:780 mm

Width:150 mm

Weight:163 kg

Min. Order:1 Piece

The 248/630-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 248/630-MB bearing is a Double row spherical roller bearings, symmetrical with an inner diameter of 630 mm , an outer diameter of 780 mm, a width of 150 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 3199830 N, its static radial rated load is approximately 8999829 N. It uses CN standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

630 mm

Outside Diameter:

780 mm

Thickness:

150 mm

Weight:

163 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

3199830

Static load Capacity, Radial (Cor):

8999829

Fatigue Load Limit, Radial:

569950

Reference speed (Grease rpm):

223

Limiting speed (Oil rpm):

680

Specifications:

Old Designations:

248/630MB

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:

Z = Cylindrical bore

System of Measurement:

Metric

Series:

248..-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

248/630-MB bearings 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	248/630-MB
Bore Type	Z = Cylindrical bore
RIC	CN
Row	2
Bearing Type	Double row spherical roller bearings, symmetrical
Manufacturer Part Code	248/630MB
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
d φ Inside [inch]	24.803
D Φ Outside [inch]	30.709
B Width [inch]	5.905
n_B Reference speed (grease) [min^–1]	223
n_G Limiting speed (oil) [min^–1]	680
Weight [kg]	163
r(min.) Chamfer [inch]	0.157
d_s [inch]	0.315
n_s [inch]	0.591
C_r Radial Dynamic [lbf]	719321
C_0r Radial static [lbf]	2023161
C_ur Radial Fatigue [lbf]	128124
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	25.394
D_a(max.) [inch]	30.118
r_a(max.) [mm]	163
Calculation coefficient
e	0.17
Y₀	3.86
Y₁	3.95
Y₂	5.88

The 248/630-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 248/630-MB ( 163 kg Mass, ID: 630 mm OD: 780 mm WD: 150 mm , 248..-MB Series , 2 Rows , CN Radial Clearance , GCr15, GCr15SiMn, SUJ2 Material , 3199830 Radial dynamic , 8999829 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 248/630-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.

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