238/670B.MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs

🔍

238/670B.MB

Bore Diameter:670 mm

Outside Diameter:820 mm

Width:112 mm

Weight:129 kg

Min. Order:1 Piece

The 238/670B.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 238/670B.MB bearing is a Double row spherical roller bearings, symmetric 3 ribs with an inner diameter of 670 mm , an outer diameter of 820 mm, a width of 112 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 2379802 N, its static radial rated load is approximately 6899823 N. It uses CN standard radial clearance, OPEN type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

670 mm

Outside Diameter:

820 mm

Thickness:

112 mm

Weight:

129 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

2379802 N

Static load Capacity, Radial (Cor):

6899823 N

Fatigue Load Limit, Radial:

459910 N

Reference speed (Grease rpm):

359

Limiting speed (Oil rpm):

790

Specifications:

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

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

238..-B-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

238/670B.MB bearings ( 670 mm x 820 mm x 112 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	238/670B.MB
Design Type	B = with fixed central rib
Bore Type	Z = Cylindrical bore
RIC	CN
Row	2
Bearing Type	Double row spherical roller bearings, symmetric 3 ribs
Manufacturer Part Code	238/670B.MB
Equivalent	238/670B.MB
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
Seal type	OPEN
Relubrication	Standard
d φ Inside [inch]	26.378
D Φ Outside [inch]	32.283
B Width [inch]	4.409
n_B Reference speed (grease) [min^–1]	359
n_G Limiting speed (oil) [min^–1]	790
Weight [kg]	129
r(min.) Chamfer [inch]	0.157
D₁ [inch]	30.598
d_s [inch]	0.315
n_s [inch]	0.591
C_r Radial Dynamic [lbf]	534979
C_0r Radial static [lbf]	1551080
C_ur Radial Fatigue [lbf]	103387
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	26.953
D_a(max.) [inch]	31.709
r_a(max.) [mm]	129
Calculation coefficient
e	0.12
Y₀	5.59
Y₁	5.72
Y₂	8.51

The 238/670B.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.

Share this product to:

Let more people see your product

How can you buy 238/670B.MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs on the Internet?
High quality 238/670B.MB ( 129 kg Mass, ID: 670 mm OD: 820 mm WD: 112 mm , 238..-B-MB Series , 2 Rows , CN Radial Clearance , GCr15, GCr15SiMn, SUJ2 Material , 2379802 Radial dynamic , 6899823 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 238/670B.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.

238/670B.MB Double Row Spherical Roller Bearings, Symmetric 3 Ribs

238/670B.MB Related Products »

Product Groups

Information

Category