238/670-B-MB-C4 Spherical Roller Bearings With Central Rib Cylindrical Bore

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238/670-B-MB-C4

Bore Diameter:670 mm

Outside Diameter:820 mm

Width:112 mm

Weight:120 kg

Min. Order:1 Piece

The 238/670-B-MB-C4 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 238/670-B-MB-C4 bearing is a Spherical roller bearings With central rib Cylindrical bore 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 2359902 N, its static radial rated load is approximately 6949909 N. It uses C4 standard radial clearance, 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:

120 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

2359902 N

Static load Capacity, Radial (Cor):

6949909 N

Fatigue Load Limit, Radial:

444907 N

Limiting speed (Oil rpm):

522

Specifications:

Old Designations:

238/670BMBC4

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

Rolling Mlement Material:

GCr15, SUJ2

Bore Type:

Z = Cylindrical bore

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

238..-B-MB-C4

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

238/670-B-MB-C4 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	238/670-B-MB-C4
Design drawing	2
Design Type	B = with fixed central rib
Bore Type	Z = Cylindrical bore
RIC	C4
Row	2
Bearing Type	Spherical roller bearings With central rib Cylindrical bore
Manufacturer Part Code	238/670BMBC4
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
d φ Inside [inch]	26.378
D Φ Outside [inch]	32.283
B Width [inch]	4.409
n_G Limiting speed (oil) [min^–1]	522
Weight [kg]	120
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]	530505
C_0r Radial static [lbf]	1562339
C_ur Radial Fatigue [lbf]	100015
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]	120
Calculation coefficient
e	0.12
Y₀	5.59
Y₁	5.72
Y₂	8.51

The 238/670-B-MB-C4 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 238/670-B-MB-C4 ( 120 kg Mass, ID: 670 mm OD: 820 mm WD: 112 mm , 238..-B-MB-C4 Series , 2 Rows , C4 Radial Clearance , GCr15, GCr15SiMn, SUJ2 Material , 2359902 Radial dynamic , 6949909 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 238/670-B-MB-C4. 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.

238/670-B-MB-C4 Spherical Roller Bearings With Central Rib Cylindrical Bore

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