231/670-B-K-MB-C4 Spherical Roller Bearings With Central Rib Tapered Bore(K = Taper 1:12)

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231/670-B-K-MB-C4

Bore Diameter:670 mm

Outside Diameter:1090 mm

Width:336 mm

Weight:1240 kg

Min. Order:1 Piece

The 231/670-B-K-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 231/670-B-K-MB-C4 bearing is a Spherical roller bearings With central rib Tapered bore(K = taper 1:12) with an inner diameter of 670 mm , an outer diameter of 1090 mm, a width of 336 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 10999930 N, its static radial rated load is approximately 23999949 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:

1090 mm

Thickness:

336 mm

Weight:

1240 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

10999930 N

Static load Capacity, Radial (Cor):

23999949 N

Fatigue Load Limit, Radial:

1559925 N

Reference speed (Grease rpm):

215

Limiting speed (Oil rpm):

450

Specifications:

Old Designations:

231/670BKMBC4

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:

K = Tapered bore (K = taper 1:12)

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

231..-B-K-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

231/670-B-K-MB-C4 bearings ( 670 mm x 1090 mm x 336 mm) have the advantages of Self-aligning, high load-bearing capacity, impact resistant, and adaptable to heavy loads, and are therefore widely used in the Gearboxes, drive shafts, conveying equipment, general machinery.

Part Number	231/670-B-K-MB-C4
Design drawing	2
Design Type	B = with fixed central rib
Bore Type	K = Tapered bore (K = taper 1:12)
RIC	C4
Row	2
Bearing Type	Spherical roller bearings With central rib Tapered bore(K = taper 1:12)
Manufacturer Part Code	231/670BKMBC4
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
d φ Inside [inch]	26.378
D Φ Outside [inch]	42.913
B Width [inch]	13.228
n_B Reference speed (grease) [min^–1]	215
n_G Limiting speed (oil) [min^–1]	450
Weight [kg]	1240
r(min.) Chamfer [inch]	0.295
D₁ [inch]	37.331
d_s [inch]	0.492
n_s [inch]	0.925
C_r Radial Dynamic [lbf]	2472784
C_0r Radial static [lbf]	5395188
C_ur Radial Fatigue [lbf]	350671
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	27.638
D_a(max.) [inch]	41.653
r_a(max.) [mm]	1240
Calculation coefficient
e	0.31
Y₀	2.16
Y₁	2.21
Y₂	3.29

The 231/670-B-K-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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231/670-B-K-MB-C4 Spherical Roller Bearings With Central Rib Tapered Bore(K = Taper 1:12)

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