24948-B-K30-MB-C4 Spherical Roller Bearings With Central Rib Tapered Bore (K30 = Taper 1:30)

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24948-B-K30-MB-C4

Bore Diameter:240 mm

Outside Diameter:320 mm

Width:80 mm

Weight:18.6 kg

Min. Order:1 Piece

The 24948-B-K30-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 24948-B-K30-MB-C4 bearing is a Spherical roller bearings With central rib tapered bore (K30 = taper 1:30) with an inner diameter of 240 mm , an outer diameter of 320 mm, a width of 80 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 779913 N, its static radial rated load is approximately 1699905 N. It uses C4 standard radial clearance, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

240 mm

Outside Diameter:

320 mm

Thickness:

80 mm

Weight:

18.6 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

779913 N

Static load Capacity, Radial (Cor):

1699905 N

Fatigue Load Limit, Radial:

161942 N

Limiting speed (Oil rpm):

1295

Specifications:

Old Designations:

24948BK30MBC4

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:

K30 = Tapered bore (K30 = taper 1:30)

Operating Temperature:

-30 to +200 °C

System of Measurement:

Metric

Series:

249..-B-K30-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

24948-B-K30-MB-C4 bearings ( 240 mm x 320 mm x 80 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	24948-B-K30-MB-C4
Design drawing	2
Design Type	B = with fixed central rib
Bore Type	K30 = Tapered bore (K30 = taper 1:30)
RIC	C4
Row	2
Bearing Type	Spherical roller bearings With central rib tapered bore (K30 = taper 1:30)
Manufacturer Part Code	24948BK30MBC4
Cage	MB = Solid brass cage, guided on inner ring
Measurement	Metric
d φ Inside [inch]	9.449
D Φ Outside [inch]	12.598
B Width [inch]	3.150
n_G Limiting speed (oil) [min^–1]	1295
Weight [kg]	18.6
r(min.) Chamfer [inch]	0.083
D₁ [inch]	11.587
d_s [inch]	0.189
n_s [inch]	0.374
C_r Radial Dynamic [lbf]	175324
C_0r Radial static [lbf]	382138
C_ur Radial Fatigue [lbf]	36404
Temperature - T(min)[°C]	-30
Temperature - T(max)[°C]	+200
Mounting dimensions
d_a(min.) [inch]	9.850
D_a(max.) [inch]	12.197
r_a(max.) [mm]	18.6
Calculation coefficient
e	0.23
Y₀	2.86
Y₁	2.92
Y₂	4.35

The 24948-B-K30-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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24948-B-K30-MB-C4 Spherical Roller Bearings With Central Rib Tapered Bore (K30 = Taper 1:30)

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