81252M Axial Cylindrical Roller Bearings, Single Direction, Single Row, Brass Cage

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81252M

Bore Diameter:260 mm

Outside Diameter:360 mm

Width:79 mm

Weight:28.6 kg

Min. Order:1 Piece

The 81252M Cylindrical roller thrust bearings are specifically designed for applications requiring heavy axial loads and stringent positioning accuracy. Classic applications include heavy-duty vertical lathe tables, marine propeller shaft thrust devices, large gearboxes, wind turbine main gearboxes, rolling mill pressing mechanisms, and crane slewing bearings.

The 81252M bearing is a Axial cylindrical roller bearings, Single direction, Single row with an inner diameter of 260 mm , an outer diameter of 360 mm, a width of 79 mm. It typically uses PN (ABEC-1) grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. Its dynamic axial rated load is approximately 1438158 N, its static axial rated load is approximately 5394790 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Interchange code: 812 52 M

Dimensions:

Inside Diameter:

260 mm

Outside Diameter:

360 mm

Thickness:

79 mm

Weight:

28.6 KG

Dynamic load Capacity, axial:

1438158 N

Static load Capacity, axial:

5394790 N

Fatigue Load Limit, Axial:

474564 N

Reference speed (Grease rpm):

294

Limiting speed (Oil rpm):

904

Specifications:

Old Designations:

81252M

Structure:

Cylindrical Roller Thrust Bearings

Number of Rows:

One

Precision Rating:

PN (ABEC-1)

Bearing Material:

GCr15SiMn

Cage Type:

M = Brass cage

Rolling Mlement Material:

GCr15SiMn

Bore Type:

Cylindrical bore

Operating Temperature:

-30 to 150 °C

System of Measurement:

Metric

Series:

812 series (812..-M)

Rolling Element:

cylindrical rollers

Transaction Information:

Transport Package:

Standard Export Package

Service:

7*24 hour

Shipping Ways:

by Sea or Air

Country of Origin:

china

Stock:

200 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

81252M bearings ( 260 mm x 360 mm x 79 mm) have the advantages of extremely high axial load capacity, high rigidity, compact axial structure, and a detachable design for easy installation, and are therefore widely used in the Machine tool worktables, extruders, differentials, wind power equipment, and oil drilling machinery.

Part Number	81252M
Bearing Type	Axial cylindrical roller bearings, Single direction, Single row
Design	1
Equivalent	812 52 M
Series	812 series (812..-M)
Cage	M = Brass cage
Accuracy class	PN (ABEC-1)
Rows NO.	One
Axial cylindrical roller and cage assemblies	K81252-M
Housing locating washer	GS81252
Shaft locating washer	WS81252
Weight [lb]	63.0516
C_a Axial Dynamic [lbf]	323297
C_0a Axial static [lbf]	1212748
C_ua Axial Fatigue [lbf]	106681
n_B Speed ratings (grease) [rpm]	294
n_G Speed ratings (oil) [rpm]	904
d φ Inside [inch]	10.2362
D Φ Outside [inch]	14.1732
T Thickness [inch]	3.1102
B Width [inch]	0.9252
D₁ [inch]	10.3937
d₁ [inch]	13.9764
r(min.) [inch]	0.0827
Mounting dimensions
d_a [inch]	13.8976
D_a(max.) [inch]	11.0236
r_a(max.) [inch]	0.0827

The 81252M Cylindrical roller thrust bearings mainly consist of a shaft ring, a housing ring, cylindrical rollers, and a cage assembly. The rollers are arranged radially, forming a line contact load-bearing structure.

The advantages of cylindrical roller thrust bearings include extremely high axial load capacity, excellent rigidity, and a low coefficient of friction. Optimized roller end faces and flanges can accommodate slight eccentricity and impact loads, while also featuring a compact structure and high rotational accuracy.

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81252M Axial Cylindrical Roller Bearings, Single Direction, Single Row, Brass Cage

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