81280-M Axial Cylindrical Roller Bearings, Single Direction, Single Row, Brass Cage

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81280-M

Bore Diameter:400 mm

Outside Diameter:540 mm

Width:112 mm

Weight:79.4 kg

Min. Order:1 Piece

The 81280-M 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 81280-M bearing is a Axial cylindrical roller bearings, Single direction, Single row with an inner diameter of 400 mm , an outer diameter of 540 mm, a width of 112 mm. It typically uses PN (ABEC-1) grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. Its dynamic axial rated load is approximately 2799533 N, its static axial rated load is approximately 11499577 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Interchange code: 812 80 M

Dimensions:

Inside Diameter:

400 mm

Outside Diameter:

540 mm

Thickness:

112 mm

Weight:

79.4 KG

Dynamic load Capacity, axial:

2799533 N

Static load Capacity, axial:

11499577 N

Fatigue Load Limit, Axial:

909156 N

Reference speed (Grease rpm):

181

Limiting speed (Oil rpm):

590

Specifications:

Old Designations:

81280M

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

81280-M bearings ( 400 mm x 540 mm x 112 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	81280-M
Bearing Type	Axial cylindrical roller bearings, Single direction, Single row
Design	1
Equivalent	812 80 M
Series	812 series (812..-M)
Cage	M = Brass cage
Accuracy class	PN (ABEC-1)
Rows NO.	One
Axial cylindrical roller and cage assemblies	K81280-M
Housing locating washer	GS81280
Shaft locating washer	WS81280
Weight [lb]	175.0452
C_a Axial Dynamic [lbf]	629335
C_0a Axial static [lbf]	2585104
C_ua Axial Fatigue [lbf]	204378
n_B Speed ratings (grease) [rpm]	181
n_G Speed ratings (oil) [rpm]	590
d φ Inside [inch]	15.7480
D Φ Outside [inch]	21.2598
T Thickness [inch]	4.4094
B Width [inch]	1.3189
D₁ [inch]	15.9449
d₁ [inch]	21.0630
r(min.) [inch]	0.1575
Mounting dimensions
d_a [inch]	20.9055
D_a(max.) [inch]	17.0472
r_a(max.) [inch]	0.1575

The 81280-M 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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81280-M Axial Cylindrical Roller Bearings, Single Direction, Single Row, Brass Cage

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