81144-M Axial Cylindrical Roller Bearings, Single Direction, Brass Cage

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81144-M

Bore Diameter:220 mm

Outside Diameter:270 mm

Width:37 mm

Weight:5.22 kg

Min. Order:1 Piece

The 81144-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 81144-M bearing is a Axial cylindrical roller bearings, Single row, single direction with an inner diameter of 220 mm , an outer diameter of 270 mm, a width of 37 mm. It typically uses PN (ABEC-1) grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. Its dynamic axial rated load is approximately 418930 N, its static axial rated load is approximately 1729018 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

220 mm

Outside Diameter:

270 mm

Thickness:

37 mm

Weight:

5.22 KG

Dynamic load Capacity, axial:

418930 N

Static load Capacity, axial:

1729018 N

Fatigue Load Limit, Axial:

133504 N

Reference speed (Grease rpm):

462

Limiting speed (Oil rpm):

1154

Specifications:

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:

-20 to 120 °C

System of Measurement:

Metric

Series:

811 series (811..-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

81144-M bearings ( 220 mm x 270 mm x 37 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	81144-M
Bearing Type	Axial cylindrical roller bearings, Single row, single direction
Equivalent	811 44 M , 81144MPB
Series	811 series (811..-M)
Cage	M = Brass Cage
Accuracy class	PN (ABEC-1)
Rows NO.	One
Axial cylindrical roller and cage assemblies	K81144-M
Housing locating washer	GS81144
Shaft locating washer	WS81144
Weight [lb]	11.5080
C_a Axial Dynamic [lbf]	94175
C_0a Axial static [lbf]	388683
C_ua Axial Fatigue [lbf]	30011
n_B Speed ratings (grease) [rpm]	462
n_G Speed ratings (oil) [rpm]	1154
d φ Inside [inch]	8.6614
D Φ Outside [inch]	10.6299
T Thickness [inch]	1.4567
D₁ [inch]	8.7795
d₁ [inch]	10.5118
r(min.) [inch]	0.0433
Mounting dimensions
d_a [inch]	10.3543
D_a(max.) [inch]	8.8976
r_a(max.) [inch]	0.0433

The 81144-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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81144-M Axial Cylindrical Roller Bearings, Single Direction, Brass Cage

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