Tapered Roller Bearings 31311-A

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31311-A

Bore Diameter:55 mm

Outside Diameter:120 mm

Width:31.5 mm

Weight:1.57 kg

The 31311-A bearing is a Tapered Roller Bearings with an inner diameter of 55 mm , an outer diameter of 120 mm, a width of 31.5 mm. It typically uses ABEC-5 grade precision tolerances and Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

55 mm

Outside Diameter:

120 mm

Thickness:

31.5 mm

Weight:

1.57 KG

Specifications:

Structure:

tapered roller bearing

Precision Rating:

ABEC-5

Bearing Material:

Chrome Steel

Seals Type:

Open

Transaction Information:

Payment term:

Delivery time:

Stock

Detailed description

Item:Tapered Roller Bearing 31311-A

1)ISO 9001:2008 approved

2)long life and low noise

3)OEM service

4)stocks

Specifications

Material :GCr15/GCr15SiMn / G20Gr2Ni4A
Hardness :HRC60-HRC64
Closures :Unsealed/Sealed Grade : P5

Clearance :C0, C3, C4

Lubrication :Oil or grease
Features: These bearings are featured by the extremely big axial load carrying capacity and meanwhile they can also carry certain radial load

Packing :
1. For small ones: Anti-rust oil+ plastic bag+ paper box+ wooden box
2. For big ones: Anti-rust oil+ waterproof belt+ professional belt +wooden box

Application :Steel industry, oil industry, cement industry, mining & construction, papermaking machinery, rolling mill, sugar mill, vibrating screens, conveyors, air blower, transmissions, and other heavy machinery

Tapered roller bearings 31311-A
main dimensions to DIN ISO 355 / DIN 720, separable, adjusted or in pairs

55 mm

120 mm

31,5 mm

39 mm

29 mm

21 mm

C_{a min}

4 mm

C_{b min}

10,5 mm

D_{a max}

110 mm

D_{a min}

94 mm

D_{b min}

113 mm

d₁

88 mm

d_{a max}

68 mm

d_{b min}

65 mm

r_{1, 2 min}

2,5 mm

r_{3, 4 min}

2 mm

r_{a max}

2,5 mm

r_{b max}

2 mm

1,57 kg

Mass

C_r

123000 N

Basic dynamic load rating, radial

C_0r

139000 N

Basic static load rating, radial

0,83

0,73

Y₀

0,4

C_ur

16400 N

Fatigue limit load, radial

n_G

5900 1/min

Limiting speed

n_B

4100 1/min

Reference speed

T7FB055

Comparative designation to DIN ISO 355

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Tapered Roller Bearings 31311-A

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