NN31 series-Shandong Changyou Bearing Co., Ltd.

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Single row cylindrical roller bearings

NU type

NU2 series

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NB type

NB type

Double row cylindrical roller bearings

NN type

NN30 series

NN39 series

NN49 series

NN31 series

NN40 series

NNU type

NNU49 series

NNU41 series

NNU30 series

NNU40 series

NNU31 series

Four row cylindrical roller bearings

FC type

FCD type

FCDP type

Full complement cylindrical roller bearings

Single row full complement cylindrical roller bearings

NCF18 V series (SL1818 series)

NCF22 V series (SL1822 series)

NCF28 V series (SL1828 series)

NCF29 V series (SL1829 series)

NCF30 V series (SL1830 series)

NJG23 V series (SL1923 series)

Unidirectional positioning double row full complement cylindrical roller bearings

NNCF48 series (SL1848 series)

NNCF49 series (SL1849 series)

NNCF50 series (SL1850 series)

Positioning double-row full complement cylindrical roller bearings

NNC48 series (SL0148 series)

NNC49 series (SL0149 series)

Unpositioning double row full complement cylindrical roller bearings

NNCL48 series (SL0248 series)

NNCL49 series (SL0249 series)

Double row full complement cylindrical roller bearings with double seals

NNF50 series (SL0450 series)

Multiple-row full complement cylindrical roller bearings

Multiple rows of fully loaded cylindrical roller bearings

Single row full complement cylindrical roller bearings without outer ring

RSL1822 series

RSL1823 series

RSL1830 series

Single row full complement cylindrical roller bearings without outer ring

RSL1850 series

Eccentric cylindrical roller bearings

Split cylindrical roller bearings

Split cylindrical roller bearings

Oilfield cylindrical roller bearings

Petromechanical bearings

NN31 series

‹ ›

Product Parameters

Bearing number

Cylindrical bore NN3144

Tapered bore NN3144K
Boundary dimensions mm

d 220

D 370

B 120

Ew 331

r_smin 4
Weight kg 51.9
Basic load ratings KN

C 1050

Co 1810
Shoulder and chamfer size mm

da⁽²⁾ 241

d_1a -

dc
min -

Da
max

r_a
max 3

CN EN

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