Double Row Ball Slew Rings

Double row ball slew rings are ideal in applications where a high moment load is to be supported, a degree of rigidity is required in the bearing system, or there are high radial loads.

Double Row Ball Slewing rings find application in a wide variety of applications such as scrap handling grab cranes, portal or jib cranes or deck handling apparatus.

Special wide gear face designs find application in high-torque winches where the gear forces rather than bearing loads dictate the overall design.

All QCB® double row bearings are manufactured in 42CrMo4 steel for superior gear strength and toughness in arduous operating conditions.

The standard stock units are listed in the dimensions tab. However we have drawings on file to 4500mm diameter (internal and external gear)

Matching pinions and either electric or hydraulic gearboxes can be specified and offered for a complete solution.

Some of our popular and stock sizes are listed below. We have other designs in stock or on file - don't hesitate to ask if you don't see what you need here

QCB referenceIDODHTInner bolts Outer bolts Gear
#/SizePCD#/SizePCDMod# Teeth
SEG 504 2 25 01 AA LM2995049216/Ø1733016/Ø17436861
SEG 610 2 20 01 AA LM3906109018/Ø1743618/Ø175406100
SEG 614 2 20 01 AA LM378614.49824/Ø1941024/Ø19540874
SEG 712 2 25 03 AA LM4707129836/Ø1750836/Ø17640887
SEG 816 2 25 01 AA LM57281611318/Ø2260418/Ø227536132
SEG 979 2 25 01 AA LM71697910236/Ø2175336/Ø218931094
SEG 1200 2 25 01 AA LM97612009836/Ø19101236/Ø1911358148
SEG 1289 2 30 01 AA LM9851289.511040/Ø21103540/Ø21119810125
SEG 1380 2 25 01 AA LM1095138010836/Ø23113536/Ø23129010136
SEG 1474 2 40 01 AA LM1085147414436/Ø28115036/Ø28135012

120

QCB referenceIDODHTInner bolts PCDOuter bolts PCDGear
#/Size#/SizeMod#Teeth
SIG 570 2 20 00 AA LM3685708418/Ø1743618/Ø17540848
SIG 700 2 25 01 AA LM48570010030/Ø2154028/Ø21660597
SIG 705 2 25 03 AA LM5047059232/Ø1757532/Ø17675865
SIG 712 2 25 03 AA LM4567129832/Ø1764032/Ø17675859
SIG 850 2 20 02 AA LM6418509236/Ø1770536/Ø17820881
SIG 976 2 20 01 AA LM7869769736/Ø1785036/Ø179448100
SIG 982 2 25 01 AA LM7549829736/Ø2182636/Ø21944895
SIG 1072 2 25 01 AA LM83110729736/Ø1992236/Ø1910351270
SIG 1200 2 25 01 AA LM963.5120011048/Ø21104048/Ø2111601098
SIG 1250 2 30 01 AA LM 998125011036/Ø21108036/Ø21120810100
SIG 1470 2 25 02 AA LM1182147010848/Ø23127048/Ø23142510120
SIG 1750 2 30 02 AA LM1419175012048/Ø25152548/Ø25170512120


QCB referenceIDODHTInner bolts Outer bolts
#/SizePCD#/SizePCD
SUN 504 2 25 01 AA LM3005049224-2/Ø1733024/Ø17436
SUN 520 2 25 01 AA LM29252011924/Ø2133924/Ø22476
SUN 577 2 20 01 AA LM37057712740/Ø1741040-2/Ø17540
SUN 683 2 25 01 AA LM4906839248/Ø1753748-2/Ø17651
SUN 692 2 25 01 AA LM46169211540/Ø1749240-2/Ø17660
SUN 979 2 25 01 AA LM71897910236/Ø2175336/Ø21893
SUN 1200 2 25 01 AA LM97612009836/Ø19101236/Ø191135



Material

All QCB® double row ball bearings are made in 42CrMo4 for superior gear strength. Other manufacturers may vary.


Interchange information

QCB® double row slewing rings are usually interchangeable with those from other manufacturers. However as so many simple variations exist please check with NBC Technical.

In the quest for continual product improvement these specifications may change without notice.


Need help?

For immediate and expert advice call us on 01952 222300 or e-mail slewingrings@nbcgroup.co.uk

Associated Products


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oemsales@nbcgroup.co.uk

01952 222300