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.
- Overview
- Dimensions
- Technical
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 reference | ID | OD | HT | Inner bolts | Outer bolts | Gear | |||
#/Size | PCD | #/Size | PCD | Mod | # Teeth | ||||
SEG 504 2 25 01 AA LM | 299 | 504 | 92 | 16/Ø17 | 330 | 16/Ø17 | 436 | 8 | 61 |
SEG 610 2 20 01 AA LM | 390 | 610 | 90 | 18/Ø17 | 436 | 18/Ø17 | 540 | 6 | 100 |
SEG 614 2 20 01 AA LM | 378 | 614.4 | 98 | 24/Ø19 | 410 | 24/Ø19 | 540 | 8 | 74 |
SEG 712 2 25 03 AA LM | 470 | 712 | 98 | 36/Ø17 | 508 | 36/Ø17 | 640 | 8 | 87 |
SEG 816 2 25 01 AA LM | 572 | 816 | 113 | 36/Ø22 | 604 | 36/Ø22 | 753 | 6 | 132 |
SEG 979 2 25 01 AA LM | 716 | 979 | 102 | 36/Ø21 | 753 | 36/Ø21 | 893 | 10 | 94 |
SEG 1200 2 25 01 AA LM | 976 | 1200 | 98 | 36/Ø19 | 1012 | 36/Ø19 | 1135 | 8 | 148 |
SEG 1289 2 30 01 AA LM | 985 | 1289.5 | 110 | 40/Ø21 | 1035 | 40/Ø21 | 1198 | 10 | 125 |
SEG 1380 2 25 01 AA LM | 1095 | 1380 | 108 | 36/Ø23 | 1135 | 36/Ø23 | 1290 | 10 | 136 |
SEG 1474 2 40 01 AA LM | 1085 | 1474 | 144 | 36/Ø28 | 1150 | 36/Ø28 | 1350 | 12 | 120 |
QCB reference | ID | OD | HT | Inner bolts | PCD | Outer bolts | PCD | Gear | |
#/Size | #/Size | Mod | #Teeth | ||||||
SIG 570 2 20 00 AA LM | 368 | 570 | 84 | 18/Ø17 | 436 | 18/Ø17 | 540 | 8 | 48 |
SIG 700 2 25 01 AA LM | 485 | 700 | 100 | 30/Ø21 | 540 | 28/Ø21 | 660 | 5 | 97 |
SIG 705 2 20 01 AA LM | 504 | 705 | 92 | 32/Ø17 | 575 | 32/Ø17 | 675 | 8 | 65 |
SIG 712 2 25 03 AA LM | 456 | 712 | 98 | 32/Ø17 | 640 | 32/Ø17 | 675 | 8 | 59 |
SIG 850 2 20 02 AA LM | 641 | 850 | 92 | 36/Ø17 | 705 | 36/Ø17 | 820 | 8 | 81 |
SIG 976 2 20 01 AA LM | 786 | 976 | 97 | 36/Ø17 | 850 | 36/Ø17 | 944 | 8 | 100 |
SIG 982 2 25 01 AA LM | 754 | 982 | 97 | 36/Ø21 | 826 | 36/Ø21 | 944 | 8 | 95 |
SIG 1072 2 25 01 AA LM | 831 | 1072 | 97 | 36/Ø19 | 922 | 36/Ø19 | 1035 | 12 | 70 |
SIG 1200 2 25 01 AA LM | 963.5 | 1200 | 110 | 48/Ø21 | 1040 | 48/Ø21 | 1160 | 10 | 98 |
SIG 1250 2 30 01 AA LM | 998 | 1250 | 110 | 36/Ø21 | 1080 | 36/Ø21 | 1208 | 10 | 100 |
SIG 1470 2 25 02 AA LM | 1182 | 1470 | 108 | 48/Ø23 | 1270 | 48/Ø23 | 1425 | 10 | 120 |
SIG 1750 2 30 02 AA LM | 1419 | 1750 | 120 | 48/Ø25 | 1525 | 48/Ø25 | 1705 | 12 | 120 |
QCB reference | ID | OD | HT | Inner bolts | Outer bolts | ||
#/Size | PCD | #/Size | PCD | ||||
SUN 504 2 25 01 AA LM | 300 | 504 | 92 | 24-2/Ø17 | 330 | 24/Ø17 | 436 |
SUN 520 2 25 01 AA LM | 292 | 520 | 119 | 24/Ø21 | 339 | 24/Ø22 | 476 |
SUN 577 2 20 01 AA LM | 370 | 577 | 127 | 40/Ø17 | 410 | 40-2/Ø17 | 540 |
SUN 683 2 25 01 AA LM | 490 | 683 | 92 | 48/Ø17 | 537 | 48-2/Ø17 | 651 |
SUN 692 2 25 01 AA LM | 461 | 692 | 115 | 40/Ø17 | 492 | 40-2/Ø17 | 660 |
SUN 979 2 25 01 AA LM | 718 | 979 | 102 | 36/Ø21 | 753 | 36/Ø21 | 893 |
SUN 1200 2 25 01 AA LM | 976 | 1200 | 98 | 36/Ø19 | 1012 | 36/Ø19 | 1135 |
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