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Slewing Bearings

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Crane Slewing Bearing
Crane Slewing Bearing Crane Slewing Bearing

Crane Slewing Bearing

Crane slewing bearings serve as critical rotating components in heavy-duty lifting equipment, such as tower cranes, truck cranes, and crawler cranes. By connecting the slewing bearing to the crane's rotating structure, they enable the equipment to execute full 360-degree rotational movements while simultaneously withstanding axial forces, radial forces, and overturning moments.

ItemSpecification / Material
Outer Diameter Range300 mm ～ 15,000 mm
Ring Material42CrMo / 50Mn / C45
Ball / Roller MaterialGCr15
Cage Material20 Steel or ZL102 Cast Aluminum Alloy
Spacer MaterialNylon 6 / Nylon 66
Raceway HardnessHRC 55 – 62
Gear TypeGearless, Internal Gear, External Gear
Delivery Time10 – 30 Days


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Brochure

Crane Slewing Bearing

What is a slewing ring on a crane?

The slewing bearing on a crane serves to connect the upper and lower crane bodies and constitutes a core component of the machine. When hoisting loads, it facilitates 360-degree rotation while simultaneously withstanding various complex loads, thereby accommodating radial or tilting movements.

Structure of Crane Slewing Bearings

Inner Ring / Outer Ring: High-strength alloy steel, featuring mounting flange holes.

Rolling Elements: Steel balls or cylindrical rollers, rolling within the raceways.

Cage / Spacer: Separates the rolling elements to prevent collision.

Sealing Device: Provides protection against dust and water, and retains lubricant.

Gear Ring: Integrated into the inner or outer ring for drive engagement.

What types of slewing bearings are used in cranes?

Single-Row Four-Point Contact Ball Type: Features a single row of rolling balls that establish four points of contact with the raceway; it is a lightweight slewing bearing. Characterized by a compact structure and low cost, it is typically suitable for truck cranes or tower cranes subject to light to moderate loads.

Double-Row Different-Diameter Ball Type: Features two rows of steel balls of differing diameters, allowing for rational load distribution and high load-bearing capacity. It is frequently utilized in cranes and truck cranes subject to moderate loads.

Two rows of steel balls with different diameters provide enhanced load-bearing strength.

Single-Row Crossed Roller Type: The rollers are arranged in a 90-degree crossed configuration, establishing linear contact with the raceway. This design offers a large contact area, high rigidity, and excellent precision. It is suitable for heavy-duty port gantry cranes and precision lifting equipment.

Three-Row Roller Type: Features three rows of rollers, each designed to bear specific types of loads. It represents the slewing bearing with the highest load-bearing capacity among all types, finding application in large-tonnage crawler cranes and all-terrain cranes.

Advantages of LTZC Crane Bearing Solutions

As a leading Chinese manufacturer of slewing bearings, LTZC offers solutions for the crane industry that stand out not only for the superior performance of the products themselves but also for the comprehensive services provided to customers. These solutions directly address critical pain points faced by clients regarding heavy-load capacity, operational stability, and service life.

1. High Load-Bearing Capacity for Heavy-Duty Applications

For cranes—such as crawler cranes, tower cranes, and port cranes—the core requirements for bearings are robust load-bearing capacity combined with safety and reliability. LTZC specializes in the manufacture of ultra-heavy and heavy-duty slewing bearings, leveraging extensive manufacturing expertise and technical know-how to effectively prevent bearing deformation or failure caused by heavy loads during lifting operations.

2. High Stability and Impact Resistance

During the startup, braking, and luffing processes of lifting equipment, intense impact loads are generated. Through optimized bearing structural designs and advanced manufacturing processes, LTZC effectively prevents bearing cracking and spalling, thereby enhancing overall equipment safety.

3. Designed for Ultra-Long Service Life

High maintenance costs associated with equipment downtime are a major concern for customers. Furthermore, cranes often operate in harsh environments characterized by severe corrosion and high dust levels. To address this, we provide customers with specialized sealing and lubrication designs that extend the duration of stable operation in extreme conditions, resulting in a service life that is 30% to 50% longer than that of standard bearings.

4. Direct Factory Supply + Cost Advantages

Compared to European and American brands, LTZC offers superior price competitiveness. As a leading integrated manufacturer and trading company in China's bearing industry, LTZC maintains strict control over lead times and offers global customers requiring slewing bearings premium value at competitive prices, thereby enhancing project profit margins.

5. Comprehensive Technical Support and After-Sales Service

LTZC goes beyond merely manufacturing and selling slewing bearings; we provide complete solutions. We offer customers a full spectrum of services, including bearing installation guidance, failure analysis, and solutions for replacing imported bearing brands.

Crane Slewing Bearing Catalog

Bearing Model Dimensions Mounting Dimensions Structural Dimension Gear data Weight
Dmm dmm Hmm D1mm D2mm n omm dmmm Lmm n1 D3mm d1mm H1mm hmm bmm x Mmm Demm z
113.25.500 602 398 75 566 434 20 18 M16 32 4 498 502 65 10 60 0.5 5 367 74 80
113.25.560 662 458 75 626 494 20 18 M16 32 4 558 562 65 10 60 0.5 5 427 86 90
113.25.630 732 528 75 696 564 24 18 M16 32 4 628 632 65 10 60 0.5 6 494.4 83 100
113.25.710 812 608 75 776 644 24 18 M16 32 4 708 712 65 10 60 0.5 6 572.4 96 110
113.28.800 922 678 82 878 722 30 22 M20 40 6 798 802 72 10 65 0.5 8 635.2 80 170
113.28.900 1022 778 82 978 822 30 22 M20 40 6 898 902 72 10 65 0.5 8 739.2 93 190
113.28.1000 1122 878 82 1078 922 36 22 M20 40 6 998 1002 72 10 65 0.5 10 824 83 210
113.28.1120 1242 998 82 1198 1042 36 22 M20 40 6 1118 1122 72 10 65 0.5 10 944 95 230
113.32.1250 1390 1110 91 1337 1163 40 26 M24 48 5 1248 1252 81 10 75 0.5 12 1048.8 88 350
113.32.1400 1540 1260 91 1487 1313 40 26 M24 48 5 1398 1402 81 10 75 0.5 12 1192.8 100 400
113.32.1600 1740 1460 91 1687 1513 45 26 M24 48 5 1598 1602 81 10 75 0.5 14 1391.6 100 440
113.32.1800 1940 1660 91 1887 1713 45 26 M24 48 5 1798 1802 81 10 75 0.5 14 1573.6 113 500
113.40.2000 2178 1825 112 2110 1891 48 33 M30 60 8 1997 2003 100 12 90 0.5 16 1734.4 109 900
113.40.2240 2418 2065 112 2350 2131 48 33 M30 60 8 2237 2243 100 12 90 0.5 16 1990.4 125 1000
113.40.2500 2678 2325 112 2610 2391 56 33 M30 60 8 2497 2503 100 12 90 0.5 18 2239.2 125 1100
113.40.2800 2978 2625 112 2910 2691 56 33 M30 60 8 2797 2803 100 12 90 0.5 18 2527.2 141 1250
113.50.3150 3376 2922 134 3286 3014 56 45 M42 84 8 3147 3153 122 12 110 0.5 20 2628 14 2150
113.50.3550 3776 3322 134 3686 3414 56 45 M42 84 8 3547 3553 122 12 110 0.5 20 3228 162 2470
113.50.4000 4226 3772 134 4136 3864 60 45 M42 84 10 3997 4003 122 12 110 0.5 22 3660.8 16 2800
113.50.4500 4726 4272 134 4636 4364 60 45 M42 84 10 4497 4503 122 12 110 0.5 22 4166.8 190 3100

Crane Slewing Bearing Catalog

Bearing Model Dimensions Mounting Dimensions Structural Dimension Gear data weight
Dmm dmm Hmm D1mm D2mm n omm dmmm Lmm n1 D3mm d1mm H1mm hmm bmm x Mmm Demm z
113.25.500 602 398 75 566 434 20 18 M16 32 4 498 502 65 10 60 0.5 5 367 74 80
113.25.560 662 458 75 626 494 20 18 M16 32 4 558 562 65 10 60 0.5 5 427 86 90
113.25.630 732 528 75 696 564 24 18 M16 32 4 628 632 65 10 60 0.5 6 494.4 83 100
113.25.710 812 608 75 776 644 24 18 M16 32 4 708 712 65 10 60 0.5 6 572.4 96 110
113.28.800 922 678 82 878 722 30 22 M20 40 6 798 802 72 10 65 0.5 8 635.2 80 170
113.28.900 1022 778 82 978 822 30 22 M20 40 6 898 902 72 10 65 0.5 8 739.2 93 190
113.28.1000 1122 878 82 1078 922 36 22 M20 40 6 998 1002 72 10 65 0.5 10 824 83 210
113.28.1120 1242 998 82 1198 1042 36 22 M20 40 6 1118 1122 72 10 65 0.5 10 944 95 230
113.32.1250 1390 1110 91 1337 1163 40 26 M24 48 5 1248 1252 81 10 75 0.5 12 1048.8 88 350
113.32.1400 1540 1260 91 1487 1313 40 26 M24 48 5 1398 1402 81 10 75 0.5 12 1192.8 100 400
113.32.1600 1740 1460 91 1687 1513 45 26 M24 48 5 1598 1602 81 10 75 0.5 14 1391.6 100 440
113.32.1800 1940 1660 91 1887 1713 45 26 M24 48 5 1798 1802 81 10 75 0.5 14 1573.6 113 500
113.40.2000 2178 1825 112 2110 1891 48 33 M30 60 8 1997 2003 100 12 90 0.5 16 1734.4 109 900
113.40.2240 2418 2065 112 2350 2131 48 33 M30 60 8 2237 2243 100 12 90 0.5 16 1990.4 125 1000
113.40.2500 2678 2325 112 2610 2391 56 33 M30 60 8 2497 2503 100 12 90 0.5 18 2239.2 125 1100
113.40.2800 2978 2625 112 2910 2691 56 33 M30 60 8 2797 2803 100 12 90 0.5 18 2527.2 141 1250
113.50.3150 3376 2922 134 3286 3014 56 45 M42 84 8 3147 3153 122 12 110 0.5 20 2628 14 2150
113.50.3550 3776 3322 134 3686 3414 56 45 M42 84 8 3547 3553 122 12 110 0.5 20 3228 162 2470
113.50.4000 4226 3772 134 4136 3864 60 45 M42 84 10 3997 4003 122 12 110 0.5 22 3660.8 16 2800
113.50.4500 4726 4272 134 4636 4364 60 45 M42 84 10 4497 4503 122 12 110 0.5 22 4166.8 190 3100
114.50.4500 4726 4272 134
 4636 4364 60 45 M42 84 10 4497 4503 122 12 110 0.5 25 4160 167
 3100

 Crane Slewing Bearing Catalog

Bearing Model Dimensions Mounting Dimensions Structural Dimension Gear data Weight
Dmm dmm Hmm D1mm D2mm n omm dmmm Lmm n1 D3mm d1mm H1mm hmm bmm x Mmm Demm z
131.25.500 634 366 148 598 402 24 18 M16 32 537 526 4 138 32 80 0.5 5 664 130 224
131.25.560 694 426 148 658 462 24 18 M16 32 597 586 4 138 32 80 0.5 5 724 142 240
131.25.630 764 496 148 728 532 28 18 M16 32 667 656 4 138 32 80 0.5 6 808.8 132 270
131.25.710 844 576 148 808 612 28 18 M16 32 747 736 4 138 32 80 0.5 6 886.8 145 300
131.32.800 964 636 182 920 680 36 22 M20 40 841 830 4 172 40 120 0.5 8 1006.4 123 500
131.32.900 1064 736 182 1020 780 36 22 M20 40 941 930 4 172 40 120 0.5 8 1102.4 135 600
131.32.1000 1164 836 182 1120 880 40 22 M20 40 1041 1030 5 172 40 120 0.5 10 1218 119 680
131.32.1120 1284 956 182 1240 1000 40 22 M20 40 1161 1150 5 172 40 120 0.5 10 1338 131 820
131.40.1250 1445 1055 220 1393 1107 45 26 M24 48 1300 1287 5 210 50 150 0.5 12 1506 123 1200
131.40.1400 1595 1205 220 1543 1257 45 26 M24 48 1450 1437 5 210 50 150 0.5 12 1665.6 136 1300
131.40.1600 1795 1405 220 1743 1457 48 26 M24 48 1650 1637 6 210 50 150 0.5 14 1873.2 131 1520
131.40.1800 1995 1605 220 1943 1657 48 26 M24 48 1850 1837 6 210 50 150 0.5 14 2069.2 145 1750
131.45.2000 2221 1779 231 2155 1845 60 33 M30 60 2055 2033 6 219 54 160 0.5 16 2300.8 141 2400
131.45.2240 2461 2019 231 2395 2085 60 33 M30 60 2295 2273 6 219 54 160 0.5 16 2556.8 157 2700
131.45.2500 2721 2279 231 2655 2345 72 33 M30 60 2555 2533 8 219 54 160 0.5 18 2822.4 154 3000
131.45.2800 3021 2579 231 2955 2645 72 33 M30 60 2855 2833 8 219 54 160 0.5 18 3110.4 170 3400
131.50.3150 3432 2868 270 3342 2958 72 45 M42 84 3213 3196 8 258 65 180 0.5 20 3536 174 50000
131.50.3550 3832 3268 270 3742 3358 72 45 M42 84 3613 3596 8 258 65 180 0.5 22 3936 194 5680
131.50.4000 4282 3718 270 4192 3808 80 45 M42 84 4063 4046 8 258 65 180 0.5 22 4395.6 197 6470
131.50.4500 4782 4218 270 4692 4308 80 45 M42 84 4563 4546 8 258 65 180 0.5 22 4901.6 220 7320

 Crane Slewing Bearing Catalog

Bearing Model Dimensions Mounting Dimensions Structural Dimension Gear data Weight
Dmm dmm Hmm D1mm D2mm n omm dmmm Lmm n1 D3mm d1mm H1mm hmm bmm x Mmm Demm z
133.25.500 634 366 148 598 402 24 18 M16 32 474 463 4 0 32 80 0.5 5 337 68 224
133.25.560 694 426 148 658 462 24 18 M16 32 534 523 1 10 32 80 0.5 5 397 80 240
133.25.630 764 496 148 728 532 28 18 M16 32 604 593 4 10 32 80 0.5 6 458.4 77 270
133.25.710 844 576 148 808 612 28 18 M16 32 684 673 4 10 32 80 0.5 6 536.4 90 300
133.32.800 964 636 182 920 680 36 22 M20 40 770 759 4 10 40 120 0.5 8 595.2 75 500
133.32.900 1064 736 182 1020 780 36 22 M20 40 870 859 4 10 40 120 0.5 8 691.2 87 600
133.32.100 1164 836 182 1120 880 40 22 M20 40 970 959 5 10 40 120 0.5 10 784 79 680
133.32.112 1284 956 182 1240 1000 40 22 M20 40 1090 1079 5 10 40 120 0.5 10 904 91 820
133.40.125 1445 1055 220 1393 1107 45 26 M24 48 1213 100 5 10 50 150 0.5 12 988.8 83 1200
133.40.140 1595 1205 220 1543 1257 45 26 M24 48 1363 1350 5 10 50 150 0.5 12 1145 96 1300
133.40.160 1795 1405 220 1743 1457 48 26 M24 48 1563 1550 6 10 50 150 0.5 14 1336 96 1520
133.40.180 1995 1605 220 1943 1657 48 26 M24 48 1763 1750 6 10 50 150 0.5 14 1532 110 1750
133.45.200 2221 1779 231 2155 1845 60 33 M30 60 1967 1945 6 12 54 160 0.5 16 1702 107 2400
133.45.224 2461 2019 231 2395 2085 60 33 M30 60 2207 2185 6 12 54 160 0.5 16 1926 121 2700
133.45.250 2721 2279 231 2655 2345 72 33 M30 60 2467 2445 8 12 54 160 0.5 18 2185 12 3000
133.45.280 3021 2579 231 2955 2645 72 33 M30 60 2767 2745 8 12 54 160 0.5 18 2491 139 3400
133.50.315 3432 2868 270 3342 2958 72 45 M42 84 3104 3090 8 12 65 180 0.5 20 2768 139 5000
131.50.355 3832 3268 270 3742 3358 72 45 M42 84 3504 3490 8 258 65 180 0.5 20 3168 159 5680
131.50.400 4282 3718 270 4192 3808 80 45 M42 84 3954 3940 8 258 65 180 0.5 22 311 165 6470
131.50.450 4782 4218 270 4692 4308 80 45 M42 84 4454 4440 8 258 65 180 0.5 22 4123 188 7320

  Crane Slewing Bearing Catalog

Bearing Model Dimensions Mounting Dimensions Structural Dimension Weight (kg)
Dmm dmm Hmm D1mm D2mm n mm dmmm Lmm nl D3mm d1mm H1mm hmm
130.25.500 634 366 148 598 402 24 18 M16 32 474 463 4 10 32 224
130.25.560 694 426 148 658 462 24 18 M16 32 534 523 4 10 32 240
130.25.630 764 496 148 728 532 28 18 M16 32 604 593 4 10 32 270
130.25.710 844 576 148 808 612 28 18 M16 32 684 673 4 10 32 300
130.32.800 964 636 182 920 680 36 22 M20 40 770 759 4 10 40 500
130.32.900 1064 736 182 1020 780 36 22 M20 40 870 859 4 10 40 600
130.32.1000 1164 836 182 1120 880 40 22 M20 40 970 959 5 10 40 680
130.32.1120 1284 956 182 1240 1000 40 22 M20 40 1090 1079 5 10 40 820
130.40.1250 1445 1055 220 1393 1107 45 26 M24 48 1213 1200 5 10 50 1200
130.40.1400 1595 1205 220 1543 1257 45 26 M24 48 1363 1350 5 10 50 1300
130.40.1600 1795 1405 220 1743 1457 48 26 M24 48 1563 1550 6 10 50 1520
130.40.1800 1995 1605 220 1943 1657 48 26 M24 48 1763 1750 6 10 50 1750
130.45.2000 2221 1779 231 2155 1845 60 33 M30 60 1967 1945 6 12 54 2400
130.45.2240 2461 2019 231 2395 2085 60 33 M30 60 2207 2185 6 12 54 2700
130.45.2500 2721 2279 231 2655 2345 72 33 M30 60 2467 2445 8 12 54 3000
130.45.2800 3021 2579 231 2955 2645 72 33 M30 60 2767 2745 8 12 54 3400
130.50.3150 3432 2868 270 3342 2958 72 45 M42 84 3104 3090 8 12 65 5000
130.50.3550 3832 3268 270 3742 3358 72 45 M42 84 3504 3490 8 258 65 5680
130.50.4000 4282 3718 270 4192 3808 80 45 M42 84 3954 3940 8 258 65 6470
130.50.4500 4782 4218 270 4692 4308 80 45 M42 84 4454 4440 8 258 65 7320

Why choose LTZC bearings？

A Trusted Brand

With over 20 years of experience in bearing R&D, our global service network covers countries such as India and Russia, ensuring fast and efficient technical support for all bearing issues and ensuring the smooth operation of your equipment.

High-Quality Bearings

Advanced CNC production equipment and manufacturing processes guarantee bearing precision and durability. LTZC bearings also carry third-party testing reports to ensure they meet international standards.


Product Range

LTZC products include slewing bearings, slewing drives, precision thin-wall bearings, and custom bearings. They are widely used in cranes, heavy machinery, and port machinery, maintaining stable performance under harsh operating conditions.

Custom Bearings

Our experienced technical team provides customized bearing solutions for complex applications. Services include load analysis and bearing selection, service life calculations, 3D design, and engineering drawings.


LTZC slewing bearing manufacturer

LTZC Bearings is a trusted bearing manufacturer specializing in slewing bearings, slewing drives, and precision bearings. With advanced CNC machining equipment, comprehensive heat treatment, and strict quality control, our products meet international standards and are ISO certified.

We export high-quality industrial bearings to Germany, India, Russia, and Canada, earning over 10,000 satisfied customer feedbacks. With strong OEM and ODM capabilities, LTZC provides fast delivery and custom bearing solutions for heavy machinery, construction, and automation industries.

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Technology support

Pre-sales service

After-sales service

Installation & maintenance

Selection guide

Customized bearing solutions

Customized bearing solutions

LTZC is a professional slewing bearing manufacturer，providing a full range of custom bearing services, including slewing rings, non-standard bearings, large bearings, thin-section bearings, crossed roller bearings, and four-point contact ball bearings. Whether the requirements are special sizes, materials, or complex operating conditions, we can provide customers with the optimal solution through professional R&D and precision manufacturing.

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