Since ZZ Slewing Drives are highly compatible with IMO SP-H Series in terms of technical parameters, performance, environmental adaptability and cost-effectiveness, and may have advantages in certain aspects such as price and customization flexibility, they can be a perfect alternative to IMO SP-H Series.
Load Capacity and Output Torque: ZZ Slewing Drives offer axial and radial load capacities and output torque ranges that are generally consistent with or higher than the IMO SP-H series. For applications that require large loads, ZZ designs meet industrial-grade requirements and are capable of handling most heavy-duty scenarios.
Gear Ratio Range: ZZ Slewing Drives offer a variety of gear ratio options that match the range of the IMO SP-H series to meet precision control and power transmission needs.
Performance
Accuracy and Stability: ZZ Slewing Drives use high-precision manufacturing processes, and their backlash and rotational accuracy are comparable to the IMO SP-H series, suitable for applications that require high positioning accuracy (such as solar tracking and industrial automation equipment).
Life and Durability: ZZ is manufactured using high-quality materials (such as alloy steel or corrosion-resistant materials) to ensure that its life is comparable to the IMO SP-H series, and it has strong wear and fatigue resistance.
Working efficiency: ZZ has high transmission efficiency and can effectively transmit power, which is suitable for efficient operation scenarios.
Environmental adaptability
Protection level: ZZ Slewing Drives provide IP65 or higher protection level, can operate normally in dusty, humid or extreme temperature conditions, and fully adapt to the working environment requirements of IMO SP-H.
Working temperature range: ZZ’s products cover working environments from extremely cold to high temperatures (such as -40°C to +60°C), which is consistent with the adaptability of IMO SP-H and is suitable for outdoor and industrial environments.
Cost-effectiveness
Price advantage: ZZ Slewing Drives are generally more cost-effective than the IMO SP-H series, especially in large-volume purchases or projects with limited budgets, which can significantly reduce procurement costs.
| Part Number | Series | Number of drives | Drive style | Module | Number Of Teeth Pinion | Number Of Wheel Teeth | Weight | Slew Drive Gear Ratio | Overall Gear Raito Incl Gear Box | Max Torque | Nom Torques | Max Holding Torque |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SP-H 0455 | SP-H Series | 1 drive | Straight teeth | 8 | 15 | 72 | 207 Kg | 4.8 | 86.88 | 27673 Nm | 18115 Nm | 27673 |
| SP-H 0555 | SP-H Series | 1 drive | Straight teeth | 8 | 15 | 85 | 226 Kg | 5.67 | 102.56 | 32670 Nm | 21590 Nm | 32670 |
| SP-H 0655 | SP-H Series | 1 drive | Straight teeth | 8 | 15 | 98 | 246 Kg | 6.53 | 118.25 | 37667 Nm | 25048 Nm | 37667 |
| SP-H 0755 | SP-H Series | 1 drive | Straight teeth | 8 | 15 | 110 | 268 Kg | 7.33 | 132.72 | 42279 Nm | 28204 Nm | 42279 |
| SP-H 0855 | SP-H Series | 1 drive | Straight teeth | 8 | 15 | 122 | 289 Kg | 8.13 | 147.21 | 47180 Nm | 32749 Nm | 47180 |
| SP-H 0955 | SP-H Series | 1 drive | Straight teeth | 8 | 15 | 134 | 315 Kg | 8.93 | 161.69 | 51888 Nm | 36342 Nm | 51888 |
Expert Insights and Reliable Solutions to Your Most Common Questions.
ZZ Slewing Bearing supplies a full range of slewing bearings to meet different industrial needs:
Typical selection parameter for ZZ clients:
Load type: axial, radial, and tilting moment.
Rotation RPM: ensures long service life.
Installation space & mounting dimensions: inner/outer ring diameter, bolt circle.
Precision & rigidity requirements: critical for cranes, excavators, and robots.
ZZ engineers provide professional selection guidance according to your equipment and drawings.
ZZ Slewing Bearing selects materials for strength, wear resistance, and long-term durability:
Slewing ring: 42CrMo, 50Mn, C45N, 40CrNiMo, C48E.
Special forging spare parts: carburized/hardened steels for gear teeth (20CrMnTi, 18CrNiMo7‑6).
Corrosion resistant: SS 304, 316L, duplex stainless steel.
Surface treatments: heat treatment, quenching, carburizing, induction hardening, and surface coating(Four-Layer Packing, Strong Anti-Rust Oil, Black Oxide Treatment, Jet Black Paint Finish, Hot-Dip Galvanizing (CGL), Electro-Galvanizing (EGL), Hot-Dip Galvanizing + Paint Finish)
Correct installation with flat surfaces.
Proper lubrication using grease.
Avoid overloading or shock loads over capacity.
Monitor operating conditions regularly to prevent debris entry.
Typical factors observed by ZZ engineers:
In-stock: 3–7 days.
Custom: 2–6 weeks depending on size, load, and precision.
Warranty: 1 year
Lifetime Free Spare Parts: Glue, seals, steel ball
Yes — ZZ Slewing Bearing offers:
Detailed installation manuals.
Online engineering support.
Guidance for lubrication, maintenance, and troubleshooting solution.
Full range of materials and heat treatments for various load conditions.
High precision and strict quality inspection standards.
Engineering support before and after delivery.
Customization to exact equipment requirements.
Proven performance in cranes, excavators, robotics, wind turbines, and heavy machinery etc.
ZZ Slewing Bearing (Shanghai) Co., Ltd
Leading Slew Drive & Slewing Bearing Manufacturer in China.
ZZ products are applied globally in solar tracking systems, wind power systems, satellite communications, and numerous other globally connected industries.

