More Than a Supplier — Your Reliable Bearing Partner.
More Than a Supplier — Your Reliable Bearing Partner.
Gonuo SI series rod end bearing is a high-load metric female rod end bearing designed for industrial linkage systems, hydraulic equipment and heavy machinery applications. Featuring LH/RH internal threads and a radial spherical plain bearing structure, it provides reliable connection, smooth angular movement and excellent load capacity.
The SI..E rod end bearing and SI..ES rod end bearing adopt a durable steel steel rod end bearing structure with zinc-plated medium carbon steel body for corrosion resistance. The SI..ES type includes lubrication holes or grease nipples, making it an ideal maintenance rod end bearing solution for applications requiring regular servicing and long-term operation.
The SI..E (S)/SI..ES 2RS Series is a maintenance-required rod end bearing with internal threads (left-hand or right-hand available). It consists of a rod end body and a radial spherical plain bearing (GE..E (S)/GE..ES 2RS). The rod end body is made of medium carbon steel with environmentally friendly zinc plating. It adopts a steel/steel sliding pair; both the ball and outer ring are made of heat-treated bearing steel (hardness HRC 54-60) with phosphating treatment. ES models are equipped with lubrication holes/grease nipples for regular grease injection. For specifications with d≥15, the optional 2RS double-seal structure effectively prevents dust and moisture ingress. Specifically designed for high-load, regularly maintainable internal linkage scenarios in equipment, it offers strong load-bearing capacity and compatibility with a wide range of metric sizes, serving as a core connector for internal linkages in heavy machinery.
Core Advantages
1. Steel/Steel Structure for High Load Performance
The steel steel rod end bearing design provides excellent wear resistance, impact resistance and load capacity, ensuring stable operation in demanding industrial environments.
2. Maintenance-Friendly Lubrication Design
The SI..ES rod end bearing features lubrication holes or grease nipples, allowing regular grease maintenance to reduce friction and extend service life.
3. Precision Internal Thread Connection
The metric female rod end bearing uses accurate LH/RH internal threads for secure installation and reliable connection with equipment linkage systems.
4. Optional 2RS Sealing Protection
The sealed version helps prevent dust and moisture contamination, improving durability in outdoor and harsh working conditions.
5. Corrosion-Resistant Surface Treatment
The SI series rod end bearing adopts zinc plating and surface protection treatment to enhance rust resistance and service reliability.
Sliding Contact Pair: | Steel/Steel |
Rod End Body Material: | Medium Carbon Steel,Environmental Zinc Plated |
Outer Ring Material: | Bearing Steel,Heat Treatment |
Ball: | Bearing Steel,Heat Treatment |
| Bearing number | Dimensions | kN LoadRatings | g Weight | ||||||||||||||
| d | d₃ 6H | B | C1 | L3 min | W | d2 | h1 | L4 | L5 | d4 | d₅ | dk | α ≈ | Dynamic | Static | ||
| SI 6E* | 6 | M6×1.0 | 6 | 4.4 | 11 | 11 | 21 | 30 | 40.5 | 5 | 10 | 13 | 10 | 13 | 3.40 | 8.15 | 21 |
| SI 8E* | 8 | M8×1.25 | 8 | 6.0 | 15 | 14 | 24 | 36 | 48 | 5 | 12.5 | 16 | 13 | 15 | 5.50 | 12.9 | 39 |
| SI 10 E* | 10 | M10×1.5 | 9 | 7.0 | 20 | 17 | 29 | 43 | 57.5 | 6.5 | 15 | 19 | 16 | 12 | 8.15 | 17.6 | 61 |
| SI 12 E* | 12 | M12×1.75 | 10 | 8.0 | 23 | 19 | 34 | 50 | 67 | 6.5 | 17.5 | 22 | 18 | 11 | 10.8 | 24.5 | 96 |
| SI 15 ES | 15 | M14×2.0 | 12 | 10 | 30 | 22 | 40 | 61 | 81 | 8 | 21 | 26 | 22 | 8 | 17.0 | 36.0 | 180 |
| SI 17 ES | 17 | M16×2.0 | 14 | 11 | 34 | 27 | 46 | 67 | 90 | 10 | 24 | 30 | 25 | 10 | 21.2 | 45.0 | 220 |
| SI 20 ES | 20 | M20×1.5 | 16 | 13 | 40 | 32 | 53 | 77 | 103.5 | 10 | 27.5 | 35 | 29 | 9 | 30.0 | 60.0 | 350 |
| SI 25 ES | 25 | M24×2.0 | 20 | 17 | 48 | 36 | 64 | 94 | 126 | 12 | 33.5 | 42 | 35.5 | 7 | 48.0 | 83.0 | 640 |
| SI 30 ES | 30 | M30×2.0 | 22 | 19 | 56 | 41 | 73 | 110 | 146.5 | 15 | 40 | 50 | 40.7 | 6 | 62.0 | 110 | 930 |
| SI 35 ES | 35 | M36×3.0 | 25 | 21 | 60 | 50 | 82 | 125 | 166 | 15 | 47 | 58 | 47 | 6 | 80.0 | 146 | 1300 |
| SI 40 ES | 40 | M39×3.0 | 28 | 23 | 65 | 55 | 92 | 142 | 188 | 18 | 52 | 65 | 53 | 7 | 100 | 180 | 2000 |
| SI 45 ES | 45 | M42×3.0 | 32 | 27 | 65 | 60 | 102 | 145 | 196 | 20 | 58 | 70 | 60 | 7 | 127 | 240 | 2500 |
| SI 50 ES | 50 | M45×3.0 | 35 | 30 | 68 | 65 | 112 | 160 | 216 | 20 | 62 | 75 | 66 | 6 | 156 | 290 | 3500 |
| SI 60 ES | 60 | M52×3.0 | 44 | 38 | 70 | 75 | 135 | 175 | 242.5 | 20 | 70 | 88 | 80 | 9 | 245 | 450 | 5500 |
| SI 70 ES | 70 | M56×4.0 | 49 | 42 | 80 | 85 | 160 | 200 | 280 | 20 | 80 | 98 | 92 | 6 | 315 | 610 | 8600 |
| SI 80 ES | 80 | M64×4.0 | 55 | 47 | 85 | 100 | 180 | 230 | 320 | 25 | 95 | 110 | 105 | 6 | 400 | 750 | 12000 |
Tips：
If the thread is left-hand (LH), the letter "L" must be appended to the bearing designation, e.g., SIL 18 T/K.
For bearing bore diameter d ≥ 15, the -2RS sealed variant is also available, e.g., SI 20 ES 2RS.
Models marked with an asterisk (*) do not include a lubrication hole or grease nipple.
Industrial Automation: The SI series rod end bearing is widely used in packaging machinery, printing presses and textile equipment, providing precise movement control and reliable linkage performance.
Construction Machinery: The female rod end bearing supports control linkages in excavators, loaders and compactors, delivering excellent load capacity and durability in heavy-duty applications.
Material Handling: The metric female rod end bearing is ideal for pivot points in conveyors, lifting systems and automated guided vehicles, ensuring smooth and stable operation.
Off-Highway Vehicles: The SI..E rod end bearing is suitable for steering and throttle linkage systems in tractors and agricultural machinery, offering secure connections and long service life.
Hydraulic & Pneumatic Cylinders: The SI..ES rod end bearing provides reliable cylinder end mounting with lubrication options, while the steel steel rod end bearing structure ensures high load performance and easy maintenance.
When you choose Gonuo, you benefit from our integrated manufacturing and quality system, directly addressing the core concerns of overseas buyers.
As a professional rod end bearing manufacturer, Gonuo integrates production, quality control and supply chain management to ensure consistent performance from raw materials to finished products. Our strict manufacturing process guarantees stable quality for metric rod end bearing, male rod end bearing and female rod end bearing solutions.
Different applications require different specifications. Gonuo provides custom rod end bearing solutions, including special thread sizes, materials, surface treatments and sealing options. Our engineering team supports OEM and non-standard requirements to deliver reliable industrial rod end bearing solutions with precise tolerances.
Quality consistency is a key concern for global buyers. Each spherical rod end bearing undergoes strict inspection to ensure dimensional accuracy, load performance and durability. Material certificates and inspection reports are available to provide complete product traceability and purchasing confidence.
Leveraging our mature supply chain and large-scale production, we offer stable supply, competitive pricing, and flexible MOQs (bulk or small batches). Our fast replenishment system aligns with your production schedule, helping you reduce procurement costs without compromising quality.
With over 20 years of industry experience, Gonuo has supplied precision transmission components to customers worldwide. As a trusted rod end bearing supplier from China, we focus on long-term partnerships by providing dependable products, professional support and consistent service for global industries.
Whatsapp: +86-18868534347
E-mail: lucy@gonuo-hardware.com
ADD: 904 No.426, Xueshi Road, Yinzhou , Ningbo, China.
Mobile: 0086-18868534347
