SKF SIR 35 ES spherical plain bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Spherical plain bearings and rod ends
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Description
SKF SIR 35 ES belongs to spherical plain bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for SIR 35 ES and any equivalents.
SKF SIR ES rod ends are radial spherical rod ends with a female thread. They handle radial loads while permitting oscillation and misalignment, which makes them suitable for hydraulic cylinders, steering linkages, suspension and articulation points. MR Industrial Accessories supplies these rod ends and can help you confirm the correct size for your assembly.
The code breaks down into two parts. SIR denotes the radial rod end family with internal (female) thread. ES refers to the version that combines a steel cage, a lubrication facility and standard sealing. The number that follows indicates the thread diameter and the rod end size: SIR 20 ES, SIR 25 ES, SIR 30 ES, SIR 35 ES, SIR 40 ES, SIR 50 ES, SIR 60 ES and SIR 70 ES. As that number increases, the outer dimensions and the load capacity grow. If you need to cross this code to an equivalent, our team can assist.
Typical installations include hydraulic and pneumatic cylinders, steering systems, suspension components, farm machinery, road equipment, cranes and conveyors. In dusty or variable-load environments, the ES sealing helps keep contaminants out. Automation and test rigs that need controlled oscillation also use these rod ends. For very dirty conditions, adding extra seals is worth considering.
When selecting an SIR ES, look at three things: the thread diameter, the head width and the permissible oscillation angle. Correct mounting means the shafts align properly and no parasitic bending loads are introduced. Regular lubrication with lithium grease supports service life, particularly where movement is continuous or frequent.
SKF SIR ES rod ends can be interchanged with other brands that share the same dimensional designation, such as the GE series or similar products from European and Asian makers. Because tolerances, materials and sealing arrangements vary, comparing data sheets before substitution is recommended. MR can point you to equivalents that will not compromise the assembly.
If you already have the rod end code, send it to MR via WhatsApp or email. We will quote the SIR ES you need and can also advise you if you are unsure between sizes or want an alternative for your application.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does SIR ES mean on an SKF rod end?
- SIR is the series of radial rod ends with female thread. ES indicates the design with steel cage, lubrication and standard sealing. The following number (20, 25, 30, etc.) gives the size and thread diameter. This is SKF's nomenclature for this rod end family.
- How do I choose the correct size of SIR ES rod end?
- You need the thread diameter, the head width and the required oscillation angle. Radial load and environmental conditions also matter. If you have the original code or the housing dimensions, send them to us and we will help you select the right model.
- Are SKF SIR ES rod ends interchangeable with other brands?
- They are often interchangeable with other brands that follow the same standardized dimensions, such as the equivalent GE series. However, differences in tolerances, material and sealing can affect performance. Always verify the data sheet of both options before replacing.