SAE 100 R2AT is a high-pressure hydraulic hose type made with a synthetic rubber tube, two braided steel-wire reinforcement layers, and a protective rubber cover. Buyers commonly consider it for hydraulic lines carrying compatible fluids in equipment exposed to demanding operating conditions. The right hose depends on more than the type designation: confirm the required working pressure, bore size, temperature range, fluid compatibility, fittings, and installation bend radius against the manufacturer’s product data. This guide explains the key specifications and provides a practical framework for evaluating hoses and suppliers.
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This guide is for procurement teams, hydraulic distributors, equipment manufacturers, and maintenance buyers comparing SAE 100 R2AT hoses. It is also useful when replacing a hose and checking whether a proposed product matches an existing circuit. Use the information as a purchasing framework rather than as a substitute for a machine manufacturer’s requirements or supplier documentation. If a hose is used in a safety-critical or regulated system, follow the applicable engineering and compliance process.
SAE 100 R2AT describes a hydraulic hose construction covered by SAE J517. The “R2” designation refers to two steel-wire braid reinforcement layers, while “AT” is commonly used in product descriptions for a textile-covered hose construction. A typical hose has an oil-resistant synthetic rubber inner tube and an outer cover selected to protect the reinforcement from the intended service environment. Exact materials and performance can vary by manufacturer, so the product datasheet should be the final reference.
The reinforcement helps the hose contain hydraulic pressure, while the inner tube carries the fluid and the cover provides external protection. R2AT hoses are often selected for pressure lines when their rated performance matches the system. They are not interchangeable solely because another hose looks similar or has the same nominal bore. The complete assembly—including hose, fittings, and crimping specification—must suit the application.
Working pressure is size-specific and may differ among product ranges, so do not infer a rating from “R2AT” alone. Compare the hose’s stated working pressure with the maximum pressure expected in the circuit, taking account of pressure surges where applicable. Also check the inside diameter, outside diameter, and minimum bend radius in the supplier’s technical data. A hose that is too small can affect flow, while incorrect routing or a bend below the specified minimum can shorten service life.
Hose dash sizes are a common way to identify nominal bore. For example, a -8 dash size corresponds to a nominal 1/2-inch bore under the standard eighth-inch sizing convention. This is a nominal size, not a substitute for checking actual dimensions and fitting compatibility. Confirm the connection type, thread, sealing method, and end orientation as well as the hose bore.
Many R2AT product listings state a service temperature range of approximately -40°C to +100°C, but this should be treated as a common product-range reference, not a universal guarantee. The permitted range can depend on the hose manufacturer, hydraulic fluid, pressure, and operating conditions. Check the datasheet for the exact hose and consider both the fluid temperature and the ambient environment. A fluid compatible with one tube compound may not be suitable for another.
Hydraulic hoses are commonly designed for petroleum-based hydraulic oils, but buyers should verify compatibility for their specific fluid, including water-based fluids, synthetic formulations, or other special media. Consider external exposure too: abrasion, weather, heat, chemicals, and cleaning agents may influence cover choice or protection requirements. If the operating conditions are unusual, provide the supplier with the fluid name and concentration, temperature range, pressure, and exposure details before selecting a product.
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SAE 100 R2AT hoses may be used in hydraulic systems on construction equipment, agricultural machinery, material-handling equipment, and industrial machines. Typical circuit locations include pressure lines and other hydraulic connections where the specified pressure and installation conditions are within the product rating. The application name alone does not establish suitability. Confirm the machine manufacturer’s requirements and the hose’s ratings for the actual circuit.
| Application factor | What to confirm | Why it matters |
|---|---|---|
| Operating pressure | Working pressure for the selected bore and hose model | Ratings can vary by size and product range. |
| Fluid and temperature | Tube compatibility and stated service temperature | Fluid or heat outside the specification can affect hose performance. |
| Routing | Bend radius, movement, and abrasion exposure | Installation stress and rubbing can damage the assembly. |
| Connections | Fitting type, thread, end angle, and assembly method | Incorrect connections can prevent proper fit or sealing. |
Record the maximum working pressure, expected pressure variation, required flow, and fluid type. Identify the minimum and maximum operating temperatures, including environmental exposure around the hose. If you are replacing an existing hose, collect its markings and dimensions, but verify them against equipment documentation where possible. Do not assume the installed hose was correctly specified.
Determine the required nominal bore and measure the route, including connection points and movement during operation. Check the supplier’s minimum bend radius and leave enough clearance to avoid twisting, tension, or contact with sharp edges. Specify fitting ends, thread standards, orientation, and assembly length clearly. Where a pre-assembled hose is required, provide the supplier with a drawing or a verified sample when available.
Ask for the hose datasheet and confirmation that the proposed fittings are compatible with that hose series. Hose and fitting combinations should follow the supplier’s assembly instructions, including the correct crimp specification where applicable. Request traceability or inspection documentation if your purchasing requirements call for it. Before installation, check the delivered assembly for correct length, end configuration, and visible damage.
SAE 100 R2AT hose pricing depends on factors such as bore, length, order quantity, cover or packaging options, and whether fittings or custom assemblies are included. Minimum order quantities and production or delivery lead times vary by supplier and item availability. For a useful quotation, provide the requested size, quantity, hose length, operating conditions, fitting details, delivery destination, and any documentation requirements. Ask the supplier to identify assumptions or exclusions in the quotation so that offers can be compared on the same basis.
At XINCHI, we work with B2B buyers evaluating rubber products and hydraulic hose requirements. Share your target specification, application conditions, size, quantity, and fitting needs so we can review the inquiry and clarify what product information is needed for a quotation. For replacement projects, include hose markings or a dimensional drawing where available. Final selection should be confirmed against the applicable equipment requirements and the chosen product’s technical documentation.
SAE 100 R2AT is a two-steel-wire-braid hydraulic hose type used in applications where its documented pressure, temperature, fluid compatibility, and installation limits are suitable. To select it responsibly, match the hose size and rating to the circuit, verify the operating environment, and confirm fittings and routing for the complete assembly. Do not rely on the R2AT designation alone to establish a pressure rating or universal compatibility. Your next step is to compile the application data and request a product datasheet and a clear quotation from your supplier.
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