SAE100 R1AT and SAE100 R2AT hydraulic hoses differ mainly in wire reinforcement: R1AT has one braided steel-wire layer, while R2AT has two. The additional reinforcement generally allows R2AT to handle higher working pressure in comparable sizes, but it can also make the hose heavier, less flexible, and more costly. Choose between them by checking the hose’s rated pressure at the required inside diameter, along with fluid compatibility, temperature, routing, and applicable standards—not by assuming one type is always better.
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Both hose types are designed for hydraulic service and typically use an oil-resistant inner tube, steel-wire reinforcement, and an outer cover. R1AT is a single-wire-braid construction; R2AT is a two-wire-braid construction. The extra braid in R2AT is the key reason buyers consider it for higher-pressure circuits, but actual pressure ratings and other performance limits are size- and manufacturer-specific.
| Feature | SAE100 R1AT | SAE100 R2AT |
|---|---|---|
| Wire reinforcement | One braided steel-wire layer | Two braided steel-wire layers |
| Pressure capability | Rated working pressure depends on hose size and manufacturer | Often has a higher rated working pressure than R1AT in the same nominal size; verify the datasheet |
| Flexibility and handling | Often lighter and easier to route than a comparable R2AT | Additional reinforcement may increase weight and stiffness |
| Typical selection context | Hydraulic lines whose pressure and application requirements fit its rating | Hydraulic lines that require a higher pressure rating in a suitable size |
| Cost considerations | May be more economical, depending on supplier and specifications | Extra reinforcement may affect price; request a quotation for the exact construction |
SAE dash sizes refer to nominal hose inside diameter in sixteenths of an inch: for example, -08 corresponds to a nominal 8/16 inch, or 1/2 inch, inside diameter. This sizing convention helps identify the bore, but it does not tell you the pressure rating, outside diameter, or minimum bend radius. Those values should be checked in the manufacturer’s technical data for the exact product.
R2AT’s second wire braid is intended to support higher-pressure service than R1AT when comparing suitable, matching sizes. However, a hose’s allowable pressure is not determined by braid count alone. The rated working pressure can differ by size, materials, and construction, so use the product data rather than a general rule of thumb.
When evaluating a circuit, consider its normal operating pressure as well as pressure peaks, pulsation, and the conditions specified by the equipment manufacturer. The hose must be rated for the application, and the fittings and assembled hose must also be suitable for the required pressure. Do not treat a burst-pressure figure as an allowable working pressure.
R1AT is often easier to handle where a line needs a tighter or more complex route, while the additional reinforcement in R2AT can make routing more demanding. This is a general construction comparison, not a substitute for the minimum bend radius listed for a specific product. Bending below that limit, twisting the hose during installation, or forcing it against a fitting can contribute to premature failure.
Check the available installation space and the manufacturer’s minimum bend radius before finalizing hose length and routing. Also consider movement, vibration, abrasion, and proximity to hot surfaces. If the hose will flex repeatedly, ask the supplier to confirm that the selected construction suits the duty cycle.
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Consider R1AT when its documented working-pressure rating meets the system requirement and the application benefits from a lighter or more flexible hose. It may suit hydraulic circuits in mobile or industrial equipment where the operating conditions are within the hose’s specified limits. The final decision still depends on bore size, fluid, temperature, routing, and fitting compatibility.
Consider R2AT when the required working pressure is beyond the rating of an appropriate R1AT size, or when the equipment specification calls for a two-wire-braid hose. Its added reinforcement can support higher-pressure requirements, but it may not be the right choice if routing space or flexibility is limited. Confirm that the selected R2AT product also meets the fluid, temperature, and installation requirements.
R2AT may cost more than a comparable R1AT because it uses additional reinforcement, but the final price depends on size, material, fittings, order quantity, and supplier terms. Availability and lead time also vary with the requested configuration and stock position. For a meaningful comparison, request quotations for the same inside diameter, length, fittings, and documentation requirements.
For B2B sourcing, provide the supplier with the working pressure, hose size, fluid, temperature range, required length, fitting details, and expected order quantity. This reduces the risk of comparing products that look similar but have different ratings or construction details. If the application requires a specific standard or approval, state that requirement explicitly and request confirmation in writing.
The main difference is straightforward: SAE100 R1AT has one braided steel-wire layer, and SAE100 R2AT has two. R1AT is often a practical choice when its rating meets the application and flexibility or handling matters; R2AT is often more suitable when a higher pressure rating is required for the selected size. Neither designation alone confirms suitability—verify the specific product data and assembly requirements before ordering.
For help comparing options, share your hose size, operating pressure, fluid, temperature, routing conditions, and fitting requirements with XINCHI. We can review the requested specifications and provide product information and a quotation for your B2B application.
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