How to Match Crimp Fittings with R1AT and R2AT Hose Assemblies

To match a crimp fitting with an R1AT or R2AT hose assembly, confirm the hose series, nominal size, fitting series, end connection, and required crimp dimensions against the hose and fitting manufacturer’s specifications. R1AT hose has 1 steel-wire braid layer, while R2AT has 2; that construction difference means fittings and ferrules should not be treated as interchangeable unless the manufacturer explicitly approves the combination. Select the fitting by its stated compatibility with the exact hose, then follow the specified assembly and crimping instructions.

You can find more information on our web, so please take a look.

A correct match is more than choosing a fitting that appears to fit the hose end. The assembly must also suit the working pressure, fluid, temperature, routing, and connection requirements of the hydraulic system. This guide provides a practical selection and verification process for buyers, maintenance teams, and hose assemblers.

Quick Takeaways

• Identify whether the hose is R1AT or R2AT, and confirm its size and manufacturer.
• Use a fitting and ferrule specifically listed for that hose type and size.
• Match the fitting end to the equipment port, including thread type, size, and sealing method.
• Use the manufacturer’s crimp chart, tooling, and assembly instructions; do not assume one crimp setting works for every combination.
• Verify the finished assembly against application requirements before installation.

Understand the Hose and Fitting Combination

What R1AT and R2AT Mean for Selection

R1AT and R2AT identify common wire-braid hydraulic hose constructions. R1AT uses 1 steel-wire braid layer, whereas R2AT uses 2 steel-wire braid layers. The additional reinforcement in R2AT affects the hose construction and outer dimensions, so the fitting maker’s compatibility information—not appearance alone—should determine the correct fitting and ferrule.

In a crimp assembly, the hose is inserted over the fitting’s stem or nipple, and a ferrule is compressed around the hose end using specified tooling. The stem, ferrule, hose, and crimp dimensions work as a matched system. A fitting from a different series may look similar but can have a different stem profile, ferrule dimensions, or required crimp setting.

Separate Hose Size from Fitting-End Size

Hose size describes the hose bore, while the fitting end describes how the assembly connects to a port or component. For example, a nominal dash size of -08 commonly denotes a 1/2 in hose inside diameter under standard dash sizing conventions. The fitting’s connection may have a different size designation, so specify both values when ordering.

Also identify the connection style rather than relying on a thread diameter alone. Examples include JIC, BSP, NPT, and metric connections, each of which may differ in thread form and sealing method. Where possible, confirm the equipment port specification or provide a drawing or sample to avoid selecting a fitting that threads on but does not seal correctly.

Step-by-Step Matching Process

1. Confirm the Hose Identification

Read the hose marking and record the hose type, nominal size, manufacturer, and any applicable standard or product-series information. If the marking is incomplete, verify the construction and dimensions with the hose supplier rather than identifying the hose by color or outside appearance. Hose products that seem similar are not automatically approved for the same fitting system.

2. Select a Compatible Fitting and Ferrule

Consult the fitting manufacturer’s compatibility chart for the exact R1AT or R2AT hose series and size. Confirm whether the listed combination requires a particular stem, ferrule, or assembly method. Do not combine a stem from one fitting family with a ferrule from another unless the manufacturer specifically approves that combination.

Check whether the assembly instructions call for skiving—the removal of some or all of the hose cover—or specify a non-skive arrangement. This choice depends on the fitting design and product instructions. Applying the wrong preparation method can affect the finished assembly, so follow the specified procedure rather than using a familiar method by default.

3. Match the End Connection to the Equipment

Specify the connection type, nominal size, gender, orientation, and sealing arrangement required at each end. An assembly may use different fitting styles at its two ends, so record each end separately. For angled fittings, confirm the required orientation and how it will be maintained during crimping and installation.

Link to Hengshui Xinchi Hose Manufacturing Co., Ltd.

4. Verify Application Requirements

Compare the hose-and-fitting assembly rating with the system’s operating conditions, including pressure, temperature, fluid compatibility, and expected movement. Use the rating for the complete assembly where provided, not simply the maximum figure printed for one component. If pressure spikes, external abrasion, or tight routing are possible, ask the supplier or engineering team to review the duty conditions.

Check the required hose length and routing before production. The bend radius and clearance must follow the hose manufacturer’s guidance, and the hose should not be forced into a bend immediately behind a fitting. Consider whether guards, sleeves, clamps, or a different fitting angle are needed for the installation environment.

5. Crimp to the Published Specification

Use the specified crimp machine, die set, and setup instructions for the selected hose-fitting combination. The required finished crimp outside diameter is product-specific and must come from the applicable manufacturer chart. Measure and record the crimp as instructed, using suitable measuring equipment, and do not substitute a setting taken from another hose size or fitting series.

Follow the stated insertion-depth, cutting, cleaning, and inspection instructions as well. A clean, square hose cut and correct insertion help the assembler produce a consistent connection, but they do not replace the required crimp measurement. If a crimp result falls outside the specified range, stop and investigate the setup rather than installing the assembly.

Common Matching Mistakes

• Choosing by appearance: Similar-looking fittings may have different stem or ferrule designs. Confirm the product series and compatibility listing.
• Assuming R1AT and R2AT use the same fitting: Use a shared fitting only when the manufacturer lists it for both hose types and sizes.
• Confusing hose size with port size: State the hose dash size and each end-connection specification separately.
• Using a remembered crimp diameter: Obtain the crimp target for the exact combination and current tooling setup.
• Ignoring fluid and operating conditions: Check compatibility and assembly ratings for the actual application.
• Skipping assembly checks: Verify insertion, crimp dimensions, fitting orientation, and visible condition before use.

Buyer Checklist for a Reliable Order

To obtain an accurate quotation or compatibility review, provide the hose type and size, required length, fitting details for both ends, operating pressure and temperature, hydraulic fluid, and expected quantity. Add drawings, photographs, or a sample when the port or fitting identification is uncertain. This information helps the supplier assess the requested assembly without relying on assumptions.

Ask the supplier to confirm the hose-fitting-ferrule combination, required assembly method, crimp specification, and any applicable inspection requirements. For repeat orders, retain the approved part numbers and assembly details so purchasing and production can refer to the same configuration. If a system or component changes, recheck compatibility instead of assuming the previous assembly specification still applies.

How Hengshui Xinchi Can Support Your Selection

Hengshui Xinchi Hose Manufacturing Co., Ltd. supports B2B buyers sourcing rubber hose products and related hydraulic hose assembly components. Share your hose identification, connection requirements, and application conditions so our team can review the requested configuration and clarify the information needed for a suitable match. For non-standard ends or uncertain specifications, a drawing or sample can help make the request more precise.

Before production, confirm the approved hose series, fitting and ferrule details, assembly instructions, and delivery requirements in writing. This process gives both the buyer and supplier a clear reference for quotation and order review. Contact Hengshui Xinchi with your hose and fitting specifications to discuss your R1AT or R2AT assembly requirements.

Conclusion

Match crimp fittings with R1AT and R2AT hose assemblies by verifying the exact hose type and size, selecting a fitting and ferrule listed for that hose, and matching each fitting end to its equipment connection. Then check application suitability and crimp the assembly to the manufacturer’s specified dimensions using the correct tooling. If any identification or compatibility detail is uncertain, pause production and request confirmation with the hose markings, connection details, and application requirements.

Are you interested in learning more about How to Match Crimp Fittings with R1AT and R2AT Hose Assemblies? Contact us today to secure an expert consultation!