STAUFF Channel Rail Adaptor (Type CRA – Standard Series)

Description

The STAUFF Channel Rail Adaptor (Type CRA – Standard Series) is a fundamental solution for anchoring pipework and components in hydraulic circuits used for Fluid Contamination Control. Designed in strict accordance with the dimensional specifications of DIN 3015, Part 1, this adaptor enables perfect integration with a wide range of standardised profiled rails, commonly known as Channel Rails. The mechanical component is fully suitable for use with STAUFF Groups 1 to 8, which correspond exactly to DIN Groups 0 to 8. In addition, the specific CRA 1-8/1D adaptor model is also fully compatible for use with the Twin Series, specifically STAUFF Group 1D.

Channel Rail Dimensional Requirements

To ensure consistently secure and stable fastening of the complete system, the supporting rail into which the adaptor is inserted must strictly comply with precise mechanical coupling requirements. The upper opening of the profiled rail must have a width between a minimum tolerance of 22 mm (0.87 in) and a maximum of 28 mm (1.10 in). The structural thickness of the rail retaining lips must range between 6 mm and 7.5 mm, combined with a required minimum internal depth of 20 mm, although the recommended engineering values range between 24 mm and 30 mm (with a minimum of 0.79 in).

Construction Features and Materials

The adaptor is routinely offered in different material configurations, uniquely identified by specific ordering codes, in order to withstand varying chemical and mechanical stresses within systems. The standard industrial options include two high-performance metal variants:

• Code W3 identifies models manufactured from durable carbon steel, which undergo a rigorous zinc/nickel-plated surface treatment to significantly increase long-term resistance to oxidation.
• Code W5 identifies models manufactured from V4A-grade stainless steel, designated by metallurgical specifications 1.4401 or 1.4571 (fully equivalent to the international AISI 316 / 316 Ti standard).

Upon specific customer request, the manufacturer can supply additional alternative materials and specific surface finishes to meet unusual or highly corrosive operating conditions.

Thread Specifications

All threaded parts of the STAUFF Channel Rail Adaptor (Type CRA – Standard Series) can be selected with two main geometric variants, designed to cover different system standardisation requirements:

• ISO Metric Thread (clearly identified by code M), applicable to standard sizes such as M6 thread.
• Unified Coarse Thread UNC (identified by code U), applicable to typical imperial standard sizes such as 1/4-20 UNC thread.

Applications and Sectors: Integration with Commercial Rails

The outstanding versatility of the STAUFF Channel Rail Adaptor (Type CRA – Standard Series) is fully demonstrated by its extensive documented compatibility with the most commonly used profiled rails currently available for industrial applications. The manufacturer certifies perfect dimensional and structural coupling with the following widely recognised branded profiles:

• HALFEN: Full compatibility with HM 41/41, HZA 41/22, HZM 41/41, HZM 41/22, HL 41/41 and HL 41/B2 Series.
• HILTI: Confirmed compatibility with MQ-21, MQ-41, MQ-52 and MQ-72 Series, including specific U variants (MQ-21U, MQ-41U, MQ-72U) and D variants (MQ-21D, MQ-41D, MQ-52-72D).
• UNISTRUT: Operational support for an extensive range of rails, including models P1000, P1000T, P1000V, P1000VT, P1001, P2000, P2000T, P3003, P3003T, P3300V, P3300VT, P3301, P4000, P4000T, P5000, P5000T, P5001, P5500, P5500T and P5501.
• STAUFF: Direct native coupling with proprietary Cushion Clamp Series profiles, specifically models SCS-048-1-PL, SCS-048-1GR-, SCS-120-1-PL, and SCS-120-1GR-.

For use with additional rail types not included in these standard families, the dimensions must be checked in advance by comparing the rail dimensions with the official technical drawings supplied by the manufacturer in order to prevent incorrect coupling.

Summary Technical Table of the Main Features of the STAUFF Channel Rail Adaptor (Type CRA – Standard Series).

Product Codes