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SAE J2244/1-2007: Metric Ports with O-Ring Seal in Truncated Housing (Superseded by ISO 6149-1)
SAE J2244/1-2007 defines dimensions and requirements for metric fluid power ports that use O-ring sealing in a truncated housing. It was technically equivalent to ISO 6149-1 but included an additional M30×2 size and tube outside diameter references. 🛠️ This standard was cancelled in December 2007 and superseded by ISO 6149-1; engineers should now refer to the international standard for new designs.
Scope and Key Specifications
This standard covers ports intended for use with adjustable and nonadjustable heavy-duty stud ends as specified in SAE J2244/2. Ports conforming to SAE J2244/1 can handle working pressures up to 63 MPa for nonadjustable stud ends and 40 MPa for adjustable stud ends. Actual permissible pressure depends on material, design, and operating conditions.
Note on Application: The standard explicitly states that for new hydraulic fluid power designs, only SAE J2244 (now superseded) shall be used. Other port standards such as ISO 1179, ISO 9974, and SAE J1926 are not permitted for new designs in hydraulic fluid power applications.
Port Dimensions and Design Insights
Port dimensions are specified for thread sizes from M8×1 up to M60×2, covering tube ODs from 4 mm to 50 mm. The table below shows selected port dimensions as defined in the standard.
| Thread Size | Tube OD (mm) | Spotface Diameter d2, Large (mm) | Spotface Diameter d2, Small (mm) | L4 Min Full Thread (mm) |
|---|---|---|---|---|
| M8×1 | 4 | 17 | 14 | 10 |
| M12×1.5 | 6 | 23 | 19 | 11.5 |
| M18×1.5 | 12 | 30 | 26 | 14.5 |
| M27×2 | 20 | 40 | 34 | 19 |
| M42×2 | 30 | 60 | 52 | 19.5 |
Design Insight: Ports are an integral part of fluid power components (pumps, motors, valves, cylinders). Proper identification is critical: each port must be marked by a raised ring, the word “metric,” or a permanent label reading “ISO 6149 metric.” This ensures compatibility and compliance during assembly and maintenance. 🔍
Standard Cancellation and Transition to ISO 6149-1
SAE J2244/1 was cancelled in December 2007 because the international standard ISO 6149-1 became the industry-preferred specification for metric ports and stud ends. The two standards are technically equivalent, with the only differences being:
- SAE J2244/1 includes size M30×2 (not in ISO 6149-1).
- SAE J2244/1 shows tube ODs for port sizes (ISO does not).
All new designs should now reference ISO 6149-1 directly. Parts produced to either standard will interchange.
Common Mistake: Using this cancelled standard for new designs or confusing it with ISO 1179, ISO 9974, or SAE J1926. These older standards are explicitly not allowed for new hydraulic fluid power designs.
Frequently Asked Questions (FAQs)
What working pressures are permissible under SAE J2244/1?
Ports may be used at working pressures up to 63 MPa for nonadjustable stud ends and 40 MPa for adjustable stud ends, dependent on materials and operating conditions.
How are SAE J2244/1 ports identified?
Ports must be identified by a raised ring (see Figure 2 in the standard), permanent marking “metric” next to the port, or a component label reading “ISO 6149 metric.”
What is the difference between SAE J2244/1 and ISO 6149-1?
They are technically equivalent. SAE J2244/1 additionally includes size M30×2 and provides tube OD dimensions; ISO 6149-1 does not include these.
Which standard should be used for new hydraulic fluid power designs?
For new designs, use ISO 6149-1 (which supersedes SAE J2244). Do not use ISO 1179, ISO 9974, or SAE J1926 for new hydraulic applications.
