This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD40X75S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD40X75S in place of this model. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S is a double-acting profile-type standard cylinder with a Ø40mm bore and 75mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD40X75S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke75 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAUD40X75S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S
The AirTAC B04-SUD40X75S is a discontinued double-rod profile cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SUD40X75S, sharing identical specifications. A rod exits both ends on a single piston, meaning push and pull force are equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The extruded aluminium profile barrel is more compact than an ISO 15552 cylinder. It features a 1/4" port, M12x1.25 rod thread, and adjustable air cushions.
As this model is end-of-life, the exact drop-in replacement is the SAUD40X75S, which matches the 40mm bore, 75mm stroke, force, and FA/LB mounting. The double-rod design provides anti-rotation stability and allows the back rod to carry a sensor cam for synchronized positioning. For sizing, the equal-both-ways force yields a safe working load of about 317 N (60% of the 528 N @0.5 MPa figure) and a vertical lift capacity of roughly 27 kg with a 2:1 margin. Note that the SAUD upgrade uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches found on this unit.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD40X75S |
| Bore size | Ø40 mm |
| Stroke | 75 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD40X75S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The B04-SAUD40X75S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S Is Used
Excavator Door Latching
Equal push and pull force securely drives and retracts heavy latching pins on construction machinery access panels without rotational drift.
Boom Arm Positioning
The double-rod architecture provides stable, anti-rotation movement for guiding auxiliary hydraulic or pneumatic control links on heavy equipment.
Material Ejection Gates
Drives two synchronized ejection flaps from a single compact profile body, ensuring balanced debris clearing on construction sites.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S with the B04-SAUD40X75S
To replace the discontinued B04-SUD40X75S, select the SAUD40X75S, which is a drop-in match for bore, stroke, 1/4" port, and FA/LB mounting. When sizing, verify the equal-both-ways force (528 N @0.5 MPa) meets your requirement, or step to neighbouring bores (32mm or 50mm) for different loads. A double-rod cylinder is the right choice when you need anti-rotation stability or must drive two tools simultaneously. If your stroke is 300mm or longer, carefully manage side-load alignment to prevent guide wear. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches; when migrating to the SAUD, you must upgrade to CMSG/DMSG/EMSG sensors. Remember, the air cushion only decelerates near stroke end and does not hold loads on air loss—use an external rod lock for vertical holding.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD40X75S
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X75S FAQ
Yes, the B04-SUD40X75S (the construction-machinery dedicated variant of SUD40X75S) is discontinued. The exact drop-in replacement is the SAUD40X75S, which shares the same 40mm bore, 75mm stroke, equal force, 1/4" port, and FA/LB mounting. You only need to upgrade the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG models.
Because it is a double-rod cylinder, the push and pull force are equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The air port is 1/4". The piston rod is 16mm with an M12x1.25 thread, and speed ranges from 30-800 mm/s.
Related AirTAC SAU Cylinders
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