This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD40X800 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD40X800 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-SUD40X800
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X800 is a double-acting profile-type standard cylinder with a Ø40mm bore and 800mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD40X800, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke800 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAUD40X800
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X800
The AirTAC B04-SUD40X800 is a discontinued double-rod double-acting profile cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the SUD40X800, mechanically identical to the base model with an extruded aluminium profile barrel. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It uses a 1/4 inch port, a Ø16 mm rod, and M12x1.25 rod-end thread. The exact drop-in replacement is the SAUD40X800, which retains the same bore, stroke, force, port, and FA/LB mounting.
For sizing, the 528 N @0.5 MPa force yields a safe working load of about 317 N (60 percent of capacity) and a vertical lift capability of approximately 27 kg with a 2:1 margin. The double-rod design provides anti-rotation stability and allows the back rod to drive a second tool. This SKU has no magnet (-S omitted) and cannot take a magnetic switch; the legacy CS1-B/DS1-B sensors are replaced by CMSG/DMSG/EMSG on the SAUD. The 800 mm stroke requires external guides to prevent rod bending under side loads.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X800 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X800 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD40X800 |
| Bore size | Ø40 mm |
| Stroke | 800 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-SAUD40X800 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-SAUD40X800 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-SUD40X800
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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-SUD40X800 Is Used
Excavator Linkage Actuation
Drives synchronized push-pull mechanisms on heavy-equipment attachments where equal both-ways force prevents linkage droop during construction-machine cycles.
Crusher Gantry Transfer
Moves material processing gantries on construction sites, using the back rod to carry a cam for limit switching without extra brackets.
Paving Machine Alignment
Aligns screed extensions on road paving equipment, relying on the double-rod geometry to resist torsional side-load over the 800 mm extension.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X800 with the B04-SAUD40X800
To replace the discontinued B04-SUD40X800, use the SAUD40X800 drop-in, which keeps the 40 mm bore, 800 mm stroke, 1/4 inch port, and FA/LB mounting. When sizing both ways, check the 32 mm and 50 mm neighbour bores to ensure the 528 N @0.5 MPa equal-both-ways force fits your load. Choose a double rod when you need anti-rotation stability or a back rod to drive a second mechanism. This SKU lacks a magnet, so for sensing you must move to an -S SAUD and switch from CS1-B/DS1-B to CMSG/DMSG/EMSG sensors. For the 800 mm stroke, add external guides to handle side-load and rod-bending forces.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD40X800
- ✓ 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-SUD40X800 FAQ
Yes, the B04-SUD40X800 is discontinued. The B04- prefix marks it as the construction-machinery dedicated variant of the SUD40X800. The exact drop-in replacement is the SAUD40X800, which matches the 40 mm bore, 800 mm stroke, 1/4 inch port, and FA/LB mounting.
Because it is a double-rod cylinder, force is equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The bore is 40 mm, the port is 1/4 inch, the rod is Ø16 mm with an M12x1.25 thread, and the cushion is 21 mm. A plain cylinder does not hold loads on air loss; use an external rod lock for held loads.
Related AirTAC SAU Cylinders
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