This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD40X100S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD40X100S 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-SUD40X100S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X100S is a double-acting profile-type standard cylinder with a Ø40mm bore and 100mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD40X100S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke100 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAUD40X100S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X100S
The AirTAC B04-SUD40X100S is a double-acting, double-rod profile cylinder where a rod exits both ends, yielding equal push and pull force of 528N at 0.5MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SUD40X100S, mechanically identical in its 40mm bore, 100mm stroke, 1/4" port, and M12x1.25 rod thread. This discontinued profile barrel is shorter than an ISO 15552 cylinder and uses adjustable 21mm cushions at each end.
Because the second rod acts as an anti-rotation guide and can carry a sensor cam, it is ideal for heavy equipment. This legacy model used CS1-B/DS1-B sensors; the drop-in SAUD40X100S replacement uses CMSG/DMSG/EMSG switches. For sizing, the safe working load is roughly 317N, allowing a vertical lift of about 27kg with a 2:1 margin. Note that air cushions only decelerate; an external rod lock is needed to hold loads.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X100S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X100S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD40X100S |
| Bore size | Ø40 mm |
| Stroke | 100 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-SAUD40X100S 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-SAUD40X100S 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-SUD40X100S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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-SUD40X100S Is Used
Excavator Linkage Control
Drives dual tooling on heavy equipment with equal push and pull force, using the second rod to prevent rotation during digging cycles.
Crusher Feed Gate
Opens and closes material gates on construction machinery where the back rod carries a sensor cam for precise position feedback.
Vibratory Screen Tensioner
Maintains balanced tension on screening equipment, leveraging the compact profile barrel to fit tight machinery frames.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X100S with the B04-SAUD40X100S
To replace the discontinued B04-SUD40X100S, use the SAUD40X100S drop-in, which matches the 40mm bore, 100mm stroke, 528N equal-both-ways force, 1/4" port, and FA/LB mounting. When sizing, verify force at neighboring bores to ensure the 528N @0.5MPa meets your load, and swap the legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches. A double rod is right when you need anti-rotation or must drive two tools. For strokes >=300mm, check side-load limits. A plain cylinder drifts on air loss, so use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD40X100S
- ✓ 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-SUD40X100S FAQ
Yes, the B04-SUD40X100S is discontinued. The exact drop-in replacement is the SAUD40X100S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SUD40X100S, so the SAUD matches the 40mm bore, 100mm stroke, 1/4" port, and force exactly.
Force is equal both ways because it is a double-rod cylinder: 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa. The bore is 40mm, the port is 1/4", and the rod thread is M12x1.25. It never quotes a larger single-rod push value.
Related AirTAC SAU Cylinders
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