This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement B04-SAUD100X900S, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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-SUD100X900S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X900S is a double-acting profile-type standard cylinder with a Ø100mm bore and 900mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAUD100X900S, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke900 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD100X900S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X900S
The AirTAC B04-SUD100X900S is a double-acting, double-rod profile cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SUD100X900S, mechanically identical in every specification. A rod exits both ends of the extruded aluminum barrel on a single piston, meaning push and pull forces are perfectly equal both ways at 3681 N @0.5 MPa, 5153 N @0.7 MPa, and 6626 N @0.9 MPa. This model is discontinued; the direct replacement is the SAUD100X900S, retaining the 100mm bore, 900mm stroke, 1/2" port, and FA/LB mounting. The rear rod provides an anti-rotation benefit and carries a sensor cam, while the 29mm adjustable cushions at each end only decelerate the load near stroke end.
Operating pressure spans 0.15-1.0 MPa, with a proof pressure of 1.5 MPa and a temperature range of -20 to +70 C. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches; upgrading to the SAUD requires changing to current CMSG/DMSG/EMSG sensors. Because the 900mm stroke is highly susceptible to rod bending, external guides are strongly recommended to manage side loads.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X900S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X900S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD100X900S |
| Bore size | Ø100 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD100X900S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAUD100X900S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X900S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×900 | 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-SUD100X900S Is Used
Excavator Actuation
Drives synchronized dual-tool operations on heavy construction equipment where the B04- prefix indicates machinery-grade dedication and equal both-ways force is critical.
Crane Load Positioning
Uses the rear rod as an anti-rotation guide to maintain precise alignment during heavy lifting tasks, relying on the 1/2" port for high-volume air flow.
Paving Machine Gates
Simultaneously opens and closes dual material gates from a single actuator, ensuring balanced material distribution across the 900mm stroke length.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X900S with the B04-SAUD100X900S
To replace the discontinued B04-SUD100X900S, select the direct replacement SAUD100X900S, which matches the 100mm bore, 900mm stroke, 1/2" port, and FA/LB mounting exactly. Because force is equal both ways, verify your push and pull requirements against the 3681 N @0.5 MPa baseline, sizing up or down to neighboring bores if your application demands a different load capacity. A double-rod design is the right choice when you need anti-rotation stability or must drive two tools simultaneously from one cylinder. If upgrading, note that the -S suffix magnet on this legacy model requires switching from CS1-B/DS1-B sensors to the modern CMSG/DMSG/EMSG equivalents on the SAUD. For the 900mm stroke, external guides are essential to prevent rod bending and premature seal wear from side loads.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD100X900S
- ✓ 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-SUD100X900S FAQ
Yes, the B04-SUD100X900S is discontinued. The B04- prefix marks it as the construction-machinery dedicated variant of the base SUD100X900S, mechanically identical to it. The direct replacement is the SAUD100X900S, which matches the 100mm bore, 900mm stroke, 1/2" port, and FA/LB mounting. You must only upgrade the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG.
Force is equal both ways at 3681 N @0.5 MPa, 5153 N @0.7 MPa, and 6626 N @0.9 MPa. It cannot hold a load on air loss; the 29mm cushions only decelerate near stroke end. For held loads, use an external rod lock or pilot-operated check valve.
Related AirTAC SAU Cylinders
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