This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X700S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X700S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X700S
- 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S
The AirTAC B04-SID40X700S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID40X700S, mechanically identical with a 40mm bore, 700mm stroke, G1/4 port, and M12x1.25 rod thread. This SID model is discontinued and end-of-life. The direct replacement is the SAID40X700S, which reuses the same ISO 15552 mounting interface, bore, stroke, and port without changes.
The SAI replacement family introduces an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life, alongside new SAIL and BSAI lock variants. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder does not hold its load on air loss; the 27mm adjustable air cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X700S |
| Bore size | Ø40 mm |
| Stroke | 700 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID40X700S carries the same ISO 15552 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-SAID40X700S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×700 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S Is Used
Excavator Linkage Control
Equal both-ways force drives synchronized actuation links on heavy equipment, using the back rod to mount a position sensor cam for closed-loop feedback.
Loader Attachment Shift
Double-rod anti-rotation stability prevents binding during rapid tool changes on construction machinery, maintaining precise alignment under harsh jobsite conditions.
Crusher Tooling Drive
Drives two opposing tools simultaneously from one piston, maximizing workspace efficiency in heavy-duty material processing machinery.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S with the B04-SAID40X700S
To replace the discontinued B04-SID40X700S, select the SAID40X700S. It is a direct: same 40mm bore, 700mm stroke, G1/4 port, and ISO 15552 mounting (Basic, FA, LB, TC). Because it is a double-rod cylinder, force is equal both ways (528 N @0.5 MPa), meaning you size both extension and retraction identically. If neighbouring bores are evaluated, the 32mm bore yields 345 N @0.5 MPa, and the 50mm bore yields 825 N @0.5 MPa. A double rod is right when you need anti-rotation stability, the ability to drive two tools from one cylinder, or a back rod to carry a sensor cam. The -S magnet supports legacy CS1-B/DS1-B sensors. For the 700mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X700S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X700S FAQ
Yes, the B04-SID40X700S is discontinued. The direct replacement is the SAID40X700S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID40X700S, so all physical specs (40mm bore, 700mm stroke, G1/4 port, M12x1.25 thread) are identical. The SAID40X700S reuses the same ISO 15552 mounting interface.
Because it is a double-rod cylinder, push and pull force are equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. Operating pressure is 0.15-1.0 MPa. Speed ranges from 30-800 mm/s. The cylinder features a 27mm adjustable air cushion at each end, but this only decelerates near stroke end; it does not hold the load on air loss.
Related AirTAC SAI Cylinders
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