This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X250S, 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-SID63X250S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X250S
- 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-SID63X250S
The AirTAC B04-SID63X250S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force are equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID63X250S, mechanically identical to the standard line with a G3/8 port and M16x1.5 rod thread. This SID model is discontinued; the direct replacement is the SAID63X250S, which reuses the exact ISO 15552 mounting interface and adds an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Because both faces use the rod-side area, the cylinder provides anti-rotation stability and allows the back rod to carry a sensor cam. The built-in piston magnet (-S) supports legacy CS1-B/DS1-B switches. Note that air cushions only decelerate the piston near stroke end; for load holding on air loss, an external rod lock or pilot-operated check valve is required.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X250S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X250S |
| Bore size | Ø63 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID63X250S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The B04-SAID63X250S 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-SID63X250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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-SID63X250S Is Used
Excavator Linkage Actuation
Drives simultaneous opposing tooling arms on heavy equipment with equal push and pull force, leveraging the anti-rotation properties of the double rod to maintain strict alignment under harsh off-axis loads.
Crane Load Stabilizer
Balances and positions heavy structural counterweights using the back rod as a sensor cam track, ensuring precise positioning feedback for the G3/8 ported pneumatic control loop.
Paver Synchronized Gate
Operates dual opposing flow gates on asphalt pavers where equal both-ways force is critical, utilizing the 30 mm adjustable cushion to decelerate the 250 mm stroke smoothly without shock.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X250S with the B04-SAID63X250S
To replace the discontinued B04-SID63X250S, select the SAID63X250S, which matches the 63 mm bore, 250 mm stroke, G3/8 port, and 30 mm adjustable cushion. When sizing both ways, verify the equal force requirement: if 1402 N @0.5 MPa is insufficient, step up to the 80 mm bore, or drop to the 50 mm bore if less force is needed. A double rod is the right choice when you need anti-rotation resistance or must drive two tools simultaneously. Existing FA, LB, or TC ISO 15552 mounts can be reused. The -S suffix indicates a magnet for legacy CS1-B/DS1-B sensors. For stroke lengths of 300 mm or greater, carefully manage side-load alignment to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X250S
- ✓ 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-SID63X250S FAQ
Yes, the B04-SID63X250S is discontinued. The direct replacement is the SAID63X250S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID63X250S, so all physical specs are identical. The SAID replacement shares the same ISO 15552 mounting interface, bore, stroke, and G3/8 port, but adds an upgraded piston seal.
Because it is a double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The air port is G3/8, the rod thread is M16x1.5, and it operates at 30-800 mm/s. The air cushion only decelerates the piston near stroke end; it does not hold the load on air loss, so an external rod lock is needed for held loads.
Related AirTAC SAI Cylinders
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