This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID32X450, 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-SID32X450
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 450mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID32X450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke450 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAID32X450
- 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-SID32X450
The AirTAC B04-SID32X450 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID32X450, mechanically identical in every specification. A rod exits both ends of the extruded aluminum barrel on a single piston, meaning both faces use the rod-side area and push/pull force is equal both ways (345 N @0.5 MPa). It features a 32 mm bore, 450 mm stroke, G1/8 port, M10x1.25 rod thread, and 27 mm adjustable air cushions at each end. This discontinued model is fully replaced by the direct replacement SAID32X450, which reuses the exact ISO 15552 mounting interface, port, and force ratings.
The SAI upgrade introduces an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. Because the second rod can drive two tools or carry a sensor cam while resisting rotation, double-rod designs offer superior anti-rotation stability. Note this non-magnetic SKU cannot accept switches, and air cushions only decelerate; they do not hold loads on air loss.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X450 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X450 |
| Bore size | Ø32 mm |
| Stroke | 450 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID32X450 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The B04-SAID32X450 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-SID32X450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×450 | 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-SID32X450 Is Used
Excavator Linkage Actuation
Drives synchronized opposing tooling arms on heavy-equipment attachments, using the equal both-ways force to maintain balanced push and pull tension under harsh construction-site conditions.
Concrete Batch Gate Release
Simultaneously operates dual discharge gates on a cement mixer, leveraging the anti-rotation property of the double rod to keep the mechanism aligned during abrasive material flow.
Crane Boom Counterweight Shift
Shifts positioning cams on both ends of a mobile crane carriage, using the back rod as a mechanical stop while the front rod executes the primary 450 mm stroke movement.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X450 with the B04-SAID32X450
To replace the discontinued B04-SID32X450, specify the direct replacement SAID32X450, which preserves the 32 mm bore, 450 mm stroke, G1/8 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC, FTC, TCM1, TCM2) without mechanical changes. Size both ways by checking the equal-both-ways force: 345 N @0.5 MPa, 483 N @0.7 MPa, 621 N @0.9 MPa. If you need more push/pull, step up to the neighboring 40 mm bore (528 N @0.5 MPa). Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. Because this is a non-magnetic SKU (no -S suffix), it cannot accept sensors. For the 450 mm stroke, use external guides to prevent rod bending and side-load wear. For load-holding, add an external rod lock or check valve, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X450
- ✓ 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-SID32X450 FAQ
Yes, the B04-SID32X450 is discontinued. The direct replacement is the SAID32X450. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID32X450; the SAID32X450 is mechanically identical, sharing the same ISO 15552 interface, 32 mm bore, 450 mm stroke, G1/8 port, and equal both-ways force.
Because it is a double-rod cylinder, force is equal both ways: 345 N @0.5 MPa, 483 N @0.7 MPa, and 621 N @0.9 MPa. The air port is G1/8. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
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