This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID32X500S, 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-SID32X500S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 500mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID32X500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke500 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAID32X500S
- 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-SID32X500S
The AirTAC B04-SID32X500S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force (345 N at 0.5 MPa). The B04- prefix marks this as a construction-machinery dedicated variant of the base SID32X500S, mechanically identical to it. Because the SID line is discontinued, the direct replacement is the SAID32X500S, which reuses the same G1/8 port, M10x1.25 rod thread, and mounting interface.
The double-rod design prevents piston rotation and lets the rear rod carry a sensor cam for CS1-B/DS1-B switches. The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for lower start-up pressure. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X500S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X500S |
| Bore size | Ø32 mm |
| Stroke | 500 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-SAID32X500S 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-SAID32X500S 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-SID32X500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×500 | 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-SID32X500S Is Used
Excavator Valve Actuation
Drives pilot valves on heavy equipment where equal push/pull force and anti-rotation are critical for stable hydraulic control.
Crane Fixture Clamping
Powers dual-tool clamping fixtures on construction machinery frames, using the rear rod to mount a position-sensing cam.
Heavy Equipment Guide Arms
Actuates positioning arms on earthmoving machinery, requiring the equal both-ways force of a 32 mm double-rod cylinder.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X500S with the B04-SAID32X500S
To replace the discontinued B04-SID32X500S, specify the SAID32X500S, which matches the 32 mm bore, 500 mm stroke, G1/8 port, and ISO 15552 mounting. Size both ways by checking the equal-both-ways force: if 345 N at 0.5 MPa is insufficient, step up to the 40 mm bore (528 N), or drop to a smaller bore if overspecified. A double rod is right when you need anti-rotation, dual tool driving, or a rear sensor cam. Reuse FA, LB, or TC mounts. The -S suffix means the magnet is present for switches. For this 500 mm stroke, use external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X500S
- ✓ 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-SID32X500S FAQ
Yes, the SID line is discontinued. The direct replacement is the SAID32X500S. The B04- prefix only denotes the construction-machinery dedicated variant; mechanically it is identical to the SID32X500S. The SAID replacement shares the same ISO 15552 interface, 32 mm bore, 500 mm stroke, G1/8 port, and force.
Force is equal both ways: 345 N at 0.5 MPa, 483 N at 0.7 MPa, and 621 N at 0.9 MPa. The air port is G1/8, the rod thread is M10x1.25, and speed ranges 30-800 mm/s. It uses 27 mm adjustable cushions. Air cushions only decelerate; use an external rod lock for load holding.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID32X500S
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