This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID32X350S, 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-SID32X350S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 350mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID32X350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke350 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAID32X350S
- 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-SID32X350S
The AirTAC B04-SID32X350S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant, mechanically identical to the standard SID32X350S. A rod exits both ends on a single piston, meaning both faces use the rod-side area and push/pull force is equal both ways (345 N at 0.5 MPa). It features a 32 mm bore, G1/8 port, M10x1.25 rod thread, and 27 mm adjustable air cushions at each end. This legacy model is discontinued.
The direct replacement is the SAID32X350S, sharing the same ISO 15552 interface, bore, stroke, and mounting. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. A back rod can carry a sensor cam or drive two tools simultaneously. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X350S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X350S |
| Bore size | Ø32 mm |
| Stroke | 350 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-SAID32X350S 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-SAID32X350S 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-SID32X350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×350 | 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-SID32X350S Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment with equal push and pull force, using the back rod for a sensor cam to track linkage position.
Crusher Tool Sync
Operates two opposing crushing jaws simultaneously from one piston, ensuring perfectly synchronized force application both ways.
Loader Gauge Pusher
Provides anti-rotation stability for pushing heavy material gauges in construction machinery cabs, preventing rod twist under offset loads.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X350S with the B04-SAID32X350S
To replace the discontinued B04-SID32X350S, use the SAID32X350S directly—matching the 32 mm bore, 350 mm stroke, G1/8 port, and ISO 15552 mounting. Because force is equal both ways, sizing is symmetrical; if higher force is needed, step up to the 40 mm bore (528 N at 0.5 MPa), or drop to a smaller bore if load allows. Choose a double-rod cylinder when you need anti-rotation stability, a back rod for a sensor cam, or to drive two tools. The -S magnet enables position sensing. For this 350 mm stroke, use external guides to prevent rod bending and side-load wear. Mounting options include Basic, FA, LB, and TC. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X350S
- ✓ 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-SID32X350S FAQ
Yes, the B04-SID32X350S is discontinued. The direct replacement is the SAID32X350S. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the SID32X350S. The SAID replacement shares the same ISO 15552 interface, 32 mm bore, 350 mm stroke, G1/8 port, and mounting hardware.
Force is equal both ways at 345 N (@0.5 MPa), 483 N (@0.7 MPa), and 621 N (@0.9 MPa). Speed is 30-800 mm/s. A plain cylinder does not hold loads on air loss—the piston drifts and the 27 mm cushion only decelerates near stroke end. For held loads, use an external rod lock or the SAIL/BSAI variant.
Related AirTAC SAI Cylinders
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