This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID32X50S, 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-SID32X50S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 50mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID32X50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke50 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAID32X50S
- 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-SID32X50S
The AirTAC B04-SID32X50S 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; mechanically, it is identical to the base SID32X50S, featuring a 32 mm bore, 12 mm rod, M10x1.25 thread, and G1/8 port. This SID model is discontinued, replaced directly by the SAID32X50S.
The SAID32X50S direct shares the exact ISO 15552 interface, bore, stroke, and mounting, but adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure. The dual-rod design prevents piston rotation and allows the back rod to carry a sensor cam.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X50S |
| Bore size | Ø32 mm |
| Stroke | 50 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-SAID32X50S 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-SAID32X50S 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-SID32X50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×50 | 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-SID32X50S Is Used
Excavator Panel Pusher
Drives exterior control panels on heavy equipment with equal push/pull force, using the back rod to carry a sensor cam for position feedback.
Loader Linkage Sync
Provides anti-rotation stability for synchronized actuation of secondary mechanical arms in construction machinery linkages.
Tooling Changeover
Simultaneously drives two separate tooling attachments from one central ISO 15552 mount, saving space on dedicated machine frames.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50S with the B04-SAID32X50S
Replace the discontinued B04-SID32X50S directly with the SAID32X50S, reusing your existing FA, LB, or TC mounts thanks to the shared ISO 15552 interface. Because force is equal both ways (345 N @0.5 MPa), you size both extension and retraction identically; if more force is needed, step up to the 40 mm bore. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. The -S suffix denotes a built-in magnet for legacy CS1-B/DS1-B switches. For strokes at or above 300 mm, verify side-load limits to prevent guide bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X50S
- ✓ 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-SID32X50S FAQ
Yes, the B04-SID32X50S is discontinued. The direct replacement is the SAID32X50S. The B04- prefix simply denotes the construction-machinery dedicated variant, so the SAID32X50S matches its 32 mm bore, 50 mm stroke, G1/8 port, and ISO 15552 mounting perfectly, while adding an upgraded piston seal.
It features a G1/8 air port and delivers equal force both ways: 345 N at 0.5 MPa, 483 N at 0.7 MPa, and 621 N at 0.9 MPa. The cylinder operates at 30-800 mm/s. Note that the air cushion only decelerates near stroke end; it does not hold loads on air loss, so an external rod lock is required for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID32X50S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID32X50S replacement — usually within 7-8 hours.