This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID32X300S, 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-SID32X300S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X300S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 300mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID32X300S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke300 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAID32X300S
- 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-SID32X300S
The B04-SID32X300S is an ISO 15552 double-acting double-rod cylinder where the B04- prefix marks it as AirTAC's construction-machinery dedicated variant, mechanically identical to the base SID32X300S. A rod exits both ends, meaning push and pull force are equal at 345 N @0.5 MPa, 483 N @0.7 MPa, and 621 N @0.9 MPa. It features a 32 mm bore, G1/8 port, M10x1.25 rod thread, and 27 mm adjustable cushions. This legacy model is discontinued; the direct replacement is the SAID32X300S.
The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The double-rod design prevents rotation and lets the back rod carry a sensor cam. Note that air cushions only decelerate; for load holding use an external rod lock.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X300S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X300S |
| Bore size | Ø32 mm |
| Stroke | 300 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-SAID32X300S 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-SAID32X300S 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-SID32X300S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×300 | 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-SID32X300S Is Used
Excavator Linkage
Equal both-ways force drives dual-tool mechanisms on heavy equipment without rotational play.
Loader Gauge Arm
The rear rod carries a sensor cam to track positioning in harsh cab environments.
Crane Spreader
Anti-rotation stability from the double-rod design keeps loads aligned during vertical travel.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X300S with the B04-SAID32X300S
To replace the discontinued B04-SID32X300S, use the SAID32X300S, which preserves the ISO 15552 mounting interface, bore, stroke, and equal-both-ways force. Size both directions by checking neighboring bores if more force is needed, as push and pull are identical. A double rod is right when you need anti-rotation or must drive two tools. Mounting options include FA, LB, and TC. The -S suffix means a magnet is present for CS1-B/DS1-B switches. For this 300 mm stroke, use external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X300S
- ✓ 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-SID32X300S FAQ
Yes, it is discontinued. The direct replacement is the SAID32X300S. The B04- prefix simply marks the construction-machinery dedicated variant, so the SAID version shares the exact 32 mm bore, G1/8 port, and ISO 15552 mounting interface.
Force is equal both ways at 345 N @0.5 MPa, 483 N @0.7 MPa, and 621 N @0.9 MPa. The air port is G1/8. The cylinder operates at 30-800 mm/s and does not hold loads without live air.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID32X300S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID32X300S replacement — usually within 7-8 hours.