This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID32X50, 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-SID32X50
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50 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-SAID32X50, 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-SAID32X50
- 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-SID32X50
The AirTAC B04-SID32X50 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, generating equal force in both directions (345 N at 0.5 MPa). The B04- prefix marks this as AirTAC's construction-machinery dedicated variant, mechanically identical to the standard SID32X50 with a 32 mm bore, 50 mm stroke, and G1/8 port. This legacy model is discontinued and is fully replaced by the SAID32X50.
The SAID direct replacement reuses the exact ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure. Because the second rod can drive two tools or carry a sensor cam while resisting rotation, it offers high design flexibility. Note this non-magnetic SKU cannot accept switches, and air cushions only decelerate; use an external rod lock for load holding.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X50 |
| 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-SAID32X50 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-SAID32X50 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-SID32X50
| 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-SID32X50 Is Used
Excavator Linkage
Drives synchronized dual-end tooling on heavy-equipment linkages where equal push and pull force is mandatory.
Loader Brake Valve
Acts as a pilot actuator in compact construction machinery, using its anti-rotation properties for stable alignment.
Crane Guide Mechanism
Positions guide arms on mobile cranes, leveraging the back rod for external cam tracking without sensors.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X50 with the B04-SAID32X50
To replace the discontinued B04-SID32X50, order the SAID32X50, which matches the 32 mm bore, 50 mm stroke, G1/8 port, and equal both-ways force. If sizing both ways, the neighboring bores are 40 mm (528 N) and 50 mm (825 N). Choose a double-rod cylinder when you need anti-rotation stability or dual-end tooling. Mounting options include Basic, FA, LB, and TC. This SKU lacks the -S magnet and cannot support sensing. For strokes of 300 mm or longer, verify side-load limits.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X50
- ✓ 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-SID32X50 FAQ
Yes, it is discontinued. The direct replacement is the SAID32X50. The B04- prefix simply denotes the construction-machinery dedicated variant of the base SID32X50, so the SAID32X50 matches its 32 mm bore, 50 mm stroke, and ISO 15552 interface perfectly.
Because it is a double-rod cylinder, 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 cylinder operates at 30-800 mm/s, but note it lacks a magnet for sensors and cannot hold loads without an external rod lock.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID32X50
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID32X50 replacement — usually within 7-8 hours.