This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X50, 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-SID80X50
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X50
- 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-SID80X50
The AirTAC B04-SID80X50 is an ISO 15552 double-acting double-rod cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID80X50, mechanically identical in every spec. Because a rod exits both ends, push and pull force are equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The bore is 80 mm, port is G3/8, rod thread is M20x1.5, with 36 mm adjustable cushions. This SKU has no -S magnet and cannot take a sensor.
This SID model is discontinued and replaced by the direct replacement SAID80X50, which reuses the exact ISO 15552 mounting interface and port. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. Double-rod benefits include anti-rotation and driving two tools.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X50 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X50 |
| Bore size | Ø80 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID80X50 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The B04-SAID80X50 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-SID80X50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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-SID80X50 Is Used
Excavator Linkage
Equal push/pull force drives dual-tool mechanisms on heavy equipment without stroke drift asymmetry.
Loader Boom Control
Anti-rotation stability from the double-rod design keeps construction machinery bores aligned under lateral stress.
Crane Fixture Actuation
Simultaneous actuation from both rod ends synchronizes clamping arms on heavy-duty structural fixtures.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X50 with the B04-SAID80X50
To replace the discontinued B04-SID80X50, use the SAID80X50; it is a direct swap retaining the G3/8 port, M20x1.5 thread, and ISO 15552 mounting. Size both ways by checking neighbor bores: the 63mm yields 1402 N @0.5 MPa, and the 100mm yields 3681 N @0.5 MPa. Choose a double rod when you need anti-rotation or must drive two tools. Mount via FA, LB, or TC. As this lacks the -S magnet, no sensor can be fitted. For strokes >=300mm, manage side-load line. Air cushions only decelerate; for held loads use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X50
- ✓ 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-SID80X50 FAQ
Yes, the B04-SID80X50 (construction-machinery dedicated SID80X50) is discontinued. The direct replacement is the SAID80X50, sharing the same ISO 15552 interface, 80mm bore, 50mm stroke, G3/8 port, and equal force.
Force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The air port is G3/8, rod thread is M20x1.5, and speed is 30-800 mm/s. It cannot hold a load on air loss; use an external rod lock.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X50
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID80X50 replacement — usually within 7-8 hours.