This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X400, 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-SID80X400
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X400
- 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-SID80X400
The AirTAC B04-SID80X400 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The B04- prefix marks this as a construction-machinery dedicated variant of the base SID80X400, mechanically identical with the same Ø25 mm rod, M20x1.5 thread, and G3/8 port. This SID model is discontinued and is fully replaced by the direct replacement SAID80X400, which reuses the exact ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life.
The rear rod can carry a sensor cam or drive a second tool, but this specific SKU lacks the -S magnet and cannot accept a magnetic switch. A plain cylinder does not hold loads on air loss; the 36 mm adjustable air cushions only decelerate near stroke ends, so use an external rod lock or the SAIL/BSAI lock variants for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X400 |
| Bore size | Ø80 mm |
| Stroke | 400 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-SAID80X400 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-SAID80X400 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-SID80X400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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-SID80X400 Is Used
Excavator Linkage Control
Drives dual-action construction machinery linkages where equal push and pull force is required for balanced actuation of heavy equipment components.
Heavy Equipment Positioning
Uses the rear rod to synchronize a secondary mechanism on construction vehicles, leveraging the double-rod design for compact dual-tool operation.
Machinery Synchronization
Provides anti-rotation stability in rugged construction machinery frames, ensuring precise alignment during repetitive material handling cycles.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X400 with the B04-SAID80X400
To replace the discontinued B04-SID80X400, use the SAID80X400 direct: it matches the 80 mm bore, 400 mm stroke, G3/8 port, and ISO 15552 mounting (Basic, FA, LB, TC, FTC, TCM1, TCM2). Size both ways by checking neighbouring bores (63 mm or 100 mm) against your equal-both-ways force requirement. A double-rod cylinder is right when you need anti-rotation stability, equal push/pull force, or a back rod to drive a second mechanism. For this 400 mm stroke, use external guides to prevent rod bending under side loads. This non-magnetic SKU cannot take switches; choose the -S option if you need sensor tracking.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X400
- ✓ 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-SID80X400 FAQ
Yes, the B04-SID80X400 is discontinued. The direct replacement is the SAID80X400. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID80X400. The SAID replacement shares the exact ISO 15552 interface, 80 mm bore, 400 mm stroke, G3/8 port, and force, while adding an upgraded piston seal.
Because it is a double-rod cylinder, 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. It operates at 0.15-1.0 MPa with a speed of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X400
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