This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X80S, 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-SID80X80S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X80S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 80mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X80S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X80S
- 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-SID80X80S
The AirTAC B04-SID80X80S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force are equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the SID80X80S, mechanically identical to the base model with a 25 mm rod, M20x1.5 thread, and G3/8 port. This SID model is discontinued and directly replaced by the SAID80X80S, 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.
Because both faces use the rod-side area, the equal-both-ways force provides inherent anti-rotation stability and allows the back rod to carry a sensor cam. The built-in magnet (-S) supports legacy CS1-B/DS1-B switches. Note that air cushions only decelerate near stroke end; for load holding without live air, an external rod lock or SAIL/BSAI variant is required.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X80S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X80S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X80S |
| Bore size | Ø80 mm |
| Stroke | 80 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-SAID80X80S 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-SAID80X80S 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-SID80X80S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×80 | 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-SID80X80S Is Used
Excavator Control Linkage
Equal both-ways force drives precision positioning of heavy-equipment hydraulic control valves, resisting rotational torque in harsh construction environments.
Crane Outrigger Locking
The double-rod architecture provides stable, symmetrical extension and retraction for outrigger deployment mechanisms on mobile cranes.
Track Tensioner Actuation
Maintains consistent tension on crawler tracks, using the rear rod end to mount a position feedback cam for track slacking detection.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X80S with the B04-SAID80X80S
To replace the discontinued B04-SID80X80S, specify the direct replacement SAID80X80S, which matches the 80 mm bore, 80 mm stroke, G3/8 port, and 36 mm cushion. Size both directions by the equal-both-ways force: 2268 N @0.5 MPa, 3175 N @0.7 MPa, or 4082 N @0.9 MPa. If less force is needed, the 63 mm bore offers 1402 N @0.5 MPa; if more is required, the 100 mm bore provides 3681 N @0.5 MPa. A double-rod design is right when you need anti-rotation resistance or a rear rod to drive a second tool. Mounting options include Basic, FA, LB, and TC. The -S suffix provides a piston magnet for sensors. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X80S
- ✓ 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-SID80X80S FAQ
Yes, the B04-SID80X80S is discontinued. The direct replacement is the SAID80X80S. The B04- prefix simply designates the construction-machinery dedicated variant; mechanically, it is identical to the SID80X80S. The SAID replacement shares the same ISO 15552 mounting interface, 80 mm bore, 80 mm stroke, G3/8 port, and equal-both-ways force, while adding an upgraded piston seal.
Force is equal both ways because the rod exits both ends: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The bore is 80 mm with a G3/8 air port, a 25 mm rod, an M20x1.5 rod thread, and 36 mm adjustable cushions. Speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
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