This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X700S, 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-SID80X700S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X700S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 700mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X700S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke700 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X700S
- 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-SID80X700S
The AirTAC B04-SID80X700S is an ISO 15552 double-acting double-rod cylinder where the B04- prefix marks it as a construction-machinery dedicated variant, mechanically identical to the standard SID80X700S. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. It features a 25 mm rod, M20x1.5 thread, G3/8 port, and 36 mm adjustable air cushions. This legacy model is discontinued.
The direct replacement is the SAID80X700S, which reuses the same ISO 15552 mounting interface, bore, stroke, and G3/8 port. The SAI upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant to hold loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X700S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X700S |
| Bore size | Ø80 mm |
| Stroke | 700 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-SAID80X700S 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-SAID80X700S 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-SID80X700S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×700 | 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-SID80X700S Is Used
Excavator Linkage Actuation
Uses the equal both-ways force of the double rod to drive synchronized opposing jaws or linkage arms on heavy construction equipment without stroke drift.
Concrete Plant Diverter
Mounts a cam on the rear rod for position sensing while the front rod shifts an abrasive material diverter gate, benefiting from the 80 mm bore's 3175 N @0.7 MPa force.
Crane Outrigger Locking
Provides stable push and pull actuation for secondary locking pins on mobile cranes, using the ISO 15552 TC mount to handle high side-load stresses.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X700S with the B04-SAID80X700S
To replace the discontinued B04-SID80X700S, specify the SAID80X700S, which provides a direct swap retaining the ISO 15552 interface, 80 mm bore, 700 mm stroke, G3/8 port, and equal both-ways force. When sizing both ways, verify your load against the 2268 N @0.5 MPa safe baseline, and consider neighbour bores (63 mm or 100 mm) if your force margin is tight. A double-rod design is the right choice when you need anti-rotation stability, want to drive two tools from one piston, or need to mount a sensor cam on the back rod. You can reuse FA, LB, or TC mounts. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches (the SAI uses current switches). For this 700 mm stroke, add external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X700S
- ✓ 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-SID80X700S FAQ
Yes, the B04-SID80X700S is discontinued. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID80X700S, changing no physical specs. The direct replacement is the SAID80X700S, which matches the 80 mm bore, 700 mm stroke, G3/8 port, and ISO 15552 mounting.
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.
Related AirTAC SAI Cylinders
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