This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X25S, 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-SID80X25S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X25S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X25S
- 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-SID80X25S
The AirTAC B04-SID80X25S 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. The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the base SID80X25S with a 25mm stroke, G3/8 port, and M20x1.5 rod thread. This SID model is discontinued; the direct replacement is the SAID80X25S.
The SAI upgrade features a two Y-shaped one-way piston seal 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 on air loss.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X25S |
| Bore size | Ø80 mm |
| Stroke | 25 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-SAID80X25S 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-SAID80X25S 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-SID80X25S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×25 | 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-SID80X25S Is Used
Excavator Linkage
Equal push/pull force actuates compact construction-machinery covers and access panels where space limits single-rod rollback.
Heavy Equipment Braking
Drives dual mechanical links in heavy-equipment pilot brake systems, using the back rod for a cam that trips a proximity sensor.
Crane Counterweight
Anti-rotation double-rod design pushes and pulls counterweight locking pins on mobile cranes without requiring a guide block.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X25S with the B04-SAID80X25S
Replace the discontinued B04-SID80X25S directly with the SAID80X25S, reusing the exact ISO 15552 mounting interface and FA, LB, or TC mounts. Size both ways using the equal 2268 N @0.5 MPa force, or step to the 100mm or 63mm neighbor bores if your load requires. A double rod is right when you need anti-rotation, to drive two tools, or to mount a sensor cam on the back rod. The -S suffix provides a piston magnet for CS1-B/DS1-B switches. Because the 25mm stroke is under 300mm, side-load moment is minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X25S
- ✓ 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-SID80X25S FAQ
Yes, the B04-SID80X25S (construction-machinery dedicated SID80X25S) is discontinued. The direct replacement is the SAID80X25S, offering the same ISO 15552 interface, 80mm bore, 25mm stroke, G3/8 port, and equal force both ways.
Force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. Speed is 30-800 mm/s. The air port is G3/8, the rod thread is M20x1.5, and it uses 36mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X25S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID80X25S replacement — usually within 7-8 hours.