This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X300, 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-SID80X300
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X300, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X300
- 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-SID80X300
The AirTAC B04-SID80X300 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as a construction-machinery dedicated variant, mechanically identical to the standard SID80X300. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal both ways at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. It features a 25 mm rod, G3/8 port, and M20x1.5 thread. This SID model is discontinued and replaced by the direct replacement SAID80X300, which shares the exact interface, bore, stroke, and mounting.
The double-rod design provides anti-rotation stability and allows the back rod to drive a second tool or sensor cam. The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note this SKU lacks a -S magnet, so it cannot accept magnetic switches.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X300 |
| Bore size | Ø80 mm |
| Stroke | 300 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-SAID80X300 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-SAID80X300 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-SID80X300
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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-SID80X300 Is Used
Excavator Panel Pusher
Applies equal both-ways force to push and retract heavy cab panels on earthmoving equipment without single-rod push asymmetry.
Crane Boom Aligner
Uses the rear rod as a sensor cam target to track boom extension while the front rod drives the alignment linkage.
Loader Fork Divider
Shifts fork tines on heavy machinery with anti-rotation stability, keeping the load centered during material handling.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X300 with the B04-SAID80X300
To replace the discontinued B04-SID80X300, use the direct replacement SAID80X300, which preserves the ISO 15552 mounting interface, G3/8 port, and 1500 mm max standard stroke. Size both ways by matching the equal force of 2268 N @0.5 MPa; if less force is needed, the neighbouring 63 mm bore provides 1402 N, while the 100 mm bore offers 3681 N. A double rod is right when you need anti-rotation resistance or equal push/pull force. Reuse FA, LB, or TC mounts directly. Because this SKU has no -S magnet, magnetic sensing is impossible. For the 300 mm stroke, use external guides to prevent rod bending under side loads. A plain cylinder does not hold loads on air loss; use an external rod lock or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X300
- ✓ 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-SID80X300 FAQ
Yes, the B04-SID80X300 construction-machinery dedicated cylinder is discontinued. The direct replacement is the SAID80X300, which shares the same ISO 15552 interface, bore, stroke, equal force, G3/8 port, and mounting. The B04- prefix only denotes the construction industry variant and does not change physical specs.
Force is equal both ways at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. It uses a G3/8 air port, has a 25 mm rod with M20x1.5 thread, and operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X300
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