This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI80X283S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI80X283S in place of this model. 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-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 283mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI80X283S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke283 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAI80X283S
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S
The AirTAC B04-SI80X283S is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the SI80X283S, mechanically identical to the base model. Delivering 2513 N push force at 0.5 MPa through a 25 mm rod and G3/8 port, it is replaced by the drop-in SAI80X283S.
The SAI80X283S shares the exact ISO 15552 mounting interface, 283 mm stroke, and force ratings. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure. With a 2513 N push at 0.5 MPa, the safe working load is roughly 1508 N, yielding a vertical lift capacity of about 128 kg with a 2:1 margin. The SAI family also adds SAIL, SAIF, and BSAI variants the SI lacked.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI80X283S |
| Bore size | Ø80 mm |
| Stroke | 283 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-SAI80X283S 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-SAI80X283S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×283 | 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-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S Is Used
Excavator Actuation
Drives auxiliary mechanisms on heavy construction equipment where the B04- prefix indicates machinery-dedicated deployment.
Heavy Press Ejection
Provides robust ejection force in demanding fabrication cells using its 2513 N push capacity at 0.5 MPa.
Material Handling Gates
Actuates large sorting gates and heavy structural diverters in industrial manufacturing environments.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S with the B04-SAI80X283S
To replace this discontinued cylinder, order the SAI80X283S. Confirm the ISO 15552 interface, 80 mm bore, 283 mm nonstandard stroke, G3/8 port, and mounting accessory. Because the 283 mm stroke is nonstandard, verify exact delivery. This SKU includes a magnet for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. If sizing up or down, neighboring bores are 63 mm and 100 mm. For load holding, a plain cylinder drifts without live air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 283 mm stroke, guide external loads to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI80X283S
- ✓ 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-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X283S FAQ
Yes, the B04-SI80X283S is discontinued. The exact drop-in replacement is the SAI80X283S. It shares the same ISO 15552 mounting interface, 80 mm bore, 283 mm stroke, force, and G3/8 port. The B04- prefix simply denotes the construction-machinery dedicated variant of the base SI80X283S.
The bore is 80 mm with a G3/8 port. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. The safe working load is approximately 1508 N.
Related AirTAC SAI Cylinders
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