This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI80X195S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI80X195S 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-SI80X195S
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X195S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 195mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI80X195S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke195 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAI80X195S
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X195S
The AirTAC B04-SI80X195S is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix marks it as a construction-machinery dedicated variant of the SI80X195S, mechanically identical to the base model with an 80 mm bore, 195 mm stroke, G3/8 port, and 2513 N push force at 0.5 MPa. AirTAC replaced this EOL unit with the SAI80X195S.
The SAI80X195S is a true drop-in replacement sharing the exact ISO 15552 mounting interface, output force, and porting. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. For your sizing, the safe working load is roughly 1508 N (about 60% of the 0.5 MPa push), yielding a 128 kg vertical lift with a 2:1 margin. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X195S Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI80X195S |
| Bore size | Ø80 mm |
| Stroke | 195 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-SAI80X195S 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-SAI80X195S 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-SI80X195S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×195 | 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-SI80X195S Is Used
Excavator Actuation
Drives auxiliary mechanisms on heavy equipment where the 2513 N push force at 0.5 MPa handles robust shifting of external linkage components.
Loader Tool Control
Actuates secondary tooling or covers on construction machinery, utilizing the 195 mm stroke and adjustable 36 mm air cushions to soften end-of-stroke impacts.
Heavy Fixture Clamping
Secures large structural weldments in fabrication jigs, providing a safe working load of 1508 N for rigid holding during machining or assembly.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X195S with the B04-SAI80X195S
To replace the B04-SI80X195S, order the SAI80X195S. Confirm the ISO 15552 interface, 80 mm bore, 195 mm stroke, G3/8 port (PT/G/NPT threads), M20x1.5 rod thread, and the -S magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). Sizing both ways: stepping down to a 63 mm bore gives 1559 N push at 0.5 MPa, while stepping up to 100 mm yields 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. At 195 mm stroke, side-load is manageable, but maintain guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI80X195S
- ✓ 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-SI80X195S FAQ
Yes, the B04-SI80X195S (the construction-machinery dedicated variant of SI80X195S) is discontinued. The exact drop-in replacement is the SAI80X195S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 195 mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly.
The 80 mm bore delivers 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. Operating speed is 30-800 mm/s. It features a 25 mm rod, M20x1.5 thread, and 36 mm adjustable cushions.
Related AirTAC SAI Cylinders
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