This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI63X150S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI63X150S 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-SI63X150S
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI63X150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAI63X150S
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150S
The AirTAC B04-SI63X150S is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix marks this as a construction-machinery dedicated variant, though it is mechanically identical to the base SI63X150S, delivering 1559 N push force at 0.5 MPa through a 63 mm bore and 150 mm stroke. AirTAC replaced this EOL unit with the SAI63X150S, a true drop-in upgrade retaining the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For this bore class, a safe working load is approximately 935 N (about 60% of the 0.5 MPa push force), equating to a vertical lift capacity of roughly 79 kg with a 2:1 safety margin. The included -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family introduces lock and valve variants like the SAIL and BSAI absent from the original SI line.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150S Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI63X150S |
| Bore size | Ø63 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAI63X150S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The B04-SAI63X150S 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-SI63X150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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-SI63X150S Is Used
Excavator Actuation
Drives auxiliary mechanisms on heavy construction equipment where the 1559 N output and robust ISO 15552 profile handle demanding outdoor cycles.
Loader Linkage
Positions pilot valves or engagement links on construction machinery, utilizing the 150 mm stroke and 935 N safe working load for reliable shifting.
Heavy Equipment Assembly
Clamps and positions structural components during machinery fabrication, benefiting from the adjustable 30 mm air cushions at both ends.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150S with the B04-SAI63X150S
To replace the discontinued B04-SI63X150S, order the SAI63X150S. Verify your existing fixture matches the ISO 15552 mounting interface, 63 mm bore, 150 mm stroke, G3/8 port, and M16x1.5 rod thread. Because the -S magnet is present, confirm if you need current AirTAC switches to replace legacy CS1-B/DS1-B sensors. If sizing alternatives, neighboring bores (50 mm or 80 mm) offer 982 N or 2513 N push at 0.5 MPa respectively. Note that a plain ISO 15552 cylinder drifts on air loss; the air cushion only decelerates near stroke end. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. For any stroke over 300 mm, add external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI63X150S
- ✓ 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-SI63X150S FAQ
Yes, the B04-SI63X150S is discontinued. The exact drop-in replacement is the SAI63X150S. The B04- prefix simply denotes the construction-machinery dedicated variant of the SI63X150S, and the SAI replacement matches it perfectly on ISO 15552 mounting, 63 mm bore, 150 mm stroke, force, and G3/8 port.
This double-acting cylinder uses a G3/8 air port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 20 mm rod and M16x1.5 thread.
Related AirTAC SAI Cylinders
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