This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI63X150 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI63X150 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-SI63X150
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150 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-SAI63X150, 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-SAI63X150
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150
The AirTAC B04-SI63X150 is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix designates it as the construction-machinery dedicated variant, mechanically identical to the base SI63X150 with a 63 mm bore, 150 mm stroke, and 1559 N push force at 0.5 MPa. AirTAC replaced this EOL unit with the SAI63X150, a true drop-in upgrade sharing the same G3/8 port, M16x1.5 rod thread, and ISO 15552 mounting interface.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For your sizing, the safe working load is roughly 935 N (60% of the 1559 N push force), yielding a vertical lift capacity of about 79 kg with a 2:1 margin. Note this SKU lacks a magnet, so it cannot accept legacy CS1-B/DS1-B sensors.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150 Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI63X150 |
| 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-SAI63X150 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-SAI63X150 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-SI63X150
| 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-SI63X150 Is Used
Excavator Actuation
Drives secondary auxiliary mechanisms on heavy construction equipment where the B04- prefix indicates dedicated machinery deployment.
Material Pressing
Applies 1559 N of push force at 0.5 MPa for clamping and pressing steel components in fabrication jigs.
Heavy Load Diversion
Shifts bulky pallets or construction materials along assembly lines, utilizing the 150 mm stroke for positive routing.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI63X150 with the B04-SAI63X150
To replace the B04-SI63X150, order the SAI63X150. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 port, and the 150 mm stroke. Because this SKU has no -S magnet, it cannot support position sensing; if detection is needed, specify an SAI63X150S. For loads requiring holding on air loss, note that standard cushions only decelerate; use an external pilot check valve or the SAIL/BSAI lock variants. If downsizing, the 50 mm bore yields 982 N push at 0.5 MPa; if upsizing, the 80 mm bore provides 2513 N. Operating speed remains 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI63X150
- ✓ 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-SI63X150 FAQ
Yes, the B04-SI63X150 is discontinued. The exact drop-in replacement is the SAI63X150. It features the same ISO 15552 mounting interface, 63 mm bore, 150 mm stroke, output force, and G3/8 port. The B04- prefix simply marked it as construction-machinery dedicated; the SAI upgrade is mechanically identical and fits existing fixtures.
This 63 mm bore cylinder has a G3/8 air port. It delivers 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 max of 318 kgf at 1.0 MPa. The safe working load is approximately 935 N.
Related AirTAC SAI Cylinders
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