This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI32X150 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI32X150 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-SI32X150
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X150 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 150mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI32X150, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke150 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAI32X150
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X150
The AirTAC B04-SI32X150 is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the SI32X150, mechanically identical to the base model with a 32mm bore and 150mm stroke. Delivering 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32X150.
The SAI32X150 is a drop-in upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force and port. It features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. A computed buyer insight: safe working load is ~241N (60% of 402N), yielding a ~20kg vertical lift with a 2:1 margin. Note this no-S SKU cannot take a sensor; legacy CS1-B/DS1-B switches required the -S magnet option.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X150 Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X150 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI32X150 |
| Bore size | Ø32 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAI32X150 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The B04-SAI32X150 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-SI32X150
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | 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-SI32X150 Is Used
Excavator Actuation
Drives secondary auxiliary mechanisms on heavy equipment where a compact 402N @0.5MPa force class and 150mm stroke fit tight envelope constraints.
Loader Linkage
Positions small loader components or electronic throttle links, benefiting from the 30-800mm/s speed range and adjustable 27mm air cushions.
Heavy Equipment Panels
Automates access doors and filter covers on construction machinery, utilizing the ISO 15552 profile barrel for rigid, flush mounting.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X150 with the B04-SAI32X150
To replace this discontinued cylinder, order the SAI32X150. Confirm the ISO 15552 interface, 32mm bore, 150mm stroke, G1/8 port (PT/G/NPT thread options) and mounting accessory (LB, FA, CA, TC). This no-magnet SKU cannot accept a sensor; if position detection is needed, select an SAI32X150S and use current AirTAC switches. Sizing both ways: if 402N push @0.5MPa is insufficient, the neighbouring 40mm bore yields 628N. If downsizing, the 32mm bore is the smallest available. Because stroke is 150mm (over 300mm triggers a guide note, but 150mm is moderate), ensure side-load is minimized. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI32X150
- ✓ 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-SI32X150 FAQ
Yes, the B04-SI32X150 is discontinued. The exact drop-in replacement is the SAI32X150. The B04- prefix simply denoted the construction-machinery dedicated variant of the SI32X150; the SAI32X150 matches it exactly on ISO 15552 mounting interface, 32mm bore, 150mm stroke, force, and G1/8 port.
This double-acting cylinder has a 32mm bore, 12mm rod, M10x1.25 thread, and G1/8 port. Force output is 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa. Speed is 30-800mm/s, pressure range is 0.15-1.0MPa, and it has 27mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAI32X150
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAI32X150 replacement — usually within 7-8 hours.