This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI100X40S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI100X40S 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-SI100X40S
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI100X40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAI100X40S
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X40S
The AirTAC B04-SI100X40S is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the SI100X40S, mechanically identical to the base model with 3927 N push force at 0.5 MPa. AirTAC replaced it with the SAI100X40S drop-in: same bore, stroke, G1/2 port, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL and BSAI lock variants absent in the SI line. For this bore, safe working load is roughly 2356 N (60% of [email protected]), yielding a 200 kg vertical lift with a 2:1 margin. The -S suffix means a built-in magnet for legacy CS1-B/DS1-B sensors.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X40S Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI100X40S |
| Bore size | Ø100 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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-SAI100X40S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAI100X40S 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-SI100X40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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-SI100X40S Is Used
Excavator Actuation
Drives secondary auxiliary functions on heavy construction equipment where the B04- prefix indicates machinery-grade robustness and 3927 N output.
Heavy Press Ejection
Provides reliable short-stroke ejection of dense fabricated components from industrial presses using its 40 mm stroke and 801 kgf max force.
Loader Gate Control
Actuates robust diverter or sorting gates on material handling machinery, utilizing the G1/2 port and ISO 15552 mounting for rigid fixture integration.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X40S with the B04-SAI100X40S
To replace the B04-SI100X40S, order the SAI100X40S. Verify the ISO 15552 mounting interface, 100 mm bore, 40 mm stroke, G1/2 port, and mounting accessories. The -S magnet is present for current AirTAC switches. Sizing down, an 80 mm bore yields 2513 N [email protected]; sizing up, a 125 mm bore provides 6136 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use the SAIL or BSAI lock variant, or an external pilot check valve. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI100X40S
- ✓ 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-SI100X40S FAQ
Yes, the B04-SI100X40S is discontinued. The exact drop-in replacement is the SAI100X40S. It is dimensionally interchangeable per ISO 15552, keeping the same 100 mm bore, 40 mm stroke, output force, G1/2 port, and mounting interface. The B04- prefix simply designated the construction-machinery variant, and the SAI replacement matches these physical specs exactly.
The 100 mm bore uses a G1/2 air port and an M20x1.5 rod thread. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, with a theoretical max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
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