This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI100X100S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI100X100S 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-SI100X100S
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X100S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI100X100S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAI100X100S
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X100S
The AirTAC B04-SI100X100S is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix designates it as the construction-machinery dedicated variant of the SI100X100S, mechanically identical to the base model with a 100mm bore, 100mm stroke, and 3927 N push force at 0.5 MPa. AirTAC replaced this end-of-line unit with the SAI100X100S, a true drop-in upgrade sharing the exact ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread.
The SAI replacement introduces an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. For this bore class, the safe working load is roughly 2356 N (60% of the 0.5 MPa push force), translating to a vertical lift capacity of about 200 kg with a 2:1 margin. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL, SAIF, and BSAI lock or valve variants absent from the SI line.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X100S Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI100X100S |
| Bore size | Ø100 mm |
| Stroke | 100 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-SAI100X100S 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-SAI100X100S 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-SI100X100S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×100 | 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-SI100X100S Is Used
Excavator Actuation
Drives secondary heavy-equipment mechanisms on excavators, utilizing the 3927 N thrust and robust construction-machinery designation.
Concrete Pump Clamps
Actuates heavy clamping jaws on concrete pumping machinery where a 100mm bore and G1/2 port deliver high flow and force.
Loader Lift Gates
Provides reliable vertical lifting force up to 200 kg with a 2:1 safety margin for construction loader lift gates and hatches.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X100S with the B04-SAI100X100S
To replace the B04-SI100X100S, order the SAI100X100S. Confirm the ISO 15552 mounting interface, the 100mm stroke, G1/2 port, and the -S magnet for position sensing. If you need to size up or down, neighboring bores are 80mm (2513 N push @0.5 MPa) and 125mm (6136 N push @0.5 MPa). Note that a plain double-acting cylinder drifts on air loss; the air cushion only decelerates near stroke end. For secure load holding, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variant. The 100mm stroke is short, so side-load rod-bending stress is minimal, but always verify guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI100X100S
- ✓ 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-SI100X100S FAQ
Yes, the B04-SI100X100S (the construction-machinery dedicated variant of SI100X100S) is discontinued. The exact drop-in replacement is the SAI100X100S. It shares the identical ISO 15552 mounting interface, 100mm bore, 100mm stroke, output force, G1/2 port, and accessories, fitting existing fixtures perfectly.
This double-acting cylinder features a G1/2 air port and an M20x1.5 rod thread. It delivers 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, and a theoretical max force of 801 kgf at 1.0 MPa. The -S suffix means it has a magnet for CS1-B/DS1-B sensors.
Related AirTAC SAI Cylinders
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