This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAID100X25S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAID100X25S 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAID100X25S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID100X25S
About the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S
The AirTAC B04-SID100X25S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID100X25S, mechanically identical in every spec. A rod exits both ends on a single piston, meaning both faces use the rod-side area and push/pull force is equal both ways (3681 N @0.5 MPa). The bore is 100 mm, featuring a 25 mm piston rod, a G1/2 air port, and an M20x1.5 rod-end thread. This model is discontinued.
The exact drop-in replacement is the SAID100X25S, which reuses the same ISO 15552 mounting interface, bore, stroke, and porting. The SAI family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life, while introducing SAIL and BSAI lock variants. For this cylinder, the safe working load is approximately 2209 N (60% of the 3681 N @0.5 MPa figure), and it can vertically lift about 188 kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; an external rod lock is required for load holding.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID100X25S |
| Bore size | Ø100 mm |
| Stroke | 25 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-SAID100X25S 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-SAID100X25S 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S Is Used
Excavator Actuation
Drives auxiliary mechanisms on heavy equipment where equal push and pull forces are required to handle heavy construction attachments smoothly.
Crusher Feed Control
Regulates material flow on construction site crushers, using the back rod to mount a sensor cam for precise position feedback in dusty environments.
Loader Gear Shift
Shifts transmission gears in loaders, benefiting from the anti-rotation properties of the double-rod design to prevent binding under high vibration.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S with the B04-SAID100X25S
To replace the discontinued B04-SID100X25S, select the SAID100X25S, which offers a direct drop-in swap preserving the ISO 15552 mounting interface, G1/2 port, and 25 mm stroke. Size both ways by verifying the equal force requirement (3681 N @0.5 MPa); if less force is acceptable, neighboring bores like 80 mm provide 2268 N, while up-sizing to 125 mm yields 5734 N. A double-rod design is right when you need anti-rotation stability, the ability to drive two tools simultaneously, or space to mount a sensor cam on the back rod. Mounting options include Basic, FA, LB, and TC brackets. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Because the stroke is under 300 mm, side-load risks are minimal, but for any load-holding without live air, use an external rod lock or check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID100X25S
- ✓ 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X25S FAQ
Yes, the B04-SID100X25S is discontinued. The exact drop-in replacement is the SAID100X25S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID100X25S, so the SAID100X25S matches it perfectly in bore, stroke, G1/2 port, and ISO 15552 mounting.
Because it is a double-rod cylinder, force is equal both ways: 3681 N @0.5 MPa, 5153 N @0.7 MPa, and 6626 N @0.9 MPa. The bore is 100 mm with a G1/2 air port. The safe working load is roughly 2209 N, and it can vertically lift about 188 kg with a 2:1 margin.
Related AirTAC SAI Cylinders
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