This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAID32X250S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAID32X250S 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-SID32X250S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 250mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAID32X250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAID32X250S
About the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X250S
The AirTAC B04-SID32X250S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as a construction-machinery dedicated variant of the base SID32X250S. It is mechanically identical, featuring a 32mm bore, 250mm stroke, and a rod exiting both ends so that push and pull force are equal both ways (345N at 0.5MPa). It uses a G1/8 port and M10x1.25 rod thread. This SID model is discontinued and the exact drop-in replacement is the SAID32X250S, which reuses the same ISO 15552 mounting interface.
The SAID upgrade introduces an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. Because the second rod can carry a sensor cam or drive two tools simultaneously, it provides excellent anti-rotation stability. For sizing, the safe working load is roughly 207N (about 60% of the 345N force at 0.5MPa), yielding a vertical lift capacity of approximately 18kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; for held loads without live air, use an external rod lock or the SAIL/BSAI lock variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X250S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID32X250S |
| Bore size | Ø32 mm |
| Stroke | 250 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-SAID32X250S 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-SAID32X250S 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-SID32X250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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-SID32X250S Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery mechanisms where equal push and pull force is required for precise positioning of hydraulic valve covers or linkage guards.
Crane Component Alignment
Uses the dual-rod anti-rotation property to keep heavy-equipment jib components aligned without twisting during extension and retraction cycles.
Loader Sensor Cam Tracking
The rear rod carries a sensor cam to trigger position switches on construction loaders, providing synchronized feedback for automated bucket functions.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID32X250S with the B04-SAID32X250S
To replace the discontinued B04-SID32X250S, select the SAID32X250S, which matches the 32mm bore, 250mm stroke, G1/8 port, and equal-both-ways force. When sizing both ways, verify that 345N at 0.5MPa meets your load requirements, or step up to a 40mm bore if more force is needed. A double rod is right when you need anti-rotation resistance or must drive two tools from one piston. You can reuse FA, LB, or TC mounts via the ISO 15552 interface. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches. For strokes >=300mm, ensure adequate side-load guidance to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID32X250S
- ✓ 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-SID32X250S FAQ
Yes, the B04-SID32X250S is discontinued. The exact drop-in replacement is the SAID32X250S. The B04- prefix simply denotes the construction-machinery dedicated variant, and the SAID replacement matches it exactly on ISO 15552 mounting, 32mm bore, 250mm stroke, and force.
The force is equal both ways at 345N @0.5MPa, 483N @0.7MPa, and 621N @0.9MPa. The bore is 32mm with a G1/8 air port. It operates at 0.15-1.0 MPa with a speed of 30-800 mm/s.
Related AirTAC SAI Cylinders
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