This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI32X100 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI32X100 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-SI32X100
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 100mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI32X100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke100 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAI32X100
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X100
The AirTAC B04-SI32X100 is a discontinued double-acting ISO 15552 profile cylinder delivering 402 N push force at 0.5 MPa. The B04- prefix marks it as the construction-machinery dedicated variant of the base SI32X100, mechanically identical to the standard line. AirTAC replaced this legacy unit with the SAI32X100, a true drop-in upgrade retaining the same 32 mm bore, 100 mm stroke, G1/8 port and ISO 15552 mounting interface.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For load holding on construction equipment, note that a plain cylinder drifts on air loss—the cushion only decelerates. Use an external pilot check valve or the SAIL lock variant. With no -S suffix, this SKU cannot accept a sensor. Safe working load is roughly 241 N (60% of 402 N), yielding a 20 kg vertical lift capacity with a 2:1 margin.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X100 Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI32X100 |
| Bore size | Ø32 mm |
| Stroke | 100 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-SAI32X100 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-SAI32X100 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-SI32X100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | 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-SI32X100 Is Used
Excavator Door Latches
Actuates secondary safety latches on heavy equipment cab doors, using the 100 mm stroke to clear the locking pin before operator entry.
Filter Compactor Ejector
Pushes spent hydraulic filter elements out of the housing on construction machinery service stations with 402 N of push force.
Boom Pedestal Guard
Drives a 100 mm stroke cover that shields the boom pivot pin when heavy machinery is parked, preventing debris ingress.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI32X100 with the B04-SAI32X100
To replace this discontinued cylinder, order the SAI32X100. It drops directly into existing ISO 15552 fixtures with the same 32 mm bore, 100 mm stroke, G1/8 port (PT/G/NPT thread options) and M10x1.25 rod thread. Because this SKU lacks the -S magnet option, it cannot support legacy CS1-B/DS1-B sensors; order the SAI with -S if position sensing is required. For sizing, the 402 N push force at 0.5 MPa gives a safe working load of 241 N (about 20 kg vertical lift at 2:1 safety). If higher force is needed, the neighboring 40 mm bore offers 628 N push at 0.5 MPa. For loads needing static holding on air loss, select the SAIL (air-released lock) or BSAI (clamp-lock) variant instead of relying on the air cushion.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI32X100
- ✓ 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-SI32X100 FAQ
Yes, the B04-SI32X100 is discontinued. The exact drop-in replacement is the AirTAC SAI32X100. The SAI family is dimensionally interchangeable per ISO 15552, matching the 32 mm bore, 100 mm stroke, G1/8 port and mounting interface. The B04- prefix simply designated the construction-machinery variant, and the SAI replacement shares all physical specs.
The bore is 32 mm with a G1/8 air port and M10x1.25 rod thread. Force output is 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, 724 N push at 0.9 MPa, and a theoretical maximum of 82 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
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