This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAIJ32X100-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAIJ32X100-50S 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-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S
The AirTAC Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S 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-SAIJ32X100-50S, 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-SAIJ32X100-50S
About the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S
The AirTAC B04-SIJ32X100-50S is a double-acting single-rod ISO 15552 adjustable-stroke cylinder. The leading B04- prefix marks this as a construction-machinery dedicated variant of the base SIJ32X100-50S, mechanically identical to the standard model. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable extend range of 50-100 mm from the 100 mm nominal maximum. The stop sets the end position but is not a load lock. This 32 mm bore uses a G1/8 port, a 12 mm rod, M10x1.25 rod thread, and 27 mm adjustable cushions.
This SIJ model is discontinued; the exact drop-in replacement is the SAIJ32X100-50S, retaining the same ISO 15552 interface, force, port, and mounting. The SAIJ family features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Force output is 402 N push and 345 N pull at 0.5 MPa, reaching 563 N at 0.7 MPa. For sizing, a safe working load is roughly 241 N (60% of the 0.5 MPa push force), equating to a 20 kg vertical lift with a 2:1 margin. Note that a plain cylinder drifts on air loss; for held loads use an external rod lock or the SAIL/BSAI variants.
Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S Technical Specifications
| Model | Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAIJ32X100-50S |
| 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-SAIJ32X100-50S 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-SAIJ32X100-50S 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-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S
| 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-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S Is Used
Excavator Door Latching
Field-tune the extend stroke by up to 50 mm on heavy-equipment doors to achieve a precise latch engagement despite structural tolerances on the construction-machinery frame.
Loader Linkage Positioning
Adjust the end-of-stroke stop on-site to set exact pin alignment positions during loader arm assembly, allowing flexible stroke trimming without swapping cylinders.
Crane Component Testing
Dial in the exact extend position for actuating test fixtures on crane components, using the external stop screw to accommodate varying prototype dimensions.
Replacing the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S with the B04-SAIJ32X100-50S
To replace the discontinued B04-SIJ32X100-50S, order the drop-in SAIJ32X100-50S, which preserves the 32 mm bore, 100 mm nominal stroke, 50 mm adjust window, G1/8 port, and ISO 15552 mounting. When sizing both ways, the neighboring 40 mm bore yields 628 N push at 0.5 MPa, while a smaller option would require confirming from datasheet. Choose the 50 mm adjust window if your assembly requires trimming the extend stroke by up to 50 mm on-site. Mounting options include Basic, FA, LB, and TC. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches (the SAIJ replacement uses current AirTAC switches). For stroke lengths of 300 mm or greater, carefully manage side-load forces to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAIJ32X100-50S
- ✓ 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-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-50S FAQ
Yes, the SIJ series is discontinued. The exact drop-in replacement is the SAIJ32X100-50S. The B04- prefix simply marks this as the construction-machinery dedicated variant of the base SIJ32X100-50S, so all physical specs remain unchanged. The SAIJ replacement shares the same ISO 15552 interface, 32 mm bore, 50 mm adjust window, and G1/8 port.
The 32 mm bore provides 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, and 724 N push at 0.9 MPa, with a theoretical max of 82 kgf at 1.0 MPa. The external stop screw provides a 50 mm adjust window, allowing you to trim the 100 mm nominal extend stroke down to 50 mm on-site. The stop sets end position and is not a load lock; use an external rod lock or SAIL/BSAI variant for load holding.
Related AirTAC SAI Cylinders
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