This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAIJ32X150-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAIJ32X150-50S 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-SIJ32X150-50S
The AirTAC Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X150-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 150mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAIJ32X150-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke150 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAIJ32X150-50S
About the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X150-50S
The AirTAC B04-SIJ32X150-50S is a double-acting single-rod ISO 15552 adjustable-stroke cylinder where the B04- prefix denotes the construction-machinery dedicated variant, mechanically identical to the base SIJ32X150-50S. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable extend range of 100-150 mm from the 150 mm nominal maximum. The 32 mm bore features a G1/8 port, M10x1.25 rod thread, and 27 mm adjustable air cushions. This SIJ model is discontinued; the exact drop-in replacement is the SAIJ32X150-50S, sharing the same interface, force, and mounting.
Force output delivers 402 N push and 345 N pull at 0.5 MPa, reaching 724 N push at 0.9 MPa. A computed buyer insight from the 0.5 MPa data suggests a safe working load of roughly 241 N (60% of push), translating to a vertical lift capacity of about 20 kg with a 2:1 margin. The SAIJ replacement retains the ISO 15552 mounting dimensions for direct reuse and upgrades to a two Y-shaped one-way piston seal for lower start-up pressure. Note that the external stop sets end position but is not a load lock; for held loads use SAIL or an external rod lock.
Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X150-50S Technical Specifications
| Model | Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X150-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAIJ32X150-50S |
| Bore size | Ø32 mm |
| Stroke | 150 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-SAIJ32X150-50S 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-SAIJ32X150-50S 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-SIJ32X150-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×150 | 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-SIJ32X150-50S Is Used
Excavator Door Latch
Field-tunes the extend stroke on heavy-equipment access panels, allowing on-site adjustment of the latching mechanism without machining new mount points.
Loader Spindle Stop
Provides a variable mechanical end-stop for secondary control linkages in construction machinery, accommodating wear and tolerance shifts directly at the machine.
Crane Boom Pin
Acts as an adjustable positioning cylinder for pin insertion alignment on heavy-equipment assemblies, trimming the extend stroke by up to 50 mm to match variable joint geometries.
Replacing the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X150-50S with the B04-SAIJ32X150-50S
To replace the discontinued B04-SIJ32X150-50S, order the drop-in SAIJ32X150-50S, ensuring you keep the -S suffix for the piston magnet required by legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). When sizing both ways, the neighboring 40 mm bore provides 628 N push at 0.5 MPa if more force is needed, while the 32 mm bore offers 402 N push at 0.5 MPa. Choose the 50 mm adjust window if your construction-machinery mechanism requires field-tuning the extend stroke down to 100 mm; for fixed positions, a standard SAI cylinder is simpler. Mounting options include FA, LB, and TC brackets. For strokes of 300 mm or longer, carefully manage side loads to prevent rod bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAIJ32X150-50S
- ✓ 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-SIJ32X150-50S FAQ
Yes, the B04-SIJ32X150-50S (the construction-machinery dedicated variant of SIJ32X150-50S) is discontinued. The exact drop-in replacement is the SAIJ32X150-50S. It shares the same ISO 15552 interface, 32 mm bore, 150 mm stroke, 50 mm adjust window, G1/8 port, and mounting, but uses an upgraded two Y-shaped one-way piston seal.
The 32 mm bore provides 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 max of 82 kgf at 1.0 MPa. The external stop screw window is 50 mm, meaning you can shorten the 150 mm nominal extend stroke down to 100 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
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