This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAIJ32X100-30S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAIJ32X100-30S 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-SIJ32X100-30S
The AirTAC Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-30S 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-SAIJ32X100-30S, 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-SAIJ32X100-30S
About the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-30S
The AirTAC B04-SIJ32X100-30S is a double-acting single-rod ISO 15552 adjustable-stroke cylinder where the leading B04- prefix designates it as a construction-machinery dedicated variant of the base SIJ32X100-30S. It is mechanically identical to the standard model, featuring a 32 mm bore, G1/8 port, and a 100 mm nominal stroke. An external stop screw allows you to trim the extend stroke by up to 30 mm on-site, yielding a usable extend range of 70-100 mm. This cylinder is discontinued, and the exact drop-in replacement is the SAIJ32X100-30S, which shares the same ISO 15552 mounting interface, bore, and force characteristics.
The SAIJ replacement incorporates an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life compared to the original SIJ. At 0.5 MPa, this 32 mm bore generates 402 N of push force and 345 N of pull force, peaking at 724 N push at 0.9 MPa. Based on the 0.5 MPa push figure, the computed safe working load is approximately 241 N (60% of 402 N), translating to a vertical lift capacity of about 20 kg with a 2:1 safety margin. Remember that the external stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-30S Technical Specifications
| Model | Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAIJ32X100-30S |
| 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-SAIJ32X100-30S 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-SAIJ32X100-30S 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-SIJ32X100-30S
| 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-SIJ32X100-30S Is Used
Excavator Pilot Controls
Field-tunes the extend stroke by up to 30 mm on-site to dial in pilot valve actuation points without swapping the entire cylinder body on heavy equipment.
Crane Outrigger Interlock
Provides adjustable end-positioning for deployment sensors, allowing precise 70-100 mm extend stops to confirm outrigger lock status in mobile crane systems.
Concrete Mixer Gate Actuation
Adjusts the discharge gate extend endpoint on-site to regulate material flow, compensating for linkage wear without repositioning the ISO 15552 rear mount.
Replacing the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ32X100-30S with the B04-SAIJ32X100-30S
To replace the discontinued B04-SIJ32X100-30S, order the SAIJ32X100-30S, which is a true drop-in swap retaining the 32 mm bore, 100 mm nominal stroke, 30 mm adjust window, G1/8 port, and M10x1.25 rod thread. When sizing both ways, the neighboring 40 mm bore yields 628 N push at 0.5 MPa, while a smaller option would fall below the 32 mm's 402 N push. The 30 mm adjust window is ideal if your construction-machinery mechanism needs precise extend endpoint tuning between 70 mm and 100 mm without machining spacers. Mounting interchangeability via the ISO 15552 interface allows you to reuse existing FA, LB, or TC brackets. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For strokes at or above 300 mm, carefully manage side loads to prevent rod bearing wear, though this 100 mm unit is highly compact. Operating speed is 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAIJ32X100-30S
- ✓ 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-SIJ32X100-30S FAQ
Yes, the B04-SIJ32X100-30S is discontinued. The B04- prefix simply marks it as a construction-machinery dedicated variant of the base SIJ32X100-30S, meaning it is mechanically identical to the standard model. The exact drop-in replacement is the SAIJ32X100-30S, which matches the 32 mm bore, 100 mm stroke, 30 mm adjust window, G1/8 port, and ISO 15552 mounting.
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 provides a 30 mm adjust window, allowing you to shorten the extend stroke from the 100 mm maximum down to 70 mm on-site. Note that the stop sets end position but is not a load lock.
Related AirTAC SAI Cylinders
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