This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAIJ100X40-30S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAIJ100X40-30S 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-SIJ100X40-30S
The AirTAC Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ100X40-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAIJ100X40-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAIJ100X40-30S
About the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ100X40-30S
The AirTAC B04-SIJ100X40-30S is a double-acting single-rod ISO 15552 adjustable-stroke cylinder built for construction machinery. The B04- prefix marks it as a construction-machinery dedicated variant, mechanically identical to the base SIJ100X40-30S. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 10-40 mm extend window from the 40 mm nominal maximum. The 100 mm bore features a G1/2 port, M20x1.5 rod thread, and 36 mm adjustable cushions. This SIJ model is discontinued; the exact drop-in replacement is the SAIJ100X40-30S, sharing the same interface, force, and mounting.
At 0.5 MPa it delivers 3927 N push and 3681 N pull force (5497 N push at 0.7 MPa). The computed safe working load is roughly 2356 N (60% of the 0.5 MPa push), translating to a 200 kg vertical lift with a 2:1 margin. The SAIJ upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure. Remember the stop screw sets end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ100X40-30S Technical Specifications
| Model | Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ100X40-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAIJ100X40-30S |
| Bore size | Ø100 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAIJ100X40-30S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAIJ100X40-30S 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-SIJ100X40-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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-SIJ100X40-30S Is Used
Excavator Actuation
Field-tunes the extend stroke on heavy-equipment doors or covers where a fixed 40 mm stroke lacks the flexibility needed for varied site alignments.
Crane Mechanism Locking
Provides adjustable end-position stopping for construction crane components, allowing on-site trim of the extend stroke by up to 30 mm without changing cylinders.
Paving Equipment Positioning
Handles adjustable positioning of flow gates or deflectors in pavers, utilizing the 3927 N push force at 0.5 MPa to move heavy aggregates reliably.
Replacing the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ100X40-30S with the B04-SAIJ100X40-30S
To replace the discontinued B04-SIJ100X40-30S, order the drop-in SAIJ100X40-30S, keeping the 40 mm nominal stroke and 30 mm adjust window. The external stop screw shortens the extend stroke by up to 30 mm on-site, giving a 10-40 mm usable range; it sets end position but is not a load lock. When sizing both ways, neighboring bores offer different forces: the 80 mm bore yields 2513 N push at 0.5 MPa, while the 125 mm bore yields 6136 N. Mounting options include Basic, FA, LB, and TC using genuine ISO 15552 interface dimensions. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. For strokes over 300 mm, verify side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAIJ100X40-30S
- ✓ 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-SIJ100X40-30S FAQ
Yes, the B04-SIJ100X40-30S is discontinued. The exact drop-in replacement is the SAIJ100X40-30S. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the base SIJ. The SAIJ shares the same ISO 15552 interface, 100 mm bore, 40 mm stroke, 30 mm adjust window, G1/2 port, and mounting.
The double-acting single-rod 100 mm bore provides 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and 7068 N push at 0.9 MPa (theoretical max 801 kgf at 1.0 MPa). The external stop screw window is 30 mm, allowing you to trim the extend stroke by up to 30 mm on-site for a usable 10-40 mm range. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
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