This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAIJ80X40-30S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAIJ80X40-30S 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-SIJ80X40-30S
The AirTAC Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X40-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAIJ80X40-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAIJ80X40-30S
About the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X40-30S
The AirTAC B04-SIJ80X40-30S is a double-acting single-rod ISO 15552 adjustable-stroke cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the base SIJ80X40-30S, mechanically identical with a 80mm bore, G3/8 port, and M20x1.5 rod thread. This discontinued model lets you trim the extend stroke by up to 30mm on-site, giving a usable 10-40mm range from the 40mm nominal maximum. The external stop screw sets the end position but is not a load lock.
The drop-in replacement is the SAIJ80X40-30S, matching the interface, force, and mounting. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure. At 0.5MPa it delivers 2513N push and 2268N pull. A computed buyer insight: safe working load is ~1508N (60% of [email protected]), and vertical lift is ~128kg with a 2:1 margin. Plain cylinders drift on air loss; use SAIL or BSAI for held loads.
Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X40-30S Technical Specifications
| Model | Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X40-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAIJ80X40-30S |
| Bore size | Ø80 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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-SAIJ80X40-30S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The B04-SAIJ80X40-30S 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-SIJ80X40-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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-SIJ80X40-30S Is Used
Excavator Actuation
Field-tunes the 10-40mm extend stroke on heavy-equipment doors or covers, tolerating shock loads where a fixed 40mm cylinder would impact too hard.
Loader Linkage
Allows on-site stroke trimming by up to 30mm for construction-machinery linkage pins without machining a hard stop, simplifying assembly tolerances.
Crusher Gate
Provides adjustable 10-40mm clamping reach in heavy-equipment material handling, letting operators fine-tune the end position for varying aggregate sizes.
Replacing the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X40-30S with the B04-SAIJ80X40-30S
To replace the discontinued B04-SIJ80X40-30S, order the exact drop-in SAIJ80X40-30S, keeping the -S magnet for current AirTAC switches (legacy used CS1-B/DS1-B). Size both ways: the 63mm bore neighbor yields 1559N [email protected], while the 100mm bore yields 3927N. The -30 adjust window lets you tune the 40mm extend down to 10mm on-site, which beats fitting a fixed SAI plus an external stop. Reuse ISO 15552 FA, LB, or TC mounts. For strokes >=300mm, verify side-load guidance. The stop sets end position, not a lock; for held loads use an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAIJ80X40-30S
- ✓ 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-SIJ80X40-30S FAQ
Yes, the B04-SIJ80X40-30S (construction-machinery dedicated variant of SIJ80X40-30S) is discontinued. The exact drop-in replacement is the SAIJ80X40-30S. It shares the identical ISO 15552 interface, 80mm bore, 40mm stroke, 30mm adjust window, G3/8 port, and mounting. The SAIJ features an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
The 80mm bore provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and 4523N push at 0.9MPa (max 513kgf at 1.0MPa). The external stop screw window is 30mm, allowing you to trim the 40mm nominal extend stroke down to 10mm on-site. The stop sets end position only; it is not a load lock. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
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