This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAIJ80X200-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAIJ80X200-50S 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-SIJ80X200-50S
The AirTAC Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X200-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 200mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAIJ80X200-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke200 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAIJ80X200-50S
About the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X200-50S
The AirTAC B04-SIJ80X200-50S is an ISO 15552 adjustable-stroke, double-acting single-rod pneumatic cylinder. The leading "B04-" prefix marks this as a construction-machinery dedicated variant, mechanically identical to the base SIJ80X200-50S. An external stop screw allows you to trim the extend stroke by up to 50 mm on-site, yielding a usable extend range of 150-200 mm from the 200 mm nominal maximum. This 80 mm bore cylinder features a Ø25 mm piston rod, M20x1.5 rod-end thread, 36 mm adjustable air cushions, a G3/8 port, and operates at 30-800 mm/s. The built-in magnetic piston (-S) supports legacy CS1-B/DS1-B switches for position sensing.
This SIJ model is discontinued and the exact drop-in replacement is the SAIJ80X200-50S, which preserves the ISO 15552 mounting interface, bore, stroke, adjust window, and force. The SAIJ upgrade introduces an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. For drive force, it delivers a push of 2513 N and pull of 2268 N at 0.5 MPa, reaching 3518 N at 0.7 MPa. A practical computed insight: the safe working load is approximately 1508 N (60% of the 0.5 MPa push force), translating to a vertical lift capacity of about 128 kg with a 2:1 safety margin. Note that the external stop sets end position but is not a load lock; cylinders drift 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-SIJ80X200-50S Technical Specifications
| Model | Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X200-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAIJ80X200-50S |
| Bore size | Ø80 mm |
| Stroke | 200 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-SAIJ80X200-50S 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-SAIJ80X200-50S 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-SIJ80X200-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×200 | 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-SIJ80X200-50S Is Used
Excavator Arm Positioning
Field-tunes the extension of a secondary actuator arm on earthmoving equipment, using the 50 mm adjust window to dial in the exact reach without disassembling the hydraulic or pneumatic circuit.
Concrete Pump Gate Control
Regulates material flow gates on heavy machinery where job-site conditions demand precise end-position adjustments to handle varying aggregate mixes and discharge rates.
Crane Outrigger Locking Assist
Drives an auxiliary alignment mechanism on mobile cranes, relying on the 80 mm bore's 2513 N push force at 0.5 MPa to position components before the primary mechanical lock engages.
Replacing the Airtac B04-SIJ Construction Machinery Special ISO Standard Cylinder B04-SIJ80X200-50S with the B04-SAIJ80X200-50S
To replace the discontinued B04-SIJ80X200-50S, select the drop-in SAIJ80X200-50S, which matches the 80 mm bore, 200 mm stroke, 50 mm adjust window, G3/8 port, and ISO 15552 mounting footprint. When sizing both ways, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N push at 0.5 MPa. The 50 mm adjust window is ideal if your construction-machinery mechanism requires field tuning of the extend stroke between 150 mm and 200 mm without changing the cylinder body. Mounting options include Basic, FA, LB, and TC brackets. The -S suffix indicates a magnetic piston for switch sensing (legacy CS1-B/DS1-B; the SAIJ replacement uses current AirTAC switches). For strokes of 300 mm or longer, carefully manage side loads to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAIJ80X200-50S
- ✓ 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-SIJ80X200-50S FAQ
Yes, the B04-SIJ80X200-50S (construction-machinery dedicated variant of SIJ80X200-50S) is discontinued. The exact drop-in replacement is the SAIJ80X200-50S. It features the same ISO 15552 interface, 80 mm bore, 200 mm stroke, 50 mm adjust window, G3/8 port, and mounting options, but uses an upgraded SAI piston seal.
The double-acting single-rod cylinder delivers a push of 2513 N and pull of 2268 N at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa, with a theoretical max of 513 kgf at 1.0 MPa. The external stop screw provides a 50 mm adjust window, allowing you to shorten the extend stroke on-site from the 200 mm maximum down to 150 mm. The stop sets end position only and does not lock the load.
Related AirTAC SAI Cylinders
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