This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X300-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X300-50S 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X300-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X300-50S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S
The AirTAC SIJ80X300-50S is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable 250-300 mm window from the 300 mm nominal maximum. The 80 mm bore delivers 2513 N push and 2268 N pull at 0.5 MPa, peaking at 4523 N push at 0.9 MPa. It features a 25 mm rod, M20x1.5 thread, 36 mm adjustable cushions, and a G3/8 port. The exact drop-in replacement is the SAIJ80X300-50S, reusing the same ISO 15552 mounting interface and force ratings.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. For sizing, a safe working load is roughly 1508 N (60% of the 0.5 MPa push), equating to a 128 kg vertical lift with a 2:1 margin. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Remember the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X300-50S |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80X300-50S 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 SAIJ80X300-50S 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S Is Used
Variable Depth Boring
Machine tools needing precise on-site extend tuning within a 250-300 mm window to accommodate varying material thicknesses without swapping cylinders.
Adjustable Carton Flap Folding
Packaging lines running mixed box sizes use the 50 mm stop screw to alter the extend endpoint on the fly for consistent flap closure.
Variable Height Palletizing
End-of-arm tooling that must dial in a specific 250-300 mm reach for different pallet heights, relying on the 4523 N push at 0.9 MPa.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S with the SAIJ80X300-50S
To replace the discontinued SIJ80X300-50S, order the drop-in SAIJ80X300-50S, which matches the 80 mm bore, 300 mm nominal stroke, 50 mm adjust window, G3/8 port, and ISO 15552 mounting. 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. Choose the 50 mm adjust window if your extend stroke needs field tuning between 250 mm and 300 mm. Mounting options include Basic, FA, LB, and TC. The -S magnet supports legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For the 300 mm stroke, use external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X300-50S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-50S FAQ
Yes, the SIJ80X300-50S is discontinued. The exact drop-in replacement is the SAIJ80X300-50S. It shares the identical ISO 15552 interface, 80 mm bore, 300 mm stroke, 50 mm adjust window, G3/8 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal.
The 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa. The external stop screw allows you to trim the extend stroke by up to 50 mm on-site, yielding a usable 250-300 mm stroke from the 300 mm nominal maximum. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
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