This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X450-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X450-20S 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 SIJ80X450-20S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X450-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X450-20S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-20S
The AirTAC SIJ80X450-20S is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 450 mm nominal stroke and a built-in piston magnet. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 430-450 mm window. This 80 mm bore delivers 2513 N push and 2268 N pull at 0.5 MPa, features a G3/8 port, and uses an M20x1.5 rod thread. The stop screw sets the end position but is not a load lock.
The exact drop-in replacement is the SAIJ80X450-20S, retaining the same ISO 15552 mounting interface, force, and adjustability. The SAIJ family 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. Note that plain cylinders drift on air loss; for held loads use an external rod lock or the SAIL/BSAI variants.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-20S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X450-20S |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAIJ80X450-20S 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 SAIJ80X450-20S 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 SIJ80X450-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SIJ80X450-20S Is Used
Press Fit Tuning
Allows precise 430-450 mm extend endpoint adjustment for pressing bearings without machining hard stops.
Transfer Diverter
Adjusts the extend position on-site to accommodate varying package widths on a sorting line.
Pallet Stopper
Fine-tunes the 450 mm stroke stop position to handle different pallet depths securely.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-20S with the SAIJ80X450-20S
To replace the discontinued SIJ80X450-20S, order the drop-in SAIJ80X450-20S, which preserves the 450 mm stroke, 20 mm adjust window, G3/8 port, and ISO 15552 mounting. Size both ways by checking the neighbouring bores: the 63 mm offers 1559 N push @0.5 MPa, while the 100 mm provides 3927 N push @0.5 MPa. Choose the 20 mm adjust window if your extend stroke needs on-site tuning between 430 and 450 mm. Mounting options include Basic, FA, LB, and TC. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current switches). Because the stroke is 450 mm, ensure external guides support side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X450-20S
- ✓ 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 SIJ80X450-20S FAQ
Yes, the SIJ80X450-20S is discontinued. The exact drop-in replacement is the SAIJ80X450-20S. It shares the same ISO 15552 interface, 80 mm bore, 450 mm stroke, 20 mm adjust window, and G3/8 port, but adds an upgraded piston seal.
This double-acting single-rod cylinder has a 25 mm rod, M20x1.5 thread, and 36 mm adjustable cushions. Force ratings are 2513 N push and 2268 N pull @0.5 MPa, 3518 N @0.7 MPa, and 4523 N @0.9 MPa. The external stop screw provides a 20 mm adjust window (usable extend 430-450 mm).
Related AirTAC SAI Cylinders
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