This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X120-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X120-50S 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 SIJ80X120-50S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 120mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X120-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X120-50S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50S
The AirTAC SIJ80X120-50S is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 120 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 70-120 mm window. The 80 mm bore uses a G3/8 port, a 25 mm rod, and delivers 2513 N push / 2268 N pull at 0.5 MPa. As an SIJ model it is end-of-life; the exact drop-in replacement is the SAIJ80X120-50S, retaining the same interface, force, and mounting.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. For sizing, the 2513 N push at 0.5 MPa yields a safe working load of roughly 1508 N (60% factor), or a 128 kg vertical lift with a 2:1 margin. The stop screw sets the end position but is not a load lock; the cylinder drifts on air loss. For held loads, use an external rod lock or the SAIL/BSAI lock variants. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X120-50S |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAIJ80X120-50S 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 SAIJ80X120-50S 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 SIJ80X120-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SIJ80X120-50S Is Used
Variable Pitch Indexing
Dialing the extend stroke on-site by up to 50 mm allows a single 80 mm bore actuator to push parts into varying fixture depths without swapping the cylinder body.
Adjustable Transfer Pusher
Trimming the extend stroke from 120 mm down to 70 mm accommodates changing package sizes on a transfer line, using the external stop to set the exact push-off distance.
Multi-Format Pallet Stop
An external stop screw provides precise end-position tuning for diverter arms handling mixed pallet heights, ensuring the 2513 N push force halts loads consistently.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50S with the SAIJ80X120-50S
To replace the discontinued SIJ80X120-50S, order the drop-in SAIJ80X120-50S, keeping the 50 mm adjust window (usable extend 70-120 mm) and -S magnet. To size both ways: the adjacent 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. Mounting reuses ISO 15552 interface dimensions (Basic, FA, LB, TC). If your stroke is 300 mm or longer, verify side-load limits to prevent rod binding. Note that the external stop only sets end position; it is not a lock, so add a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X120-50S
- ✓ 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 SIJ80X120-50S FAQ
Yes, the SIJ80X120-50S is discontinued. The exact drop-in replacement is the SAIJ80X120-50S. It shares the same ISO 15552 interface, 80 mm bore, 120 mm stroke, 50 mm adjust window, G3/8 port, and mounting, but adds an upgraded two Y-shaped one-way piston seal for longer life.
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 (max 513 kgf at 1.0 MPa). The external stop screw trims the extend stroke by up to 50 mm on-site, giving a usable 70-120 mm window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
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