This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X120-50STC — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X120-50STC 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 SIJ80X120-50STC
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50STC 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 SAIJ80X120-50STC, 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 → SAIJ80X120-50STC
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50STC
The AirTAC SIJ80X120-50STC 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 50mm on-site, giving a usable 70-120mm extension out of the 120mm nominal maximum. This 80mm bore delivers 2513N push and 2268N pull at 0.5MPa, features a 25mm rod, M20x1.5 thread, and a G3/8 port.
As the SIJ line is end-of-life, the exact drop-in replacement is the SAIJ80X120-50STC, matching the interface, force, and TC mount. The SAIJ upgrade uses a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Computed buyer insight: safe working load is roughly 1508N (60% of the 0.5MPa push), yielding a 128kg vertical lift with a 2:1 margin. The stop screw sets end position only; it is not a load lock.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50STC Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X120-50STC |
| 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 SAIJ80X120-50STC 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 SAIJ80X120-50STC 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 SIJ80X120-50STC
| 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 SIJ80X120-50STC Is Used
Variable Pitch Indexing
Allows on-site extend stroke tuning from 70 to 120mm to alter part pitch without swapping cylinders.
Adjustable Diverter Gate
Sets precise gate extension limits on-site to accommodate changing package widths on the line.
Variable Height Stops
Trims the extend position to catch different pallet heights, using the stop screw for field adjustment.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X120-50STC with the SAIJ80X120-50STC
To replace this discontinued model, map directly to the SAIJ80X120-50STC, keeping the 50mm adjust window and TC mounting accessory. If sizing both ways, the neighbouring 63mm bore yields 1559N push at 0.5MPa, while the 100mm bore yields 3927N push. Choose the 50mm adjust window when your extend stroke needs field tuning between 70-120mm. The built-in -S magnet supports legacy CS1-B/DS1-B switches (the SAIJ uses current switches). For strokes >=300mm, verify side-load limits to prevent rod binding. A plain cylinder drifts on air loss; for held loads use an external rod lock, pilot-operated check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X120-50STC
- ✓ 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 SIJ80X120-50STC FAQ
Yes, the SIJ80X120-50STC is discontinued. The exact drop-in replacement is the SAIJ80X120-50STC, sharing the same ISO 15552 interface, 80mm bore, 120mm stroke, 50mm adjust window, and G3/8 port.
The 80mm bore provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and 4523N at 0.9MPa. The external stop screw offers a 50mm adjust window, shortening the 120mm nominal extend stroke down to 70mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X120-50STC
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