This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X50-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X50-20S 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 SIJ80X50-20S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X50-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X50-20S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S
The AirTAC SIJ80X50-20S is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 50 mm nominal stroke. An external stop screw allows you to trim the extend stroke by up to 20 mm on-site, yielding a usable 30-50 mm extension. The exact drop-in replacement is the SAIJ80X50-20S, retaining the G3/8 port, M20x1.5 rod thread, and 36 mm adjustable cushions.
At 0.5 MPa this 80 mm bore generates 2513 N push and 2268 N pull force, peaking at 4523 N push at 0.9 MPa. The SAIJ upgrade utilizes an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. Computed buyer insight: a safe working load is roughly 1508 N (60% of the 0.5 MPa push), translating to a 128 kg vertical lift with a 2:1 margin. The stop screw sets the end position and is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X50-20S |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80X50-20S 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 SAIJ80X50-20S 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 SIJ80X50-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SIJ80X50-20S Is Used
Variable Stroke Clamping
Allows operators to fine-tune the extend position by up to 20 mm on-site to accommodate different workpiece thicknesses without changing the entire actuator setup.
Adjustable Transfer Pusher
Provides a 30-50 mm extend stroke to push varying product sizes off a line, using the external stop to set precise ejection distances.
Dynamic Sealing Press
Delivers 2513 N of push force at 0.5 MPa to seat lids, with the adjustability to alter the final crush depth for different container formats.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S with the SAIJ80X50-20S
To replace the discontinued SIJ80X50-20S, order the drop-in SAIJ80X50-20S, keeping the 50 mm max stroke, 20 mm adjust window, and -S piston magnet for legacy CS1-B/DS1-B switches. 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. Select the 20 mm adjust window if your field tuning only requires trimming the extend by up to 20 mm. Mounting options include FA, LB, and TC brackets. Because the 50 mm stroke is under 300 mm, side-load rod deflection is minimal. For load holding without live air, select an external rod lock or the SAIL variant, as the stop screw is not a brake.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X50-20S
- ✓ 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 SIJ80X50-20S FAQ
Yes, the SIJ80X50-20S is discontinued. The exact drop-in replacement is the SAIJ80X50-20S, which shares the identical ISO 15552 interface, 80 mm bore, 50 mm stroke, 20 mm adjust window, G3/8 port, and mounting options.
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 nominal 50 mm extend stroke can be shortened by up to 20 mm on-site via the external stop screw, yielding a 30-50 mm usable stroke. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X50-20S
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