This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X400-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X400-50S 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 SIJ80X400-50S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X400-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X400-50S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-50S
The AirTAC SIJ80X400-50S 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 350-400 mm window from the 400 mm nominal maximum. The 80 mm bore uses a G3/8 port, M20x1.5 rod thread, and 36 mm adjustable cushions, delivering 2513 N push and 2268 N pull at 0.5 MPa (4523 N push at 0.9 MPa). The exact drop-in replacement is the SAIJ80X400-50S, matching the ISO 15552 interface, force, and mounting.
The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. For sizing, the safe working load is roughly 1508 N (60% of the 0.5 MPa push), yielding a 128 kg vertical lift with a 2:1 margin. The -S suffix provides a 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 for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-50S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X400-50S |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAIJ80X400-50S 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 SAIJ80X400-50S 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 SIJ80X400-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SIJ80X400-50S Is Used
Variable Stroke Pressing
Field-tune the extend endpoint by up to 50 mm to press components of varying heights without swapping the entire cylinder.
Adjustable Diverter Arm
Reposition a sorting gate on-site by shortening the 400 mm stroke to accommodate changing package sizes on the line.
Custom Height Pallet Stops
Trim the extend stroke in the field to create precise stopping points for mixed pallet dimensions entering a wrapping station.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-50S with the SAIJ80X400-50S
To replace the discontinued SIJ80X400-50S, order the drop-in SAIJ80X400-50S, reusing your existing FA, LB, or TC ISO 15552 mounts. When sizing both ways, the neighboring 63 mm bore yields 2182 N push at 0.7 MPa, while the 100 mm bore yields 5497 N push at 0.7 MPa; this 80 mm bore gives 3518 N at 0.7 MPa. Choose the 50 mm adjust window if your field stroke tuning requires trimming the 400 mm extend down to 350 mm. The -S suffix ensures a piston magnet is present for switch sensing. Because the 400 mm stroke is long, account for side-load and rod-bending by using external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X400-50S
- ✓ 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 SIJ80X400-50S FAQ
Yes, the SIJ80X400-50S is discontinued. The exact drop-in replacement is the SAIJ80X400-50S. It shares the same ISO 15552 interface, 80 mm bore, 400 mm nominal stroke, 50 mm adjust window, G3/8 port, and mounting, but adds an upgraded piston seal.
The double-acting single-rod 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 window is 50 mm, allowing you to trim the 400 mm extend stroke down to 350 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
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