This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X275-50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X275-50S 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 SIJ80X275-50S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X275-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X275-50S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50S
The AirTAC SIJ80X275-50S is a discontinued double-acting, single-rod ISO 15552 adjustable-stroke cylinder. A G3/8 port and 25mm rod deliver 2513N push and 2268N pull at 0.5MPa. The external stop screw lets you trim the extend stroke by up to 50mm on-site, yielding a 225-275mm usable window from the 275mm nominal maximum. The exact drop-in replacement is the SAIJ80X275-50S, matching the ISO 15552 mounting interface, bore, force, and cushioning.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. It also adds SAIL and BSAI lock variants absent in the SI line. Computed buyer insight: safe working load is ~1508N (60% of the 0.5MPa push), enabling a ~128kg vertical lift with a 2:1 margin. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. 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 SIJ80X275-50S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X275-50S |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80X275-50S 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 SAIJ80X275-50S 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 SIJ80X275-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SIJ80X275-50S Is Used
Press Fit Tuning
Dialing in bearing insertion depth on an assembly line, where the 50mm stop window allows operators to fine-tune the 275mm extend endpoint for varying housing tolerances without reprogramming the machine.
Variable Length Diverter
Actuating a sorting gate where product lengths change frequently; the external screw provides rapid 225-275mm stroke adjustments to accommodate different carton sizes on the fly.
Adjustable Sealing Head
Driving a packaging flap folder that requires precise end-position control for different box heights, using the stop screw to set a firm, repeatable mechanical limit rather than relying solely on valve timing.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50S with the SAIJ80X275-50S
To replace the discontinued SIJ80X275-50S, order the drop-in SAIJ80X275-50S, which preserves the G3/8 port, M20x1.5 rod thread, and 36mm adjustable cushions. Size both ways using 0.5MPa push force: step down to a 63mm bore (1559N) for lighter loads, or up to a 100mm bore (3927N) if you need more thrust. The 50mm adjust window is ideal for dialing in the exact 225-275mm extend endpoint without machining external stops. Reuse existing FA, LB, or TC ISO 15552 mounts. The -S magnet enables position sensing; note that at 275mm stroke, side-load alignment must be precise to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X275-50S
- ✓ 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 SIJ80X275-50S FAQ
Yes, the SIJ80X275-50S is discontinued. The exact drop-in replacement is the SAIJ80X275-50S. It shares the same ISO 15552 interface, 80mm bore, 275mm stroke, 50mm adjust window, G3/8 port, and mounting options, while upgrading the piston seal to two Y-shaped one-way elements for longer life.
The 80mm bore provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and 4523N at 0.9MPa (theoretical max 513kgf at 1.0MPa). The external stop screw allows you to trim the extend stroke by up to 50mm on-site, creating a 225-275mm usable window. Note that the stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
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