This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X400-40S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X400-40S 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 SIJ80X400-40S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-40S 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 SAIJ80X400-40S, 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 → SAIJ80X400-40S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-40S
The AirTAC SIJ80X400-40S is a double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 400 mm nominal stroke and a 40 mm external stop screw window, allowing you to trim the extend stroke on-site down to 360 mm. This 80 mm bore features a G3/8 port, M20x1.5 rod thread, and 36 mm adjustable air cushions. It delivers 2513 N push and 2268 N pull at 0.5 MPa, reaching 4523 N at 0.9 MPa. The SIJ80X400-40S is discontinued; the exact drop-in replacement is the SAIJ80X400-40S, sharing the same interface, force, and mounting.
The SAIJ upgrade introduces an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. For sizing, a computed buyer insight from the 0.5 MPa push force yields a safe working load of roughly 1508 N (60% of 2513 N), translating to 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, pilot-operated check valve, or the SAIL/BSAI lock variants. This -S model includes a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-40S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X400-40S |
| 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 SAIJ80X400-40S 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 SAIJ80X400-40S 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 SIJ80X400-40S
| 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 SIJ80X400-40S Is Used
Variable Depth Boring
Needs field stroke tuning to dial in precise extend endpoints between 360 and 400 mm during multi-stage boring operations without swapping cylinders.
Adjustable Diverter Arm
Requires on-site stroke trimming to accommodate different package sizes on the fly, using the 40 mm stop screw to alter the push reach.
Variable Height Indexing
Demands adjustable extend positioning to index pallets of varying heights, fine-tuning the 400 mm stroke exactly where the load stops.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-40S with the SAIJ80X400-40S
To replace the discontinued SIJ80X400-40S, order the drop-in SAIJ80X400-40S, which preserves the 80 mm bore, 400 mm stroke, 40 mm adjust window, G3/8 port, and ISO 15552 mounting. 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; choose based on your exact force requirement. Select the 40 mm adjust window if your end-position tuning falls between 360 and 400 mm. Mounting options include Basic, FA, LB, and TC. The -S suffix ensures a piston magnet is present for legacy CS1-B/DS1-B sensors (the SAIJ uses current AirTAC switches). Because the 400 mm stroke is long, verify side-load limits, rod-bending forces, and use external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X400-40S
- ✓ 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 SIJ80X400-40S FAQ
Yes, the SIJ80X400-40S is discontinued. The exact drop-in replacement is the SAIJ80X400-40S. It shares the same ISO 15552 interface, 80 mm bore, 400 mm stroke, 40 mm adjust window, G3/8 port, and mounting. The SAIJ family also adds an upgraded piston seal and SAIL/BSAI lock variants.
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 external stop screw window is 40 mm, allowing you to shorten the 400 mm extend stroke down to 360 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
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