This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X400-75 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X400-75 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 SIJ80X400-75
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75 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 SAIJ80X400-75, 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 → SAIJ80X400-75
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75
The AirTAC SIJ80X400-75 is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 400 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 325-400 mm window. The 80 mm bore uses a G3/8 port, a Ø25 mm rod with an M20x1.5 thread, and 36 mm adjustable air cushions at each end. It delivers 2513 N push and 2268 N pull at 0.5 MPa, operating at 30-800 mm/s.
As this SIJ model is end-of-life, the exact drop-in replacement is the SAIJ80X400-75, matching the ISO 15552 interface, bore, force, port, and mounting. The SAIJ family features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Computed buyer insight: safe working load is roughly 1508 N (60% of the 2513 N push at 0.5 MPa), translating to a 128 kg vertical lift with a 2:1 margin. The stop screw sets end position but is not a load lock; for held loads use an external rod lock or SAIL/BSAI variant.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X400-75 |
| 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 SAIJ80X400-75 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 SAIJ80X400-75 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 SIJ80X400-75
| 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 SIJ80X400-75 Is Used
Variable Stroke Pressing
Tuning a 325-400 mm extend stroke on-site to press components of varying heights without swapping the entire cylinder.
Adjustable Length Diverters
Trimming the extend stroke by up to 75 mm to accommodate different package sizes on a packaging line.
Variable Height Indexing
Stopping a 400 mm stroke early at precise positions to index pallets of differing heights.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75 with the SAIJ80X400-75
To replace the discontinued SIJ80X400-75, order the drop-in SAIJ80X400-75, which preserves the ISO 15552 mounting-interface dimensions, G3/8 port, and 75 mm adjust window. To size both ways, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N push. Choose the 75 mm adjust window if you need to tune the extend stroke down to 325 mm on-site. Reuse FA, LB, or TC mounts directly. This SKU lacks the -S magnet and cannot take a magnetic switch. For the 400 mm stroke, add external guides to prevent rod bending and manage side loads. The stop screw only sets end position; it is not a lock, so use a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X400-75
- ✓ 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 SIJ80X400-75 FAQ
Yes, the SIJ80X400-75 is discontinued. The exact drop-in replacement is the SAIJ80X400-75, offering the same ISO 15552 interface, 80 mm bore, 400 mm stroke, 75 mm adjust window, and G3/8 port. The SAIJ family also uses an upgraded piston seal for longer life.
The 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. The external stop screw window is 75 mm, allowing the extend stroke to be shortened from the 400 mm maximum down to 325 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
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