This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X300-40S, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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 SIJ80X300-40S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X300-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X300-40S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40S
The AirTAC SIJ80X300-40S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 260-300 mm stroke from the 300 mm nominal maximum. It features a 25 mm rod, G3/8 port, and 36 mm adjustable cushions. The direct replacement is the SAIJ80X300-40S, matching the interface, bore, force, and mounting.
The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure. The stop sets end position but is not a load lock; for held loads use SAIL or BSAI variants.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X300-40S |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80X300-40S 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 SAIJ80X300-40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SIJ80X300-40S Is Used
Variable Depth Forming
Sheet metal stamping presses requiring on-site stroke tuning to alter the forming depth by up to 40 mm without swapping cylinders.
Adjustable Transfer Stops
Packaging lines needing field stroke trimming to handle different carton lengths on the fly, using the 260-300 mm extend window.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40S with the SAIJ80X300-40S
To replace the SIJ80X300-40S, order the direct replacement SAIJ80X300-40S, reusing your existing ISO 15552 FA, LB, or TC mounts and G3/8 plumbing. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches; the SAIJ uses current switches. Choose the 40 mm adjust window if your extend target sits between 260 and 300 mm. Because the stroke is 300 mm, ensure external guides to prevent rod bending under side-load. The stop screw sets end position; it is not a lock, so add an external rod lock for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X300-40S
- ✓ 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 SIJ80X300-40S FAQ
Yes, the SIJ80X300-40S is discontinued. The direct replacement is the SAIJ80X300-40S. It shares the identical ISO 15552 interface, 80 mm bore, 300 mm stroke, 40 mm adjust window, G3/8 port, and mounting options. The SAIJ upgrade features an improved two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw provides a 40 mm adjust window, shortening the 300 mm extend stroke down to 260 mm. The stop sets end position and is not a load lock; add an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X300-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X300-40S replacement — usually within 7-8 hours.