This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X70-40, 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 SIJ80X70-40
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X70-40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X70-40
- 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 SIJ80X70-40
The AirTAC SIJ80X70-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with an 80 mm bore and 70 mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 30-70 mm window. It features a Ø25 mm piston rod, a G3/8 air port, and 36 mm adjustable air cushions at each end. The direct replacement is the SAIJ80X70-40, matching the interface, bore, force, and mounting.
The SAIJ upgrade utilizes a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-S SKU lacks a magnet for sensing, and the stop screw sets end position but is not a load lock.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-40 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X70-40 |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80X70-40 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 SAIJ80X70-40 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 SIJ80X70-40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SIJ80X70-40 Is Used
Variable Stroke Forming
Adjusting the extend stroke on-site by up to 40 mm allows a single cylinder to press parts of varying heights without swapping the entire actuator assembly.
Adjustable Transfer Stops
Tuning the 30-70 mm extend window lets operators alter the stop position for different package sizes directly at the conveyor lane.
Customizable Ejector Pins
Trimming the extend stroke precisely controls the ejection distance of parts from a fixture, preventing over-travel on delicate components.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-40 with the SAIJ80X70-40
To replace the discontinued SIJ80X70-40, order the direct replacement SAIJ80X70-40, keeping the same 70 mm nominal stroke and 40 mm adjust window. Choose your mounting from Basic, FA, LB, or TC. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add the -S option if you need position sensing. The external stop screw sets the end position but is not a lock; for load holding on air loss, use an external rod lock or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X70-40
- ✓ 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 SIJ80X70-40 FAQ
Yes, the SIJ80X70-40 is discontinued. The direct replacement is the SAIJ80X70-40, offering the same ISO 15552 interface, 80 mm bore, 70 mm stroke, 40 mm adjust window, and G3/8 port.
The external stop screw allows trimming the extend stroke by up to 40 mm on-site, giving a usable 30-70 mm window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X70-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X70-40 replacement — usually within 7-8 hours.