This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X40-30SN, 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 SIJ80X40-30SN
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-30SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X40-30SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X40-30SN
- 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 SIJ80X40-30SN
The AirTAC SIJ80X40-30SN is a discontinued double-acting, double-rod ISO 15552 adjustable-stroke cylinder with a 40 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a 10-40 mm usable end position. The 80 mm bore features a G3/8 port, M20x1.5 rod thread, and 36 mm adjustable cushions. The direct replacement is the SAIJ80X40-30SN, retaining the exact bore, force, adjust window, and mounting interface.
The SAIJ upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note that the external stop sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock or SAIL/BSAI variant for held loads. This -SN unit includes a piston magnet for legacy CS1-B/DS1-B sensors and NBR seals rated for -20 to +70 C.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-30SN Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-30SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X40-30SN |
| Bore size | Ø80 mm |
| Stroke | 40 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 SAIJ80X40-30SN 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 SAIJ80X40-30SN 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 SIJ80X40-30SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×40 | 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 SIJ80X40-30SN Is Used
Press Fit Tuning
Allows operators to dial in the exact 10-40 mm extend position for seating bearings without swapping mechanical spacers.
Variable Transfer Stops
Adjusts the extend stop on the fly to accommodate different package widths on a single sorting line.
Prototype Actuation
Provides a 30 mm trim window to test various end-of-stroke positions during fixture development before finalizing a fixed stroke.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-30SN with the SAIJ80X40-30SN
To replace the discontinued SIJ80X40-30SN, order the SAIJ80X40-30SN (direct, same ISO 15552 mounting interface). Choose the 30 mm adjust window if your application requires on-site tuning of the extend stroke between 10 and 40 mm. Mounting options include Basic, FA, LB, and TC. The -S suffix confirms a built-in magnet for position sensing, and the -N suffix specifies NBR seals. Because the stroke is under 300 mm, side-load concerns are minimal. Remember, the stop screw defines the end position but does not lock the load; for load-holding without live air, specify an external rod lock or a SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X40-30SN
- ✓ 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 SIJ80X40-30SN FAQ
Yes, the SIJ80X40-30SN is discontinued. The direct replacement is the SAIJ80X40-30SN, which shares the same ISO 15552 interface, 80 mm bore, 40 mm stroke, 30 mm adjust window, G3/8 port, and mounting options. The SAIJ family also features an upgraded two-piece Y-shaped piston seal.
The theoretical max is 513 kgf at 1.0 MPa. The external stop screw provides a 30 mm adjust window, allowing you to shorten the 40 mm nominal extend stroke down to 10 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X40-30SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X40-30SN replacement — usually within 7-8 hours.