This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X370-20S, 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 SIJ80X370-20S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X370-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 370mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X370-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke370 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X370-20S
- 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 SIJ80X370-20S
The AirTAC SIJ80X370-20S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and superseded by the direct replacement SAIJ80X370-20S. It features an 80 mm bore, a 25 mm piston rod, and a G3/8 port. The external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable extend range of 350-370 mm. The nominal 370 mm stroke is the maximum. The SAIJ replacement reuses the exact ISO 15552 mounting interface, port, and adjust window.
Upgrading to the SAIJ family brings an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The stop screw 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. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X370-20S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X370-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X370-20S |
| Bore size | Ø80 mm |
| Stroke | 370 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 SAIJ80X370-20S 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 SAIJ80X370-20S 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 SIJ80X370-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×370 | 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 SIJ80X370-20S Is Used
Press Fit Tuning
Allows precise 350-370 mm extend adjustment for pressing bearings, ensuring exact insertion depth without re-engineering the entire fixture.
Divertor Positioning
Dial in the exact extend stop on-site to align a diverting gate perfectly with varying product widths on the line.
Carton Forming Stops
Adjust the extend end-position by up to 20 mm to accommodate different carton depths while maintaining consistent forming pressure.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X370-20S with the SAIJ80X370-20S
To replace the discontinued SIJ80X370-20S, order the direct replacement SAIJ80X370-20S, which preserves the 80 mm bore, 370 mm stroke, 20 mm adjust window, G3/8 port, and ISO 15552 mounting. Choose the 20 mm adjust window if your end-position tuning falls within a 350-370 mm extend range. Mounting options include Basic, FA, LB, and TC. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches; the SAIJ replacement uses current AirTAC switches. Because the 370 mm stroke exceeds 300 mm, account for side-load and rod-bending forces by using external guides to prevent premature wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X370-20S
- ✓ 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 SIJ80X370-20S FAQ
Yes, the SIJ80X370-20S is discontinued. The direct replacement is the SAIJ80X370-20S. It shares the same ISO 15552 interface, 80 mm bore, 370 mm stroke, 20 mm adjust window, G3/8 port, and mounting options, but features an upgraded piston seal.
The external stop screw window is 20 mm, allowing you to trim the extend stroke from the 370 mm maximum down to 350 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X370-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X370-20S replacement — usually within 7-8 hours.