This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X125-20, 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 SIJ80X125-20
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X125-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X125-20
- 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 SIJ80X125-20
The AirTAC SIJ80X125-20 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with an 80 mm bore and 125 mm maximum extend stroke. An external stop screw allows you to trim the extend stroke on-site by up to 20 mm, yielding a usable 105-125 mm range. The G3/8 port and 36 mm adjustable cushions govern a 30-800 mm/s speed range. As an end-of-life product, the direct replacement is the SAIJ80X125-20, retaining the same interface, 25 mm rod, M20x1.5 thread, and force characteristics.
The SAIJ successor incorporates an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Because this SKU lacks a -S magnet, it cannot accept legacy CS1-B/DS1-B switches. Note that the stop screw sets end position only; it is not a load lock, and the cylinder will drift without live air.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-20 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X125-20 |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAIJ80X125-20 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 SAIJ80X125-20 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 SIJ80X125-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SIJ80X125-20 Is Used
Press Fit Tuning
An assembly station uses the 20 mm adjust window to dial in the exact 115 mm extend position for pressing bearings, compensating for fixture variations on-site.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-20 with the SAIJ80X125-20
To replace the discontinued SIJ80X125-20, order the direct replacement SAIJ80X125-20, ensuring you reuse your existing FA, LB, or TC ISO 15552 mounts. The 20 mm adjust window is ideal if your end position requires precise on-site tuning between 105 and 125 mm. Because this non-magnetic SKU lacks a -S suffix, it cannot support position sensing. For strokes at or exceeding 300 mm, carefully manage side-load forces to prevent premature seal wear. If your application requires true load holding on air loss, select an external rod lock or the SAIL/BSAI variant, as the adjustable stop never functions as a brake.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X125-20
- ✓ 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 SIJ80X125-20 FAQ
Yes, the SIJ80X125-20 is discontinued.
The external stop screw provides a 20 mm adjust window, allowing you to shorten the 125 mm extend stroke down to 105 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X125-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X125-20 replacement — usually within 7-8 hours.