This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X125-40S, 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X125-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X125-40S
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S
The AirTAC SIJ125X125-40S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the SAIJ125X125-40S. It features a 125 mm bore, G1/2 port, M27x2 rod thread, and a 40 mm external stop screw window, letting you trim the extend stroke on-site from the 125 mm maximum down to 85 mm. The stop sets the end position but is not a load lock.
The SAIJ direct replacement retains the exact ISO 15552 mounting interface, bore, and force, while upgrading to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. This -S model includes a piston magnet for legacy CS1-B/DS1-B switches. For load holding without live air, use an external rod lock or the SAIL/BSAI variants, as cushions only decelerate.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X125-40S |
| Bore size | Ø125 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ125X125-40S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAIJ125X125-40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S Is Used
Press Fit Tuning
Allows operators to dial in the exact 85-125 mm extend position for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjusts the extend stop on-site to deflect varying package sizes on a sorting line, ensuring positive contact.
Adjustable Height Stops
Sets precise mechanical end positions for pallet lifting stages where the exact load height varies between runs.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S with the SAIJ125X125-40S
To replace the discontinued SIJ125X125-40S, specify SAIJ125X125-40S for a direct swap. Choose the 40 mm adjust window if your application requires field tuning the extend stroke between 85 mm and 125 mm. Mounting options include Basic, FA, LB, and TC using the ISO 15552 interface. The -S suffix ensures a piston magnet is present for legacy CS1-B/DS1-B switches (current AirTAC switches are used on the SAIJ). For strokes at or above 300 mm, verify side-load limits to prevent excessive guide wear. Operating speed is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X125-40S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-40S FAQ
Yes, the SIJ125X125-40S is discontinued. The direct replacement is the SAIJ125X125-40S, which shares the same ISO 15552 interface, 125 mm bore, 125 mm stroke, 40 mm adjust window, G1/2 port, and force ratings, but features an upgraded piston seal.
The external stop screw provides a 40 mm adjust window, allowing the extend stroke to be shortened on-site from the 125 mm maximum down to 85 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X125-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X125-40S replacement — usually within 7-8 hours.