This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X75-30S, 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 SIJ125X75-30S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X75-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X75-30S
- 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 SIJ125X75-30S
The AirTAC SIJ125X75-30S is a discontinued double-acting, double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and a 75 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 45-75 mm end position. The stop sets the end position and is not a load lock. The direct replacement is the SAIJ125X75-30S.
The SAIJ successor retains the same ISO 15552 mounting interface, force, and adjust window, but upgrades to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The SAI family also adds lock variants (SAIL, BSAI) absent in the SI line. A plain cylinder drifts on air loss; use an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X75-30S |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125X75-30S 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 SAIJ125X75-30S 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 SIJ125X75-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SIJ125X75-30S Is Used
Press Fit Tuning
Allows precise 45-75 mm extend adjustment for pressing bearings, ensuring exact insertion depth without remounting the actuator.
Variable Format Sealing
Adjusts the extend stop on the fly to accommodate different carton heights, trimming up to 30 mm to avoid crushing the container.
Positional Diverter Stop
Sets a specific product halt point along a belt, tuning the extend stroke on-site to handle varying package widths accurately.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30S with the SAIJ125X75-30S
To replace the discontinued SIJ125X75-30S, order the SAIJ125X75-30S, keeping the -S magnet for current AirTAC switches. Choose the 30 mm adjust window if your end position needs 45-75 mm of on-site tuning. Mounting reuses ISO 15552 interface dimensions (FA, LB, TC). Speed is 30-500 mm/s. For strokes >=300 mm, verify side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X75-30S
- ✓ 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 SIJ125X75-30S FAQ
Yes, the SIJ125X75-30S is discontinued. The direct replacement is the SAIJ125X75-30S, offering the same ISO 15552 interface, 125 mm bore, 75 mm stroke, 30 mm adjust window, and G1/2 port.
The external stop screw window is 30 mm, allowing you to trim the extend stroke from 75 mm down to 45 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X75-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X75-30S replacement — usually within 7-8 hours.