This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X150-75S, 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 SIJ125X150-75S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X150-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X150-75S
- 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 SIJ125X150-75S
The AirTAC SIJ125X150-75S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 150 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 75-150 mm window. It features a G1/2 port, M27x2 rod thread, and 40 mm adjustable cushions. The direct replacement is the SAIJ125X150-75S, matching the bore, force, adjust window, and mounting interface.
Upgrading to the SAIJ brings an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B sensors. Remember the stop screw sets end position; it is not a load lock, so use an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X150-75S |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-75S 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 SAIJ125X150-75S 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 SIJ125X150-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SIJ125X150-75S Is Used
Variable Depth Forming
Sheet metal stamping presses needing on-site stroke tuning to accommodate different material thicknesses without swapping the entire actuator.
Adjustable Carton Sealing
End-of-line packaging stations handling varying box heights, using the 75 mm adjust window to set precise flap folding positions on the fly.
Tiered Pallet Positioning
Automated pallet handling where the extend stroke must be trimmed for different load heights, ensuring gentle contact without rigid hard-stops.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75S with the SAIJ125X150-75S
To replace the discontinued SIJ125X150-75S, order the exact direct replacement SAIJ125X150-75S to retain the 75 mm adjust window and 150 mm maximum stroke. Mounting attachments (FA, LB, TC) reuse the ISO 15552 interface directly. The -S magnet supports CS1-B/DS1-B switches. For strokes at or above 300 mm, verify side-load guide tolerances to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X150-75S
- ✓ 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 SIJ125X150-75S FAQ
Yes, the AirTAC SIJ125X150-75S is discontinued. The direct replacement is the SAIJ125X150-75S. It shares the identical ISO 15552 interface, 125 mm bore, 150 mm stroke, 75 mm adjust window, G1/2 port, and mounting options, while adding an upgraded piston seal.
The external stop screw provides a 75 mm trim window, making the usable extend stroke 75-150 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X150-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X150-75S replacement — usually within 7-8 hours.