This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X350-75S, 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 SIJ125X350-75S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X350-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X350-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X350-75S
- 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 SIJ125X350-75S
The AirTAC SIJ125X350-75S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 75mm on-site, giving a usable 275-350mm window from the 350mm nominal maximum. The direct replacement is the SAIJ125X350-75S, sharing the same interface, force, and mounting.
The stop screw sets the end position but is not a load lock; loads drift on air loss. For holding, use an external rod lock or the SAIL/BSAI variants. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-75S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X350-75S |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125X350-75S 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 SAIJ125X350-75S 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 SIJ125X350-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SIJ125X350-75S Is Used
Variable Stroke Pressing
Allows on-site extend stroke tuning up to 75mm to set precise contact pressure on varying workpiece heights without changing the cylinder.
Adjustable Diverter Arms
Accommodates changing package sizes on a line by trimming the extend stroke within the 275-350mm window to set exact divert positions.
Custom End-Stop Positioning
Sets exact mechanical end positions for pallet stops where nominal stroke requires field adjustment to match fixture tolerances.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-75S with the SAIJ125X350-75S
To replace the discontinued SIJ125X350-75S, order the direct replacement SAIJ125X350-75S, retaining the 350mm nominal stroke and 75mm adjust window. Choose the adjust window based on your maximum needed extend trim. Mounting interfaces (Basic, FA, LB, TC) reuse standard ISO 15552 dimensions. The -S magnet enables position sensing. For this 350mm stroke, verify side-load limits and use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X350-75S
- ✓ 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 SIJ125X350-75S FAQ
Yes, the SIJ125X350-75S is discontinued. The direct replacement is the SAIJ125X350-75S. It shares the same ISO 15552 interface, 125mm bore, 350mm stroke, 75mm adjust window, G1/2 port, and mounting options, but features an upgraded piston seal.
The external stop screw provides a 75mm adjust window, allowing the extend stroke to be shortened from the 350mm maximum down to 275mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X350-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X350-75S replacement — usually within 7-8 hours.