This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X350-10S, 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 SIJ125X350-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X350-10S 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 SAIJ125X350-10S, 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 → SAIJ125X350-10S
- 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 SIJ125X350-10S
The AirTAC SIJ125X350-10S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 10 mm on-site, giving a usable 340-350 mm window from the 350 mm nominal maximum. The direct replacement is the SAIJ125X350-10S, sharing the same interface, force, and mounting.
The stop screw sets the end position but is not a load lock; the piston drifts on air loss and the 40 mm adjustable cushions only decelerate near stroke end. For held loads use an external rod lock or pilot-operated check valve. The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X350-10S |
| 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 SAIJ125X350-10S 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 SAIJ125X350-10S 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 SIJ125X350-10S
| 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 SIJ125X350-10S Is Used
Press Fit Tuning
Trimming the extend stroke by up to 10 mm on-site allows precise bottoming force for press-fitting bearings without machining custom spacers.
Transfer Stop Positioning
Adjusting the 340-350 mm extend stop accommodates varying pallet widths on a transfer line, ensuring exact physical contact at end-of-stroke.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-10S with the SAIJ125X350-10S
To replace the discontinued SIJ125X350-10S, order the direct replacement SAIJ125X350-10S; it preserves the 10 mm adjust window, G1/2 port, and ISO 15552 mounting interfaces (Basic, FA, LB, TC). The 10 mm adjust window is ideal for fine-tuning the 340-350 mm extend position without shims. Retain your FA, LB, or TC mounts. The -S magnet supports CS1-B/DS1-B sensors (current AirTAC switches on the SAIJ). For the 350 mm stroke, verify side-load limits and use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X350-10S
- ✓ 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 SIJ125X350-10S FAQ
Yes, the SIJ125X350-10S is discontinued. The direct replacement is the SAIJ125X350-10S. It shares the same ISO 15552 interface, 125 mm bore, 350 mm stroke, 10 mm adjust window, G1/2 port, and mounting options. The SAIJ features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 10 mm adjust window, allowing you to shorten the 350 mm extend stroke down to 340 mm. The stop sets end position and is not a load lock; use an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X350-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X350-10S replacement — usually within 7-8 hours.