This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X350-100S, 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 SIJ125X350-100S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100S 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 SAIJ125X350-100S, 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 → SAIJ125X350-100S
- 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 SIJ125X350-100S
The AirTAC SIJ125X350-100S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125mm bore and 350mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 100mm on-site, yielding a usable 250-350mm extension window. The direct replacement is the SAIJ125X350-100S, retaining the same interface, force, and mounting.
The SAIJ successor incorporates an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets end position but is not a lock; for held loads use an external rod lock. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X350-100S |
| 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 SAIJ125X350-100S 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 SAIJ125X350-100S 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 SIJ125X350-100S
| 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 SIJ125X350-100S Is Used
Variable Stroke Pressing
Adjusting the extend stop on-site allows precise 250-350mm pressing of large components where exact material thickness varies between production batches.
Adjustable Diverter Arm
Trimming the extend stroke by up to 100mm accommodates changing package sizes on a sorting line without physically remounting the actuator assembly.
Variable Height Pallet Stop
Tuning the end position on-site provides flexible pallet indexing heights at a packing station before the 350mm maximum extend is reached.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100S with the SAIJ125X350-100S
To replace the discontinued SIJ125X350-100S, order the direct replacement SAIJ125X350-100S, which preserves the ISO 15552 mounting dimensions, G1/2 port, and 100mm adjust window. Choose the 100mm adjust window if your process requires trimming the 350mm extend stroke down to 250mm; otherwise, a smaller window minimizes stop-screw overhang. Mounting options include FA, LB, and TC brackets. The -S magnet enables position sensing. Because the 350mm stroke exceeds 300mm, verify side-load limits and use external guides to prevent rod bending. The stop screw sets end position only and does not hold loads on air loss; use SAIL or BSAI lock variants for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X350-100S
- ✓ 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 SIJ125X350-100S FAQ
Yes, the SIJ125X350-100S is discontinued. The direct replacement is the SAIJ125X350-100S. It shares the identical ISO 15552 interface, 125mm bore, 350mm stroke, 100mm adjust window, G1/2 port, and mounting options, while upgrading the piston seal to a two Y-shaped one-way element design.
The external stop screw provides a 100mm adjust window, allowing you to shorten the 350mm extend stroke down to 250mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X350-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X350-100S replacement — usually within 7-8 hours.