This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X900-10S, 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 SIJ125X900-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X900-10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 900mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X900-10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X900-10S
- 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 SIJ125X900-10S
The AirTAC SIJ125X900-10S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 900 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 10 mm on-site, yielding a usable 890-900 mm window. The direct replacement is the SAIJ125X900-10S, matching the interface, force, and mounting.
The SAIJ successor retains ISO 15552 mounting reuse and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors. Remember the stop screw sets end position only; it is not a load lock, so use SAIL or an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X900-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X900-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X900-10S |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125X900-10S 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 SAIJ125X900-10S 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 SIJ125X900-10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SIJ125X900-10S Is Used
Long-Reach Forming Press
Needs field stroke tuning to dial the final 10 mm of extend contact on a 900 mm stroke, ensuring precise forming pressure without re-mounting the actuator.
High-Bay Stacker
Demands a 900 mm reach with a 10 mm on-site trim window to fine-tune the engagement depth, relying on external guides to support the long rod.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X900-10S with the SAIJ125X900-10S
To replace the discontinued SIJ125X900-10S, order the exact direct replacement SAIJ125X900-10S, which preserves the 900 mm stroke, 10 mm adjust window, G1/2 port, and FA/LB/TC mounting interfaces. Choose the 10 mm adjust window if you need minor on-site extend tuning. The -S magnet supports legacy CS1-B/DS1-B switches. Because the 900 mm stroke exceeds 300 mm, account for rod-bending and provide external guides to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X900-10S
- ✓ 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 SIJ125X900-10S FAQ
Yes, the SIJ125X900-10S is discontinued. The direct replacement is the SAIJ125X900-10S. It offers the same ISO 15552 interface, 125 mm bore, 900 mm stroke, 10 mm adjust window, G1/2 port, and mounting options, but features an upgraded piston seal.
The external stop screw provides a 10 mm adjust window, allowing you to trim the extend stroke from 900 mm down to 890 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X900-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X900-10S replacement — usually within 7-8 hours.