This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X40-10S, 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 SIJ125X40-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X40-10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X40-10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X40-10S
- 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 SIJ125X40-10S
The AirTAC SIJ125X40-10S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the direct replacement SAIJ125X40-10S. It features a 125 mm bore, G1/2 port, and an external stop screw that lets you trim the extend stroke by up to 10 mm on-site (yielding a 30-40 mm usable extend length). The nominal 40 mm stroke is the maximum. The stop sets the end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads.
The SAIJ upgrade retains the exact interface and force but adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X40-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X40-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X40-10S |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAIJ125X40-10S 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 SAIJ125X40-10S 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 SIJ125X40-10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SIJ125X40-10S Is Used
Press Fit Tuning
Dialing in the exact insertion depth of a bearing or pin where a fixed 40 mm stroke overshoots, using the 10 mm on-site stop screw window to prevent fixture damage.
Carton Flap Folding
Adjusting the extend endpoint on the fly to accommodate varying package heights without swapping the cylinder, ensuring the folding arm hits the correct flap position.
End-of-Stroke Dampening Setup
Setting a precise mechanical stop for a heavy 313 kg vertical lift fixture, allowing the external screw to absorb the final impact energy before the 40 mm cushion zone.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X40-10S with the SAIJ125X40-10S
To replace the discontinued SIJ125X40-10S, order the direct replacement SAIJ125X40-10S, which matches the 125 mm bore, 40 mm nominal stroke, 10 mm adjust window, G1/2 port, and ISO 15552 mounting. Choose the 10 mm adjust window when you need precise field tuning of the extend endpoint. Mounting options include Basic, FA, LB, and TC. The -S suffix ensures a piston magnet is present for sensing. For strokes >=300 mm, verify the side-load capacity to prevent guide bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X40-10S
- ✓ 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 SIJ125X40-10S FAQ
Yes, the SIJ125X40-10S is discontinued. The direct replacement is the SAIJ125X40-10S. It shares the identical ISO 15552 interface, 125 mm bore, 40 mm stroke, 10 mm adjust window, G1/2 port, and mounting, but uses an upgraded piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 10 mm on-site, giving a 30-40 mm usable extend range. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X40-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X40-10S replacement — usually within 7-8 hours.