This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X500-10S, 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 SIJ125X500-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X500-10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X500-10S
- 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 SIJ125X500-10S
The AirTAC SIJ125X500-10S 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, yielding a usable 490-500 mm stroke (the 500 mm nominal is the maximum). The direct replacement is the SAIJ125X500-10S, retaining the same interface, port, and force.
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 the end position but is not a load lock; drift occurs on air loss, so use an external rod lock or SAIL/BSAI variant for holding. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X500-10S |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125X500-10S 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 SAIJ125X500-10S 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 SIJ125X500-10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SIJ125X500-10S Is Used
Press Fit Tuning
Trimming the final 10 mm of extend stroke on-site to set precise contact pressure without re-engineering the entire fixture position.
Divertor Gate Adjustment
Micro-adjusting the actuator end position to accommodate different package sizes on a sorting line without swapping the cylinder.
Pallet Stopper Calibration
Fine-tuning the extended stop position by up to 10 mm to handle slight pallet height variances before final locking.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10S with the SAIJ125X500-10S
To replace the discontinued SIJ125X500-10S, order the direct replacement SAIJ125X500-10S, matching the 125 mm bore, 500 mm stroke, 10 mm adjust window, G1/2 port, and -S magnet. Choose the 10 mm adjust window if you need micro-trimming of the extend end position. Mounting reuses ISO 15552 interface dimensions (Basic, FA, LB, TC). Because the 500 mm stroke is long, ensure external guides to prevent rod bending and side-load wear. The stop screw is for positioning only, not load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X500-10S
- ✓ 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 SIJ125X500-10S FAQ
Yes, the SIJ125X500-10S is discontinued. The direct replacement is the SAIJ125X500-10S. It shares the same ISO 15552 mounting interface, 125 mm bore, 500 mm stroke, 10 mm adjust window, G1/2 port, and force ratings, but adds an upgraded piston seal.
The external stop screw window is 10 mm, allowing you to shorten the extend stroke from 500 mm down to 490 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X500-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X500-10S replacement — usually within 7-8 hours.