This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X500-100S, 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 SIJ125X500-100S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100S 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 SAIJ125X500-100S, 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 → SAIJ125X500-100S
- 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 SIJ125X500-100S
The AirTAC SIJ125X500-100S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 100 mm on-site, giving a usable 400-500 mm window from the 500 mm nominal maximum. The direct replacement is the SAIJ125X500-100S, matching the interface, force, and mounting.
The SAIJ successor retains the ISO 15552 mounting footprint for direct reuse of FA, LB, or TC brackets and upgrades to a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors. Remember the stop screw sets end position only; it is not a lock, so add an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X500-100S |
| 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 SAIJ125X500-100S 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 SAIJ125X500-100S 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 SIJ125X500-100S
| 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 SIJ125X500-100S Is Used
Variable Press Stroke
Trimming the extend stroke by up to 100 mm on-site allows a single 125 mm bore cylinder to accommodate multiple material thicknesses in a forming press without changing the entire actuator.
Adjustable Diverter Arm
A packaging line can fine-tune the 400-500 mm pusher travel window to handle different carton sizes, using the external stop screw to set the exact end position.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100S with the SAIJ125X500-100S
To replace the discontinued SIJ125X500-100S, order the direct replacement SAIJ125X500-100S, keeping the 500 mm nominal stroke, 100 mm adjust window, and -S magnet. Select the 100 mm adjust window when you need up to a 400 mm stroke reduction. Reuse FA, LB, or TC mounts via the ISO 15552 interface. For the 500 mm stroke, verify external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X500-100S
- ✓ 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 SIJ125X500-100S FAQ
Yes, the SIJ125X500-100S is discontinued. The direct replacement is the SAIJ125X500-100S. It shares the same ISO 15552 interface, 125 mm bore, 500 mm stroke, 100 mm adjust window, G1/2 port, and mounting options, but adds an upgraded two-piece Y-shaped piston seal.
The external stop screw window is 100 mm, allowing you to shorten the 500 mm nominal extend stroke down to 400 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X500-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X500-100S replacement — usually within 7-8 hours.