This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X125-100, 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 SIJ125X125-100
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X125-100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X125-100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X125-100
- 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 SIJ125X125-100
The AirTAC SIJ125X125-100 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 25-125 mm extension out of the 125 mm nominal maximum. The direct replacement is the SAIJ125X125-100, matching the interface, force, and adjust window.
The SAIJ successor retains the ISO 15552 mounting dimensions so your FA, LB, and TC brackets reuse directly, and it upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Because this SKU lacks the -S magnet option, it cannot accept a magnetic switch for position sensing. Note the external stop sets the end position but is not a load lock; on air loss the piston drifts, so use an external rod lock or the SAIL/BSAI variants for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-100 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X125-100 |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-100 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 SAIJ125X125-100 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 SIJ125X125-100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SIJ125X125-100 Is Used
Press Tonnage Calibration
Needs field stroke tuning to set precise lower dead center on varying workpiece heights, using the 100 mm adjust window to alter the extend endpoint without re-plumbing the G1/2 air lines.
Variable-Length Diverter
Requires adjustable extension to deflect different package sizes on a line, trimming the extend stroke by up to 100 mm on-site to accommodate profile changes without swapping the cylinder.
Adjustable Pallet Stopper
Demands on-site stroke trimming to halt pallets of varying depths accurately, using the external stop screw to set the 25-125 mm usable extend position while handling high kinetic energy via the 40 mm cushion.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-100 with the SAIJ125X125-100
To replace the discontinued SIJ125X125-100, order the direct replacement SAIJ125X125-100, keeping the same 125 mm bore, 125 mm nominal stroke, and 100 mm adjust window. The 100 mm adjust window is ideal if your extend stroke needs on-site tuning between 25 and 125 mm. Mounting interfaces (Basic, FA, LB, TC) are ISO 15552 standard. This non-magnetic SKU cannot take a reed switch; if you need position sensing, select an -S model. For strokes at or above 300 mm, verify your side-load limits to prevent guide bushing wear. The stop screw defines the end position but provides no load-holding capability.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X125-100
- ✓ 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 SIJ125X125-100 FAQ
Yes, the AirTAC SIJ125X125-100 is discontinued. The direct replacement is the SAIJ125X125-100.
The external stop screw provides a 100 mm adjust window, allowing you to shorten the 125 mm nominal extend stroke down to 25 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X125-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X125-100 replacement — usually within 7-8 hours.