This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X250-10, 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 SIJ125X250-10
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X250-10, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X250-10
- 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 SIJ125X250-10
The AirTAC SIJ125X250-10 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 240-250 mm extension out of the 250 mm nominal maximum.
The direct replacement is the SAIJ125X250-10, matching the ISO 15552 mounting interface, force, and adjust window. The SAIJ upgrade utilizes a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X250-10 |
| Bore size | Ø125 mm |
| Stroke | 250 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 SAIJ125X250-10 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 SAIJ125X250-10 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 SIJ125X250-10
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SIJ125X250-10 Is Used
Press Fit Calibration
Fine-tune the 10 mm extend window on-site to dial in exact bearing seating force without re-mounting the cylinder.
Package Diverter Stop
Adjust the end position by a few millimeters to accommodate varying box sizes on a 125 mm bore diverter arm.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10 with the SAIJ125X250-10
To replace the discontinued SIJ125X250-10, order the direct replacement SAIJ125X250-10 to reuse your existing ISO 15552 FA, LB, or TC mounts. The 10 mm adjust window is ideal for final positioning tweaks. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For stroke lengths of 300 mm or more, verify side-load tolerance to prevent guide wear. Remember the adjust screw is not a lock; for held loads use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X250-10
- ✓ 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 SIJ125X250-10 FAQ
Yes, the SIJ125X250-10 is discontinued. The direct replacement is the SAIJ125X250-10, which matches the ISO 15552 interface, 250 mm stroke, 10 mm adjust window, and G1/2 port.
The external stop screw provides a 10 mm trim window (usable extend 240-250 mm), but it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X250-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X250-10 replacement — usually within 7-8 hours.