This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X225-75, 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 SIJ125X225-75
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X225-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 225mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X225-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X225-75
- 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 SIJ125X225-75
The AirTAC SIJ125X225-75 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 75mm on-site, giving a usable 150-225mm window. The direct replacement is the SAIJ125X225-75, matching the G1/2 port, M27x2 rod thread, and 40mm cushions.
Upgrading to the SAIJ family retains the ISO 15552 mounting interface for hardware reuse while adding an upgraded two-piece Y-shaped piston seal for lower start-up pressure. This SKU lacks a -S magnet and cannot accept sensors. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X225-75 |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125X225-75 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 SAIJ125X225-75 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 SIJ125X225-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SIJ125X225-75 Is Used
Press Fit Tuning
Dial in exact insertion depths on heavy press operations by trimming the extend stroke up to 75mm on-site.
Divert Arm Positioning
Adjust the extend stop to alter package routing distances without changing out the entire actuator assembly.
Pallet Stop Calibration
Fine-tune the end position to accommodate varying pallet widths on a 125mm bore ISO 15552 line.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-75 with the SAIJ125X225-75
To replace the discontinued SIJ125X225-75, order the direct replacement SAIJ125X225-75 to reuse existing FA, LB, or TC mounts. The 75mm adjust window is ideal for field tuning the 225mm nominal stroke down to 150mm without machining. Because this SKU has no -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For strokes of 300mm or longer, carefully manage side-load forces to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X225-75
- ✓ 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 SIJ125X225-75 FAQ
Yes, the SIJ125X225-75 is discontinued. The direct replacement is the SAIJ125X225-75, which shares the same ISO 15552 interface, 225mm stroke, 75mm adjust window, and G1/2 port.
The external stop screw shortens the extend stroke by up to 75mm, yielding a 150-225mm usable window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X225-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X225-75 replacement — usually within 7-8 hours.