This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X225-20, 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 SIJ125X225-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X225-20 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 SAIJ125X225-20, 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 → SAIJ125X225-20
- 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 SIJ125X225-20
The AirTAC SIJ125X225-20 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 20 mm on-site, yielding a usable 205-225 mm extend window from the 225 mm nominal maximum.
The direct replacement is the SAIJ125X225-20, preserving the ISO 15552 mounting interface, bore, and force. The SAIJ upgrade introduces 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—it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X225-20 |
| 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 SAIJ125X225-20 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 SAIJ125X225-20 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 SIJ125X225-20
| 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 SIJ125X225-20 Is Used
Press Fit Tuning
Finalizing pin insertion depth on an assembly line, where the 20 mm on-site adjust window dials in the exact 205-225 mm extend position without re-mounting the actuator.
Variable Depth Sealing
Applying container lids on a packaging conveyor, allowing operators to shorten the extend stroke by up to 20 mm to accommodate varying fill heights.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-20 with the SAIJ125X225-20
To replace the discontinued SIJ125X225-20, order the direct replacement SAIJ125X225-20 to reuse your existing ISO 15552 FA, LB, or TC mounts. Choose the 20 mm adjust window if your end-position tuning falls within 205-225 mm. Because this SKU lacks the -S magnet, it cannot accept a legacy CS1-B or DS1-B sensor; confirm if you need sensing. For this 225 mm stroke, side-load is minimal, but for strokes >=300 mm ensure guide alignment to prevent rod binding. The stop screw only sets end position; for load holding on air loss, specify an external rod lock, pilot-operated check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X225-20
- ✓ 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 SIJ125X225-20 FAQ
Yes, the SIJ125X225-20 is discontinued. The SAIJ features an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw provides a 20 mm trim window, making the usable extend stroke 205-225 mm. It uses a G1/2 port and operates at 30-500 mm/s. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X225-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X225-20 replacement — usually within 7-8 hours.