This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X225-30, 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 SIJ125X225-30
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X225-30 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 SAIJ125X225-30, 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 → SAIJ125X225-30
- 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 SIJ125X225-30
The AirTAC SIJ125X225-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 225 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 195-225 mm extend window. The direct replacement is the SAIJ125X225-30, matching the interface, force, and mounting.
The SAIJ upgrade utilizes an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot accept position sensors. The stop screw sets end position but is not a lock; use SAIL or BSAI for load holding.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X225-30 |
| 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 SAIJ125X225-30 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 SAIJ125X225-30 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 SIJ125X225-30
| 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 SIJ125X225-30 Is Used
Press Fit Tuning
Allows on-site extend stroke adjustment up to 30 mm to set precise pressing depths for varying bearing housings without changing the cylinder.
Variable Length Diverter
Adjusts the extend position on a packaging line diverter to accommodate different carton lengths on the fly using the external stop screw.
Adjustable End Stop
Provides a field-tunable end position for pallet lifting or positioning fixtures where the exact stop point must be dialed in during commissioning.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-30 with the SAIJ125X225-30
To replace the discontinued SIJ125X225-30, order the direct replacement SAIJ125X225-30 to reuse your ISO 15552 mounts and G1/2 port. Choose the 30 mm adjust window when you need precise 195-225 mm extend tuning. Mounting options include FA, LB, and TC. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B or DS1-B sensors. For strokes of 300 mm or longer, verify side-load guidance to prevent rod binding. The stop screw sets end position and is not a load lock; for held loads, specify an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X225-30
- ✓ 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 SIJ125X225-30 FAQ
Yes, the SIJ125X225-30 is discontinued. The direct replacement is the SAIJ125X225-30, offering the same ISO 15552 interface, 125 mm bore, 225 mm stroke, 30 mm adjust window, G1/2 port, and mounting compatibility.
The external stop screw allows trimming the extend stroke by up to 30 mm on-site, giving a usable extend range of 195-225 mm. Note the stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X225-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X225-30 replacement — usually within 7-8 hours.