This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X25-30S, 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 SIJ125X25-30S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X25-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X25-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X25-30S
- 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 SIJ125X25-30S
The AirTAC SIJ125X25-30S 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 30 mm on-site, giving a usable 0-25 mm extend out of the 25 mm nominal maximum. The direct replacement is the SAIJ125X25-30S, retaining the same interface, force, and porting.
The SAIJ successor incorporates an upgraded piston seal utilizing two Y-shaped one-way elements for lower start-up pressure and extended life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Remember the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X25-30S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X25-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X25-30S |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAIJ125X25-30S 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 SAIJ125X25-30S 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 SIJ125X25-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SIJ125X25-30S Is Used
Press Fit Tuning
Allows precise on-site adjustment of the extend stroke for pressing bearings, ensuring exact insertion depth without changing the cylinder body.
Diverter Gate Positioning
Provides adjustable reach for sorting gates on conveyors, enabling quick changes to the divert endpoint to handle varying package sizes.
Pallet Stop Height
Offers field-tuned stopping points for pallet handling systems, allowing operators to dial in the exact extend position for different pallet thicknesses.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X25-30S with the SAIJ125X25-30S
To replace the discontinued SIJ125X25-30S, order the direct replacement SAIJ125X25-30S, maintaining the ISO 15552 mounting interface and G1/2 port. The 30 mm adjust window allows field tuning of the 25 mm extend stroke. Mounting options include Basic, FA, LB, and TC. The -S magnet supports legacy CS1-B/DS1-B switches. For strokes >=300 mm, verify side-load limits to prevent guide failure.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X25-30S
- ✓ 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 SIJ125X25-30S FAQ
Yes, the SIJ125X25-30S is discontinued. The direct replacement is the SAIJ125X25-30S. It shares the same ISO 15552 interface, 125 mm bore, 25 mm stroke, 30 mm adjust window, G1/2 port, and mounting options, but features an upgraded piston seal.
The external stop screw window is 30 mm, allowing you to trim the extend stroke on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X25-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X25-30S replacement — usually within 7-8 hours.