This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X30-30S, 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 SIJ125X30-30S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 30mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X30-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X30-30S
- 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 SIJ125X30-30S
The AirTAC SIJ125X30-30S 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 (usable 0-30 mm range), setting the exact end position without adding external stops. It features a 125 mm bore, G1/2 port, M27x2 rod thread, and 40 mm adjustable cushions. The direct replacement is the SAIJ125X30-30S, matching the interface, bore, force, and mounting.
The SAIJ successor retains these ratings but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets end position but is not a load lock; for held loads use SAIL/BSAI or an external rod lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X30-30S |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAIJ125X30-30S 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 SAIJ125X30-30S 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 SIJ125X30-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SIJ125X30-30S Is Used
Press Fit Tuning
Shorten the extend stroke on-site by up to 30 mm to dial in exact press-fit depths for bearings without swapping cylinders.
Transfer Stop Positioning
Adjust the stop screw to set precise 0-30 mm product halt positions on a conveyor line as package sizes change.
Pallet End-Locating
Fine-tune the extend end position to accommodate varying pallet widths, ensuring exact alignment before wrapping.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30S with the SAIJ125X30-30S
To replace the discontinued SIJ125X30-30S, order the direct replacement SAIJ125X30-30S. It preserves the 125 mm bore, 30 mm nominal stroke, 30 mm adjust window, G1/2 port, and ISO 15552 mounting. Choose the 30 mm adjust window when you need on-site extend trimming from 0 to 30 mm. Mounting options include FA, LB, and TC. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches. Because the nominal stroke is only 30 mm, side-load risks are minimal, but always verify rod alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X30-30S
- ✓ 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 SIJ125X30-30S FAQ
Yes, the SIJ125X30-30S is discontinued. The direct replacement is the SAIJ125X30-30S. It shares the same ISO 15552 interface, 125 mm bore, 30 mm stroke, 30 mm adjust window, G1/2 port, and mounting options, but features an upgraded piston seal.
The external stop screw allows you to trim the extend stroke by up to 30 mm on-site (usable 0-30 mm). The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X30-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X30-30S replacement — usually within 7-8 hours.