This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X150-30S, 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 SIJ125X150-30S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X150-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X150-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X150-30S
- 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 SIJ125X150-30S
The AirTAC SIJ125X150-30S is a discontinued double-acting double-rod adjustable-stroke ISO 15552 cylinder. The external stop screw lets you trim the extend stroke by up to 30mm on-site (usable 120-150mm), setting the end position without adding external stops. The direct replacement is the SAIJ125X150-30S, matching the bore, force, adjust window, and mounting.
The SAIJ successor features an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. The stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-30S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X150-30S |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-30S 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 SAIJ125X150-30S 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 SIJ125X150-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SIJ125X150-30S Is Used
Press Fit Tuning
Field-trim the 150mm extend stroke by up to 30mm to set precise pressing depths for varying bearing housings without changing the cylinder.
Variable Divert Stops
Adjust the extend stop on-site to accommodate different package widths on a sorting line, ensuring exact contact points.
Pallet Positioning
Fine-tune the extend end position within the 120-150mm window to align pallets of varying dimensions before stretch wrapping.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-30S with the SAIJ125X150-30S
To replace the discontinued SIJ125X150-30S, order the direct replacement SAIJ125X150-30S, reusing your existing ISO 15552 FA, LB, or TC mounts. The 30mm adjust window allows field-tuning the extend stroke down to 120mm. Retain the -S magnet for position sensing. For stroke lengths of 300mm or more, verify side-load guidance to prevent rod deflection. The stop screw defines end position but does not hold loads on air loss; for load holding, select the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X150-30S
- ✓ 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 SIJ125X150-30S FAQ
Yes, the SIJ125X150-30S is discontinued. The direct replacement is the SAIJ125X150-30S. It shares the same ISO 15552 interface, 125mm bore, 150mm stroke, 30mm adjust window, G1/2 port, and mounting options, while adding an upgraded piston seal.
The external stop screw allows you to shorten the extend stroke by up to 30mm on-site, giving a usable extend range of 120-150mm. The stop sets position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X150-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X150-30S replacement — usually within 7-8 hours.