This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X125-75, 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 SIJ125X125-75
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X125-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X125-75
- 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 SIJ125X125-75
The AirTAC SIJ125X125-75 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 75 mm on-site, yielding a usable 50-125 mm stroke. The direct replacement is the SAIJ125X125-75, matching the G1/2 port, M27x2 rod thread, and 40 mm cushion. The stop sets end position only; it is not a load lock.
The SAIJ successor uses an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnetic SKU cannot take a switch. A plain cylinder drifts on air loss; for held loads use an external rod lock or SAIL/BSAI variant.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X125-75 |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-75 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 SAIJ125X125-75 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 SIJ125X125-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SIJ125X125-75 Is Used
Press Fit Tuning
Adjust the extend stop by up to 75 mm on-site to dial in precise press-fit depths for large bearings without swapping cylinders.
Variable Transfer Stops
Field-tune the 50-125 mm extend stroke to act as a height-specific physical stop for varying pallet sizes on a heavy conveyor line.
Adjustable Forming Dies
Shift the external stop screw to modify the extend end-position for different carton forming depths, ensuring exact packaging dimensions.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75 with the SAIJ125X125-75
Replace the SIJ125X125-75 directly with the SAIJ125X125-75, reusing your existing ISO 15552 FA, LB, or TC mounts without machining. The 75 mm adjust window lets you tune the extend end-position on-site, but remember the stop screw is not a brake. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For strokes of 300 mm or longer, verify your side-load limits to prevent rod distortion. The stop screw sets end position only; it does not hold loads on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X125-75
- ✓ 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 SIJ125X125-75 FAQ
Yes, the SIJ125X125-75 is discontinued. The direct replacement is the SAIJ125X125-75, which shares the identical ISO 15552 interface, 125 mm bore, 125 mm stroke, 75 mm adjust window, G1/2 port, and mounting options. The SAIJ also features an upgraded piston seal.
The external stop screw provides a 75 mm adjust window, allowing you to trim the extend stroke from the 125 mm maximum down to 50 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X125-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X125-75 replacement — usually within 7-8 hours.