This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X75-30, 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 SIJ125X75-30
The AirTAC Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X75-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X75-30
- 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 SIJ125X75-30
The AirTAC SIJ125X75-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. A G1/2 port and 32mm rod frame a 75mm nominal extend stroke that an external stop screw can trim by up to 30mm on-site, yielding a usable 45-75mm window. The stop sets the end position; it is not a load lock.
The direct replacement is the SAIJ125X75-30, preserving the ISO 15552 mounting interface, bore, force, and adjust window. The SAIJ family brings an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a -S magnet and cannot accept a sensor.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X75-30 |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125X75-30 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 SAIJ125X75-30 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 SIJ125X75-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SIJ125X75-30 Is Used
Press Fit Tuning
Dialing in a 45-75mm insertion depth for bearing press fits, using the external stop screw to set the exact end position without re-engineering the fixture.
Variable Carton Flap Folding
Adjusting the extend stroke on-site to accommodate fluctuating carton heights, using the 30mm trim window to precisely set the folding arm endpoint.
Clamping Force Positioning
Setting a rigid 6136N clamping endpoint at 0.5MPa for cast parts, relying on the external stop to repeat the position securely.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-30 with the SAIJ125X75-30
To replace the discontinued SIJ125X75-30, order the SAIJ125X75-30; it is a direct for the ISO 15552 interface, FA/LB/TC mountings, and G1/2 port. Choose the 30mm adjust window when you need precise 45-75mm extend tuning on-site. Because this is a non-magnetic SKU, you cannot mount legacy CS1-B/DS1-B sensors. For stroke lengths under 300mm, side-load risk is minimal. A plain cylinder does not hold loads on air loss; for held loads use an external rod lock or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X75-30
- ✓ 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 SIJ125X75-30 FAQ
Yes, the SIJ125X75-30 is discontinued. The direct replacement is the SAIJ125X75-30. It matches the ISO 15552 interface, 125mm bore, 75mm stroke, 30mm adjust window, G1/2 port, and mounting options. The SAIJ upgrades to a two-piece Y-shaped piston seal for lower start-up pressure and longer life.
The external stop screw provides a 30mm adjust window, shortening the 75mm nominal extend stroke to a usable 45-75mm range on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X75-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X75-30 replacement — usually within 7-8 hours.