This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X120-75, 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 SIJ125X120-75
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X120-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 120mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X120-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X120-75
- 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 SIJ125X120-75
The AirTAC SIJ125X120-75 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, giving a usable 45-120 mm range from the 120 mm nominal maximum. The direct replacement is the SAIJ125X120-75, matching the interface, force, and mounting.
Upgrading to the SAIJ family retains the ISO 15552 mounting footprint while adding 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. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X120-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X120-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X120-75 |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAIJ125X120-75 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 SAIJ125X120-75 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 SIJ125X120-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SIJ125X120-75 Is Used
Press Fit Tuning
Allows operators to dial in the exact 45-120 mm extend position on-site for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjusts the extend stop to deflect varying package sizes on a sorting line, trimming the stroke up to 75 mm as needed.
Adjustable End Stop
Sets a precise physical end position for pallet positioning that can be re-tuned quickly when product dimensions change.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X120-75 with the SAIJ125X120-75
To replace the discontinued SIJ125X120-75, order the exact direct replacement SAIJ125X120-75. Choose the 75 mm adjust window when you need to trim the extend stroke on-site between 45 and 120 mm. Mounting attachments (Basic, FA, LB, TC) reuse your existing ISO 15552 interface points. Because this SKU has no -S suffix, it cannot accept a magnetic switch; add -S if sensing is required. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X120-75
- ✓ 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 SIJ125X120-75 FAQ
Yes, the SIJ125X120-75 is discontinued. The direct replacement is the SAIJ125X120-75, offering the same ISO 15552 interface, 125 mm bore, 120 mm stroke, 75 mm adjust window, and G1/2 port. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 75 mm on-site, yielding a usable 45-120 mm range. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X120-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X120-75 replacement — usually within 7-8 hours.