This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X75-75, 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 SIJ125X75-75
The AirTAC Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-75 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 SAIJ125X75-75, 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 → SAIJ125X75-75
- 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 SIJ125X75-75
The AirTAC SIJ125X75-75 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, dropping the usable extension from the 75 mm maximum down to zero. The direct replacement is the SAIJ125X75-75, matching the interface, force, and mounts.
The SAIJ successor adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Because the stop screw only sets the end position, it is not a load lock; for held loads use SAIL or an external rod lock. This non-magnetic SKU cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X75-75 |
| 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 SAIJ125X75-75 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 SAIJ125X75-75 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 SIJ125X75-75
| 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 SIJ125X75-75 Is Used
Press Fit Tuning
Allows operators to dial in the exact extend contact point for inserting bearings without re-mounting the entire actuator.
Variable Length Diverter
Provides adjustable reach for diverting different carton widths on a packaging line by shortening the extend stroke on-site.
Adjustable Height Stops
Sets precise mechanical end positions for pallet lifting stages where the required lift distance varies between product runs.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X75-75 with the SAIJ125X75-75
To replace the discontinued SIJ125X75-75, order the direct replacement SAIJ125X75-75 (insert an A after the leading S), keeping the 125 mm bore, 75 mm stroke, and 75 mm adjust window. Choose the 75 mm adjust window if you need to tune the extend stroke down to zero on-site. Reuse existing FA, LB, or TC ISO 15552 mounts. This SKU lacks the -S magnet, so it cannot accept legacy CS1-B/DS1-B sensors. For strokes at or over 300 mm, verify side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X75-75
- ✓ 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 SIJ125X75-75 FAQ
Yes, the SIJ125X75-75 is discontinued. The direct replacement is the SAIJ125X75-75. It shares the same ISO 15552 interface, 125 mm bore, 75 mm stroke, 75 mm adjust window, G1/2 port, and mounting options, but adds an upgraded piston seal.
The external stop screw window is 75 mm, meaning you can trim the extend stroke by up to 75 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X75-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X75-75 replacement — usually within 7-8 hours.