This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X175-30SN, 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 SIJ125X175-30SN
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 175mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X175-30SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X175-30SN
- 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 SIJ125X175-30SN
The AirTAC SIJ125X175-30SN is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It uses an external stop screw to trim the extend stroke by up to 30 mm on-site, yielding a usable 145-175 mm extend window from the 175 mm nominal maximum. It features a G1/2 port, M27x2 rod thread, 40 mm adjustable cushions, and a 30-500 mm/s speed range. The direct replacement is the SAIJ125X175-30SN, retaining the same interface, force, and adjustability.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This SIJ unit includes a -S piston magnet for legacy CS1-B/DS1-B switches and an -N NBR seal rated for -20 to +70 C. The stop screw sets end position but is not a load lock; use SAIL/BSAI or an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30SN Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X175-30SN |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125X175-30SN 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 SAIJ125X175-30SN 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 SIJ125X175-30SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SIJ125X175-30SN Is Used
Press Fit Tuning
Field-trim the 145-175 mm extend stroke by up to 30 mm to set exact insertion depth for bearing press fits without machining new stops.
Divertor Positioning
Adjust the extend endpoint on-site to synchronize a divertor arm with varying product widths on a packaging line.
Pallet Stop Calibration
Fine-tune the 125 mm bore extend stop to adapt pallet halting positions dynamically during layout changes.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30SN with the SAIJ125X175-30SN
To replace this discontinued SIJ125X175-30SN, order the direct replacement SAIJ125X175-30SN, keeping the 175 mm stroke, 30 mm adjust window, G1/2 port, and -S magnet. Size both ways using 0.5 MPa push force: the 100 mm bore yields 3927 N (smaller), while the 160 mm bore yields 10053 N (larger). Choose the adjust window to cover your on-site trim range (here, shortening extend by up to 30 mm). Mounting reuses ISO 15552 interfaces (Basic, FA, LB, TC). The -N NBR seal suits standard -20 to +70 C environments. For strokes >=300 mm, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X175-30SN
- ✓ 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 SIJ125X175-30SN FAQ
Yes, the SIJ125X175-30SN is discontinued. The direct replacement is the SAIJ125X175-30SN, matching the ISO 15552 interface, 125 mm bore, 175 mm stroke, 30 mm adjust window, G1/2 port, and mounting.
The external stop screw window is 30 mm, allowing the extend stroke to be shortened from the 175 mm maximum down to 145 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X175-30SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X175-30SN replacement — usually within 7-8 hours.