This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X275-75S, 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 SIJ125X275-75S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X275-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 275mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X275-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X275-75S
- 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 SIJ125X275-75S
The AirTAC SIJ125X275-75S 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 200-275 mm range (275 mm is the maximum). The direct replacement is the SAIJ125X275-75S, reusing your existing mounting interface.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. This -S model includes a piston magnet for legacy CS1-B/DS1-B switches. Remember the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-75S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X275-75S |
| Bore size | Ø125 mm |
| Stroke | 275 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 SAIJ125X275-75S 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 SAIJ125X275-75S 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 SIJ125X275-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 SIJ125X275-75S Is Used
Press Fit Tuning
Allows precise on-site extend stroke reduction up to 75 mm to set exact pressing depths without machining fixed stop spacers.
Variable Transfer Stops
Adjusts the extend stop position dynamically for different package sizes on a single 125 mm bore ISO 15552 line.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-75S with the SAIJ125X275-75S
To replace the discontinued SIJ125X275-75S, order the SAIJ125X275-75S; it matches the 125 mm bore, 275 mm max stroke, 75 mm adjust window, G1/2 port, and FA/LB/TC mountings. Choose the 75 mm adjust window if your end-position tuning exceeds the 50 mm option. The -S suffix confirms a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For strokes of 300 mm or longer, verify side-load limits to prevent rod distortion.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X275-75S
- ✓ 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 SIJ125X275-75S FAQ
Yes, the SIJ125X275-75S is discontinued. The direct replacement is the SAIJ125X275-75S, matching the ISO 15552 interface, 125 mm bore, 275 mm stroke, 75 mm adjust window, and G1/2 port.
The external stop screw window is 75 mm, allowing you to trim the extend stroke from 275 mm down to 200 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X275-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X275-75S replacement — usually within 7-8 hours.