This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X275-10S, 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 SIJ125X275-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10S 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 SAIJ125X275-10S, 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 → SAIJ125X275-10S
- 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 SIJ125X275-10S
The AirTAC SIJ125X275-10S 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 10 mm on-site, yielding a usable 265-275 mm stroke (275 mm nominal max). The 125 mm bore uses a G1/2 port, M27x2 rod thread, and 40 mm adjustable cushions.
The direct replacement is the SAIJ125X275-10S, matching the ISO 15552 interface, bore, and force. The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. 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 SIJ125X275-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X275-10S |
| 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 SAIJ125X275-10S 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 SAIJ125X275-10S 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 SIJ125X275-10S
| 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 SIJ125X275-10S Is Used
Press Fit Calibration
Dialing in a 265-275 mm press stroke on-site to perfectly seat bearings without over-traveling or bottoming out the tooling.
Divertor Gate Positioning
Adjusting the extend endpoint by up to 10 mm to fine-tune product flow angles on a packaging line for varying carton widths.
Pallet Stop Alignment
Setting a precise mechanical stop position for pallets, allowing 10 mm of field flexibility to accommodate pallet size variances.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10S with the SAIJ125X275-10S
To replace the discontinued SIJ125X275-10S, order the direct replacement SAIJ125X275-10S, reusing your existing FA, LB, or TC ISO 15552 mounts. The 10 mm adjust window is ideal for fine-tuning the 265-275 mm extend endpoint without shims. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. For stroke >=300 mm, verify side-load tolerance to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X275-10S
- ✓ 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 SIJ125X275-10S FAQ
Yes, the SIJ125X275-10S is discontinued. The direct replacement is the SAIJ125X275-10S. It shares the same ISO 15552 interface, 125 mm bore, 275 mm stroke, 10 mm adjust window, G1/2 port, and mounting options. The SAIJ also uses an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 10 mm adjust window, shortening the extend stroke from 275 mm down to 265 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X275-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X275-10S replacement — usually within 7-8 hours.