This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X225-100S, 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 SIJ125X225-100S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 225mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X225-100S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X225-100S
- 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 SIJ125X225-100S
The AirTAC SIJ125X225-100S is a double-acting, double-rod ISO 15552 adjustable-stroke cylinder featuring a 125 mm bore and a 225 mm maximum extend stroke. An external stop screw allows you to trim the extend stroke on-site by up to 100 mm, yielding a usable stroke range of 125-225 mm. The body uses a G1/2 port, an M27x2 rod thread, and 40 mm adjustable air cushions at each end.
This SIJ model is discontinued; the direct replacement is the SAIJ125X225-100S, which preserves the ISO 15552 mounting interface, bore, force, and adjust window. The SAIJ upgrade introduces a two-piece Y-shaped one-way piston seal for lower start-up pressure and longer life. Note that the stop screw sets the end position but is not a load lock; for held loads use an external rod lock or the SAIL/BSAI variants.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X225-100S |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125X225-100S 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 SAIJ125X225-100S 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 SIJ125X225-100S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SIJ125X225-100S Is Used
Press Fit Tuning
Allows operators to dial in the exact 125-225 mm extend position for pressing bearings without machining custom spacers.
Variable Format Flaps
Adjusts the extend end-stop on the fly to accommodate different carton depths in packaging lines.
Adjustable Diverter
Sets precise product routing distances on a conveyor where lane widths change frequently.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100S with the SAIJ125X225-100S
To replace the discontinued SIJ125X225-100S, order the direct replacement SAIJ125X225-100S, ensuring you keep the -S suffix for the piston magnet (compatible with legacy CS1-B/DS1-B switches). The 100 mm adjust window is ideal if your end-position needs field tuning between 125 mm and 225 mm. Reuse existing FA, LB, or TC ISO 15552 mounts. For this 225 mm stroke, side-load is moderate, but for any stroke over 300 mm, guide the load externally to prevent rod bending. Remember the stop screw is not a brake; without live air the piston drifts.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X225-100S
- ✓ 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 SIJ125X225-100S FAQ
Yes, the SIJ125X225-100S is discontinued. The direct replacement is the SAIJ125X225-100S. It shares the same ISO 15552 interface, 125 mm bore, 225 mm stroke, 100 mm adjust window, G1/2 port, and mounting options, but features an upgraded two-piece Y-shaped piston seal.
The external stop screw provides a 100 mm adjust window, allowing the extend stroke to be shortened on-site from 225 mm down to 125 mm. The stop sets position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X225-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X225-100S replacement — usually within 7-8 hours.