This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X225-100, 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 SIJ125X225-100
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100 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 SAIJ125X225-100, 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 → SAIJ125X225-100
- 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 SIJ125X225-100
The AirTAC SIJ125X225-100 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It lets you trim the extend stroke by up to 100 mm on-site, giving a usable 125-225 mm range from the 225 mm nominal maximum. The external stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads. This 125 mm bore uses a G1/2 port, a Ø32 mm rod, and 40 mm adjustable cushions.
The direct replacement is the SAIJ125X225-100, matching the interface, force, and mounting. The SAIJ upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. This SKU lacks a -S magnet and cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X225-100 |
| 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 SAIJ125X225-100 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 SAIJ125X225-100 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 SIJ125X225-100
| 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 SIJ125X225-100 Is Used
Press Fit Tuning
Allows operators to fine-tune the extend position on-site for inserting bearings or pins, avoiding hard mechanical stops when mating parts have slight dimensional variances.
Variable Format Sealing
Provides a 125-225 mm extend range to accommodate different carton depths on a packaging line, letting operators dial in the exact stroke needed for each format changeover.
Adjustable Ejector Stroke
Sets the precise ejection distance for parts leaving a mold or fixture, ensuring delicate components are pushed clear without overshooting the conveyor.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X225-100 with the SAIJ125X225-100
To replace the SIJ125X225-100, order the direct replacement SAIJ125X225-100, reusing your existing ISO 15552 FA, LB, or TC mounts. The 100 mm adjust window is ideal for field-tuning the 225 mm stroke without machining. Because this SKU lacks a -S magnet, it cannot accept legacy CS1-B/DS1-B sensors; add external sensing if required. For stroke lengths over 300 mm, carefully manage side loading to prevent premature seal wear. The SAI family also adds the SAIL air-released lock and BSAI clamp-lock variants the SI line lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X225-100
- ✓ 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 SIJ125X225-100 FAQ
Yes, the SIJ125X225-100 is discontinued. The direct replacement is the SAIJ125X225-100. It shares the same ISO 15552 interface, 225 mm stroke, 100 mm adjust window, G1/2 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal for lower start-up pressure.
The external stop screw allows you to trim the extend stroke by up to 100 mm on-site, yielding a usable 125-225 mm range. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X225-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X225-100 replacement — usually within 7-8 hours.