This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X500-30, 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 SIJ125X500-30
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X500-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X500-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X500-30
- 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 SIJ125X500-30
The AirTAC SIJ125X500-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 500 mm nominal stroke and 125 mm bore. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 470-500 mm window. The direct replacement is the SAIJ125X500-30, matching the interface, force, and mounting.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads. This non-magnetic SKU cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X500-30 |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125X500-30 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 SAIJ125X500-30 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 SIJ125X500-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SIJ125X500-30 Is Used
Press Fit Tuning
Adjusting the extend end position by up to 30 mm on-site to set precise pressing depths for large bearings without machining custom spacers.
Divertor Stroke Setup
Fine-tuning the actuator reach over a 470-500 mm window during commissioning to align a heavy diverter arm perfectly with varying product widths.
Pallet Stop Calibration
Trimming the extend stroke on a packaging line to act as a hard mechanical stop for pallets, allowing field adjustment as pallet dimensions vary.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-30 with the SAIJ125X500-30
To replace the discontinued SIJ125X500-30, order the direct replacement SAIJ125X500-30 (insert A after the leading S), keeping the 125 mm bore, 500 mm stroke, 30 mm adjust window, and G1/2 port. Choose the 30 mm adjust window if you need to fine-tune the extend end position on-site between 470 and 500 mm. Mounting reuses ISO 15552 interfaces like FA, LB, or TC. As this SKU lacks the -S magnet, it cannot accept a magnetic switch. Because the 500 mm stroke is long, account for side-load and rod-bending forces by incorporating external guides to prevent premature wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X500-30
- ✓ 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 SIJ125X500-30 FAQ
Yes, the SIJ125X500-30 is discontinued. The direct replacement is the SAIJ125X500-30. It shares the same ISO 15552 interface, 125 mm bore, 500 mm stroke, 30 mm adjust window, G1/2 port, and mounting options, while upgrading the piston seal to two Y-shaped one-way elements for longer life.
The external stop screw allows you to trim the extend stroke by up to 30 mm on-site, giving a usable window of 470-500 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X500-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X500-30 replacement — usually within 7-8 hours.