This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X600-50, 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 SIJ125X600-50
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X600-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 600mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X600-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X600-50
- 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 SIJ125X600-50
The AirTAC SIJ125X600-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 600 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 550-600 mm extension. The stop sets the end position but is not a load lock; the piston drifts on air loss. This SKU has no -S magnet and cannot take a switch. The fixed G1/2 port, 32 mm rod, and 40 mm cushions match the SAI family.
The direct replacement is the SAIJ125X600-50, which reuses the ISO 15552 mounting interface and adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure. For held loads use SAIL or BSAI lock variants.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-50 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X600-50 |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125X600-50 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 SAIJ125X600-50 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 SIJ125X600-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SIJ125X600-50 Is Used
Press Fit Tuning
Adjust the 50 mm extend window on-site to dial in exact press depths for varying insert sizes without re-mounting the actuator.
Variable Length Diverter
Trim the 600 mm extend stroke to alter a diverter arm's reach across a conveyor belt, accommodating different package widths.
Adjustable End Stops
Set precise end positions for pallet routing gates, allowing 550 to 600 mm of travel to handle mixed pallet dimensions.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-50 with the SAIJ125X600-50
To replace the discontinued SIJ125X600-50, order the direct replacement SAIJ125X600-50, matching the 125 mm bore, 600 mm stroke, 50 mm adjust window, and G1/2 port. The 50 mm adjust window gives a 550-600 mm extend range. Reuse FA, LB, or TC mounts via the ISO 15552 interface. This non-magnetic SKU cannot fit a switch. For the 600 mm stroke, use external guides to prevent rod bending and side-load damage. The external stop is not a lock; use an external rod lock for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X600-50
- ✓ 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 SIJ125X600-50 FAQ
Yes, the SIJ125X600-50 is discontinued. The direct replacement is the SAIJ125X600-50, offering the same ISO 15552 interface, 125 mm bore, 600 mm stroke, 50 mm adjust window, and G1/2 port. The SAIJ adds an upgraded piston seal.
The external stop screw provides a 50 mm adjust window, shortening the 600 mm extend stroke to 550 mm. The stop sets position but does not lock the load.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X600-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X600-50 replacement — usually within 7-8 hours.