This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X600-20, 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 SIJ125X600-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X600-20 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 SAIJ125X600-20, 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 → SAIJ125X600-20
- 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 SIJ125X600-20
The AirTAC SIJ125X600-20 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 20 mm on-site, yielding a usable 580-600 mm forward travel. The direct replacement is the SAIJ125X600-20, matching the interface, force, and mounting.
The SAIJ successor retains the exact specifications but incorporates an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot accept a sensor. The stop screw sets the end position but is not a load lock; use an external rod lock or check valve for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X600-20 |
| 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 SAIJ125X600-20 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 SAIJ125X600-20 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 SIJ125X600-20
| 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 SIJ125X600-20 Is Used
Bulk Material Diverting
Adjust the extend stop by up to 20 mm on-site to perfectly align a heavy-duty diverter gate without repositioning the ISO 15552 mounting hardware.
Pallet Positioning Stops
Regulate the end-stop position for varying pallet depths, relying on the 40 mm adjustable cushion to decelerate the 125 mm bore safely at stroke end.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-20 with the SAIJ125X600-20
To replace the discontinued SIJ125X600-20, order the direct replacement SAIJ125X600-20, which preserves the 600 mm stroke, 20 mm adjust window, and G1/2 port. Choose the 20 mm adjust window if you need precise 580-600 mm extend tuning. Mounting attachments (FA, LB, TC) are reusable ISO 15552 interfaces. Because the 600 mm stroke exceeds 300 mm, verify side-load conditions and use external guides to prevent rod bending. This non-magnetic version cannot fit legacy CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X600-20
- ✓ 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 SIJ125X600-20 FAQ
Yes, the SIJ125X600-20 is discontinued. The direct replacement is the SAIJ125X600-20. It shares the identical ISO 15552 interface, 125 mm bore, 600 mm stroke, 20 mm adjust window, G1/2 port, and mounting options, but adds an upgraded SAI piston seal.
The external stop screw window is 20 mm, allowing you to trim the extend stroke from 600 mm down to 580 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X600-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X600-20 replacement — usually within 7-8 hours.