This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X600-40S, 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 SIJ125X600-40S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X600-40S 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 SAIJ125X600-40S, 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 → SAIJ125X600-40S
- 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 SIJ125X600-40S
The AirTAC SIJ125X600-40S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the extend stroke by up to 40mm on-site, yielding a usable 560-600mm range. The direct replacement is the SAIJ125X600-40S, matching the bore, force, port, and mounting.
The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop sets end position but is not a load lock; use SAIL or BSAI for holding. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-40S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X600-40S |
| 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 SAIJ125X600-40S 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 SAIJ125X600-40S 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 SIJ125X600-40S
| 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 SIJ125X600-40S Is Used
Press Fit Tuning
Allows on-site extend stroke trimming up to 40mm to set precise pressing depth without machining spacers.
Variable Stop Positioning
Adjusts the end-of-stroke stop for parts of varying lengths on a single 600mm stroke line.
Pallet Feed Control
Shortens the extend stroke by up to 40mm to adapt to different pallet footprints without repositioning.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X600-40S with the SAIJ125X600-40S
To replace the SIJ125X600-40S, use the SAIJ125X600-40S direct, preserving the 600mm nominal stroke and 40mm adjust window. Reuse ISO 15552 FA, LB, or TC mounts. The -S magnet enables position sensing. For the 600mm stroke, support side loads with external guides to prevent rod bending. The stop screw sets end position and is not a lock; for load holding on air loss, specify SAIL, BSAI, or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X600-40S
- ✓ 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 SIJ125X600-40S FAQ
Yes, the SIJ125X600-40S is discontinued. The direct replacement is the SAIJ125X600-40S, offering the same ISO 15552 interface, 125mm bore, 600mm stroke, 40mm adjust window, G1/2 port, and force ratings.
The external stop screw provides a 40mm adjust window, allowing the 600mm extend stroke to be shortened to 560mm on-site. Speed is 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X600-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X600-40S replacement — usually within 7-8 hours.