This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X700-20, 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 SIJ125X700-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 700mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X700-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X700-20
- 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 SIJ125X700-20
The AirTAC SIJ125X700-20 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, discontinued and replaced by the direct replacement SAIJ125X700-20. It uses an external stop screw to trim the extend stroke by up to 20 mm on-site, yielding a usable 680-700 mm stroke. The SAIJ upgrade retains the exact interface but adds a two-piece Y-shaped piston seal for lower start-up pressure.
This SKU lacks a magnet (-S) and cannot accept a sensor. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads. At 700 mm, external guides are critical to prevent rod bending.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X700-20 |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125X700-20 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 SAIJ125X700-20 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 SIJ125X700-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SIJ125X700-20 Is Used
Press Tonnage Calibration
Trimming the extend stroke by up to 20 mm on-site allows precise calibration of pressing positions without machining hard stops.
Transfer Line Diverter
Adjusting the extend end position accommodates varying package sizes on the fly, ensuring accurate diverting at the 700 mm reach.
Pallet Stopper Alignment
Fine-tuning the stroke window enables exact pallet end-stop positioning, adapting to different pallet geometries dynamically.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20 with the SAIJ125X700-20
To replace the discontinued SIJ125X700-20, order the direct replacement SAIJ125X700-20, matching the 125 mm bore, 700 mm max stroke, 20 mm adjust window, G1/2 port, and ISO 15552 mounting. Choose the 20 mm adjust window when you need on-site extend trimming between 680-700 mm. Reuse FA, LB, or TC mounts. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For the 700 mm stroke, add external guides to manage side-load and rod-bending risks.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X700-20
- ✓ 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 SIJ125X700-20 FAQ
Yes, the SIJ125X700-20 is discontinued. The direct replacement is the SAIJ125X700-20, which shares the same ISO 15552 interface, 125 mm bore, 700 mm stroke, 20 mm adjust window, and G1/2 port.
The external stop screw window is 20 mm, allowing the extend stroke to be shortened from 700 mm to 680 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X700-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X700-20 replacement — usually within 7-8 hours.