This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X700-50S, 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 SIJ125X700-50S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X700-50S 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 SAIJ125X700-50S, 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 → SAIJ125X700-50S
- 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 SIJ125X700-50S
The AirTAC SIJ125X700-50S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable 650-700 mm window from the 700 mm nominal maximum. The direct replacement is the SAIJ125X700-50S, retaining the same interface, force, and adjust window.
The SAIJ upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors. Note that the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-50S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X700-50S |
| 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 SAIJ125X700-50S 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 SAIJ125X700-50S 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 SIJ125X700-50S
| 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 SIJ125X700-50S Is Used
Press Tonnage Calibration
Requires field stroke tuning to set precise 650-700 mm extend endpoints during press tooling calibration, ensuring accurate contact without re-engineering the fixture.
Variable Length Diverter
Needs on-site stroke trimming to adjust package diverting arms for changing box formats, using the 50 mm stop screw to adapt the extend position quickly.
Adjustable Pallet Stopper
Demands a configurable end position to handle varying pallet depths, allowing operators to shorten the extend stroke by up to 50 mm to accommodate different load sizes.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-50S with the SAIJ125X700-50S
To replace the discontinued SIJ125X700-50S, order the direct replacement SAIJ125X700-50S directly—it matches the ISO 15552 mounting, 700 mm stroke, 50 mm adjust window, G1/2 port, and -S magnet. Choose the 50 mm adjust window if your extend stroke needs field tuning between 650 and 700 mm. Mounting options include FA, LB, and TC brackets. Because the 700 mm stroke is long, account for rod bending and use external guides to minimize side loads. The -S magnet supports legacy CS1-B/DS1-B switches (current AirTAC switches used on SAIJ).
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X700-50S
- ✓ 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 SIJ125X700-50S FAQ
Yes, the SIJ125X700-50S is discontinued. The direct replacement is the SAIJ125X700-50S. It shares the same ISO 15552 interface, 125 mm bore, 700 mm stroke, 50 mm adjust window, G1/2 port, and mounting options, but adds an upgraded two-piece Y-shaped piston seal.
The external stop screw window is 50 mm, allowing you to trim the extend stroke from 700 mm down to 650 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X700-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X700-50S replacement — usually within 7-8 hours.