This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X700-20S, 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 SIJ125X700-20S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20S 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 SAIJ125X700-20S, 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 → SAIJ125X700-20S
- 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 SIJ125X700-20S
The AirTAC SIJ125X700-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 680-700 mm stroke (700 mm is the maximum). The direct replacement is the SAIJ125X700-20S, matching the interface, force, and mounting.
The SAIJ upgrade features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. Note the stop sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X700-20S |
| 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 SAIJ125X700-20S 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 SAIJ125X700-20S 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 SIJ125X700-20S
| 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 SIJ125X700-20S Is Used
Press Fit Tuning
Field-trim the extend stroke by up to 20 mm to set precise press depths without machining spacers.
Transfer Stopper Adjustment
Dial in the exact stop position for varying product lengths on a 700 mm transfer line.
Pallet Positioning
Fine-tune the extend end point to accommodate slight pallet width variations.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X700-20S with the SAIJ125X700-20S
To replace the discontinued SIJ125X700-20S, order the exact direct replacement SAIJ125X700-20S, keeping the 20 mm adjust window and -S magnet. Size both ways using 0.5 MPa force: the 100 mm neighbor pushes 3927 N, while the 160 mm pushes 10053 N. Reuse ISO 15552 mounting (FA, LB, TC) and note the 40 mm adjustable cushions. For the 700 mm stroke, add external guides to prevent rod bending and side-load wear. The stop screw trims extend position only; it does not lock, so use an external rod lock for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X700-20S
- ✓ 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 SIJ125X700-20S FAQ
Yes, it is discontinued. The direct replacement is the SAIJ125X700-20S, offering the same ISO 15552 interface, 125 mm bore, 700 mm stroke, 20 mm adjust window, and G1/2 port.
The 125 mm bore with a G1/2 port pushes 6136 N and pulls 5734 N at 0.5 MPa, pushing 8590 N at 0.7 MPa and 11045 N at 0.9 MPa. The external stop screw window is 20 mm, allowing a usable extend stroke of 680-700 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X700-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X700-20S replacement — usually within 7-8 hours.