This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X70-30, 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 SIJ125X70-30
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X70-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X70-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X70-30
- 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 SIJ125X70-30
The AirTAC SIJ125X70-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 70 mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 40-70 mm window. The direct replacement is the SAIJ125X70-30, matching the interface, force, and mounting.
Because this SKU lacks the -S suffix, it has no magnet and cannot accept a magnetic switch. The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. 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 SIJ125X70-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X70-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X70-30 |
| Bore size | Ø125 mm |
| Stroke | 70 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 SAIJ125X70-30 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 SAIJ125X70-30 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 SIJ125X70-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×70 | 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 SIJ125X70-30 Is Used
Press Fit Tuning
Allows operators to dial in the exact 40-70 mm extend position on-site for inserting bearings without re-machining the fixture.
Variable Length Diverter
Adjusts the extend stroke up to 30 mm to deflect different package sizes on a packaging line, ensuring precise routing.
Adjustable End Stop
Sets a hard mechanical end position for pallets or workpieces, providing a tunable 40-70 mm reach without swapping cylinders.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X70-30 with the SAIJ125X70-30
To replace the discontinued SIJ125X70-30, order the direct replacement SAIJ125X70-30, keeping the same 125 mm bore, 70 mm nominal stroke, 30 mm adjust window, and G1/2 port. Choose the 30 mm adjust window when you need field tuning between 40 and 70 mm; this avoids machining a custom fixed-stroke SAI cylinder. Mounting options include Basic, FA, LB, and TC brackets. Since this non-magnetic SKU cannot take a sensor, add the -S suffix if switch detection is required. For this 70 mm stroke side-load is minimal, but for any stroke >=300 mm ensure guide rails carry the lateral load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X70-30
- ✓ 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 SIJ125X70-30 FAQ
Yes, the SIJ125X70-30 is discontinued. The direct replacement is the SAIJ125X70-30, which shares the same ISO 15552 interface, 125 mm bore, 70 mm stroke, 30 mm adjust window, and G1/2 port.
The external stop screw provides a 30 mm adjust window, allowing you to trim the 70 mm nominal extend stroke down to 40 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X70-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X70-30 replacement — usually within 7-8 hours.