This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X30-30, 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 SIJ125X30-30
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 30mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X30-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X30-30
- 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 SIJ125X30-30
The AirTAC SIJ125X30-30 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder that is now discontinued. The direct replacement is the SAIJ125X30-30, retaining the exact 125mm bore, 30mm nominal stroke, G1/2 port, and mounting interface. An external stop screw lets you trim the extend stroke by up to 30mm on-site, setting the end position precisely without extra machining. This stop sets end position; it is not a load lock.
The SAIJ upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnet SKU cannot take a switch, and plain cylinders drift on air loss, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X30-30 |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAIJ125X30-30 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 SAIJ125X30-30 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 SIJ125X30-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SIJ125X30-30 Is Used
Press Fit Operations
Needs field stroke tuning to dial in the exact 0-30mm extend position for seating bearings without bottoming out the tooling.
Variable Depth Sealing
Requires adjusting the extend end-point on-site to accommodate different box heights or lid placements during format changes.
End-of-Stroke Dampening
Demands precise stop positioning to tune the contact point against a workpiece, ensuring the 40mm cushion absorbs kinetic energy correctly.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X30-30 with the SAIJ125X30-30
To replace the discontinued SIJ125X30-30, order the direct replacement SAIJ125X30-30, which matches the ISO 15552 mounting dimensions, M27x2 rod thread, and G1/2 port. This 30mm adjust window allows trimming the extend stroke down to zero on-site, which beats using a fixed SAI cylinder with an external stop because it saves space and avoids custom machining. Mounting options include FA, LB, and TC brackets. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add -S if sensing is needed. For strokes over 300mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X30-30
- ✓ 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 SIJ125X30-30 FAQ
Yes, the SIJ125X30-30 is discontinued. The direct replacement is the SAIJ125X30-30. It shares the identical ISO 15552 interface, 125mm bore, 30mm stroke, 30mm adjust window, G1/2 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
The external stop screw allows you to trim the extend stroke by up to 30mm on-site (usable extend stroke 0-30mm). The stop sets end position and is not a load lock; speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X30-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X30-30 replacement — usually within 7-8 hours.