This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X900-30, 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 SIJ125X900-30
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X900-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 900mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X900-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X900-30
- 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 SIJ125X900-30
The AirTAC SIJ125X900-30 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the SAIJ125X900-30. The external stop screw lets you trim the extend stroke by up to 30mm on-site, yielding a usable 870-900mm stroke from the 900mm nominal maximum.
The SAIJ direct keeps the ISO 15552 mounting interface, force, and adjust window, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. The stop screw sets end position only; it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X900-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X900-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X900-30 |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125X900-30 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 SAIJ125X900-30 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 SIJ125X900-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SIJ125X900-30 Is Used
Large Press Dwell Adjustment
Fine-tune the 870-900mm extend position on-site to accommodate varying workpiece heights in a heavy-duty press without re-engineering the fixture.
Pallet Stop Positioning
Trim the extend stroke by up to 30mm to dial in the exact stopping point for oversized pallets on a high-throughput conveyor line.
Heavy Load Ejection
Adjust the ejection reach dynamically for parts of varying widths, ensuring positive ejection without over-traveling the 900mm stroke.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X900-30 with the SAIJ125X900-30
To replace the discontinued SIJ125X900-30, order the direct replacement SAIJ125X900-30 (same ISO 15552 interface, 900mm stroke, 30mm adjust window, G1/2 port, M27x2 rod, and 40mm cushions). Choose the 30mm adjust window if you need precise 870-900mm extend tuning; for fixed stops, a standard SAI cylinder with an external stop is an alternative. Mounting options include FA, LB, and TC. This SKU lacks the -S magnet and cannot take a switch. Because the 900mm stroke exceeds 300mm, ensure external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X900-30
- ✓ 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 SIJ125X900-30 FAQ
Yes, the SIJ125X900-30 is discontinued. The direct replacement is the SAIJ125X900-30, which shares the same ISO 15552 interface, 125mm bore, 900mm stroke, 30mm adjust window, G1/2 port, and mounting options.
The external stop screw provides a 30mm adjust window, making the usable extend stroke 870-900mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X900-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X900-30 replacement — usually within 7-8 hours.