This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X350-100, 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 SIJ125X350-100
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X350-100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X350-100
- 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 SIJ125X350-100
The AirTAC SIJ125X350-100 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 100 mm on-site, yielding a usable 250-350 mm extension from the 350 mm nominal maximum.
This EOL model drops in directly to the SAIJ125X350-100, retaining the exact interface, force, and mounting. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets end position only; it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X350-100 |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125X350-100 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 SAIJ125X350-100 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 SIJ125X350-100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SIJ125X350-100 Is Used
Press Fit Tuning
Allows on-site extend stroke reduction up to 100 mm to dial in exact press contact depth without machining hard stops.
Variable Length Diverter
Adjusts the extend position dynamically on-site to divert varying package sizes on a heavy-duty conveyor line.
Adjustable Pallet Stop
Sets precise end positions for different pallet footprints, trimming the 350 mm stroke by up to 100 mm as needed.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X350-100 with the SAIJ125X350-100
To replace this discontinued cylinder, use the SAIJ125X350-100 direct, keeping the 350 mm nominal stroke and 100 mm adjust window. Reuse your FA, LB, or TC ISO 15552 mounts. This SKU lacks the -S magnet and cannot take a switch. For the 350 mm stroke, support side-load with external guides to prevent rod bending. The stop screw sets end position but does not hold loads on air loss—use SAIL/BSAI or an external rod lock for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X350-100
- ✓ 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 SIJ125X350-100 FAQ
Yes, the SIJ125X350-100 is discontinued. The direct replacement is the SAIJ125X350-100, matching the ISO 15552 interface, 125 mm bore, 350 mm stroke, 100 mm adjust window, and G1/2 port. The SAIJ family also adds an upgraded two Y-shaped one-way piston seal.
The theoretical max is 1251 kgf at 1.0 MPa. The external stop screw window is 100 mm, allowing you to trim the extend stroke from 350 mm down to 250 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X350-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X350-100 replacement — usually within 7-8 hours.