This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X400-50, 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X400-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X400-50
- 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50
The AirTAC SIJ100X400-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 100 mm bore and 400 mm maximum extend stroke. An external stop screw lets you trim the extend stroke on-site by up to 50 mm, yielding a usable 350-400 mm window. As this SIJ is end-of-life, the direct replacement is the SAIJ100X400-50, sharing the same interface, force, and mounting.
The SAIJ upgrade uses an improved two Y-shaped one-way piston seal for low start-up pressure and long 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50 Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X400-50 |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ100X400-50 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAIJ100X400-50 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50 Is Used
Press Fit Tuning
Allows precise on-site stroke trimming up to 50 mm for pressing assemblies, ensuring exact insertion depth without machining fixed stops.
Variable Length Diverter
Adjusts the extend stroke on packaging lines to deflect varying product sizes accurately within the 350-400 mm range.
Adjustable End Stop
Sets a precise mechanical end position for pallet positioning, allowing flexible 50 mm adjustments as pallet dimensions change.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50 with the SAIJ100X400-50
To replace the discontinued SIJ100X400-50, order the direct replacement SAIJ100X400-50, keeping the identical 400 mm stroke, 50 mm adjust window, and G1/2 port. Choose the 50 mm adjust window if your field stroke tuning requires trimming the extend by up to 50 mm from the 400 mm maximum. Mounting interfaces include Basic, FA, LB, and TC. This SKU lacks the -S magnet and cannot take a magnetic switch. Because the 400 mm stroke exceeds 300 mm, account for side-load and rod-bending by using external guides to prevent premature wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X400-50
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-50 FAQ
Yes, the SIJ100X400-50 is discontinued. The direct replacement is the SAIJ100X400-50, offering the same ISO 15552 interface, 400 mm stroke, 50 mm adjust window, and G1/2 port.
The external stop screw allows trimming the extend stroke by up to 50 mm on-site (usable 350-400 mm). The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X400-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X400-50 replacement — usually within 7-8 hours.