This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X450-75S, 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 SIJ100X450-75S
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X450-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X450-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X450-75S
- 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 SIJ100X450-75S
The AirTAC SIJ100X450-75S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 100mm bore and 450mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 75mm on-site, yielding a usable 375-450mm window. The bore dictates a G1/2 port, M20x1.5 rod thread, and 36mm adjustable air cushions. This SIJ is discontinued; the direct replacement is the SAIJ100X450-75S, matching the interface, force, and mounting.
The SAIJ successor retains these ratings but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note the stop screw sets end position only; it is not a load lock.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X450-75S Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X450-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X450-75S |
| Bore size | Ø100 mm |
| Stroke | 450 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 SAIJ100X450-75S 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 SAIJ100X450-75S 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 SIJ100X450-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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 SIJ100X450-75S Is Used
Press Fit Tuning
Allows operators to dial in the exact 375-450mm extend position on-site for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjusts the extend stop to deflect varying package sizes on a conveyor line, providing flexible routing without changing cylinders.
Adjustable End Stop Pusher
Sets precise material push-off distances at different workstations, using the 75mm trim window to accommodate multiple product formats.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X450-75S with the SAIJ100X450-75S
To replace the discontinued SIJ100X450-75S, order the exact direct replacement SAIJ100X450-75S, which preserves the 450mm stroke, 75mm adjust window, G1/2 port, and ISO 15552 mounting dimensions. Choose the 75mm adjust window if your extend stroke needs on-site tuning between 375mm and 450mm; this avoids needing a custom fixed-stroke unit. Mounting options include Basic, FA, LB, and TC brackets. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Because the stroke is 450mm, ensure external guides support side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X450-75S
- ✓ 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 SIJ100X450-75S FAQ
Yes, the SIJ100X450-75S is discontinued. The direct replacement is the SAIJ100X450-75S. It shares the identical ISO 15552 interface, 100mm bore, 450mm stroke, 75mm adjust window, G1/2 port, and mounting options, but features an upgraded SAI piston seal.
The external stop screw provides a 75mm adjust window, allowing the extend stroke to be shortened from the 450mm maximum down to 375mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X450-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X450-75S replacement — usually within 7-8 hours.