This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X450-20S, 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 SIJ100X450-20S
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X450-20S 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 SAIJ100X450-20S, 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 → SAIJ100X450-20S
- 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 SIJ100X450-20S
The AirTAC SIJ100X450-20S 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 20 mm on-site, giving a usable 430-450 mm window from the 450 mm nominal maximum. The direct replacement is the SAIJ100X450-20S, sharing the same interface, force, and mounting.
The stop screw strictly sets the end position and is not a load lock; the cylinder will drift on air loss. Upgrading to the SAIJ family brings an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. The SAI line also adds lock variants like SAIL and BSAI that the SIJ lacked, though ratings remain unchanged.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X450-20S Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X450-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X450-20S |
| 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 SAIJ100X450-20S 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 SAIJ100X450-20S 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 SIJ100X450-20S
| 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 SIJ100X450-20S Is Used
Press Fit Tuning
Allows operators to fine-tune the 430-450 mm extend endpoint on-site for inserting bearings without re-machining stop blocks.
Divertor Positioning
Provides adjustable end-position limits for a diverting arm where product sizes vary and exact 20 mm stroke trimming is needed.
Pallet Stop Adjustment
Enables field adjustment of the extend stroke to accommodate varying pallet depths without swapping the entire cylinder.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X450-20S with the SAIJ100X450-20S
To replace the discontinued SIJ100X450-20S, order the exact direct replacement SAIJ100X450-20S, which preserves the 450 mm maximum stroke, 20 mm adjust window, G1/2 port, and ISO 15552 mounting. Choose the 20 mm adjust window if your extend endpoint needs field tuning between 430 and 450 mm. Mounting options include Basic, FA, LB, and TC. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Because the 450 mm stroke is long, ensure external guides are used to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X450-20S
- ✓ 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 SIJ100X450-20S FAQ
Yes, the SIJ100X450-20S is discontinued. The direct replacement is the SAIJ100X450-20S, which maintains the same ISO 15552 interface, 100 mm bore, 450 mm stroke, 20 mm adjust window, and G1/2 port.
The external stop screw allows trimming the extend stroke by up to 20 mm on-site, yielding a 430-450 mm usable window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X450-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X450-20S replacement — usually within 7-8 hours.