This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX450, 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 SI100 Standard Cylinder SI100BX450
The AirTAC Airtac SI100 Standard Cylinder SI100BX450 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 SAI100BX450, 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 → SAI100BX450
- 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 SI100 Standard Cylinder SI100BX450
The AirTAC SI100BX450 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100BX450. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke and output force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU uses a SUS304 stainless rod (B option) but lacks a magnet, so it cannot take CS1-B/DS1-B sensors.
The SAI family also introduces SAIL, SAIF and BSAI lock/valve variants absent in the SI line. Remember, a plain cylinder drifts on air loss; the cushion only decelerates, so use an external rod lock for holding.
Airtac SI100 Standard Cylinder SI100BX450 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX450 |
| 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 SAI100BX450 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 SAI100BX450 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100BX450
| 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 SI100 Standard Cylinder SI100BX450 Is Used
Heavy Press Clamping
Secures large steel plates in machining fixtures using 3927N of clamping force at 0.5MPa.
Vertical Lift Gates
Raises industrial safety gates over a 450mm travel distance, requiring external guides to prevent rod bending.
Replacing the Airtac SI100 Standard Cylinder SI100BX450 with the SAI100BX450
To replace the discontinued SI100BX450, order the SAI100BX450 direct equivalent, verifying the ISO 15552 mounting interface, 450mm stroke, G1/2 port (PT/G/NPT thread options) and specific mounting accessory. This no-magnet SKU cannot accept position sensors; order an -S variant if CS1-B/DS1-B switches are needed. If sizing up or down, note the 80mm bore offers 2513N push while the 125mm bore provides 6136N at 0.5MPa. For load holding on air loss, the standard cushion only decelerates; specify a SAIL or BSAI lock variant, or an external pilot check valve. Because the 450mm stroke invites rod bending, use external guides to prevent side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX450
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100BX450 FAQ
Yes, the AirTAC SI100BX450 is discontinued. The direct replacement is the SAI100BX450. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 450mm stroke, 3927N force, G1/2 port and mounting interface.
The G1/2 port bore delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. The piston rod is 25mm with an M20x1.5 thread, and speed ranges 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX450 replacement — usually within 7-8 hours.