This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX450S, 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 SI100BX450S
The AirTAC Airtac SI100 Standard Cylinder SI100BX450S 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 SAI100BX450S, 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 → SAI100BX450S
- 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 SI100BX450S
The AirTAC SI100BX450S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100 mm bore, 450 mm stroke, SUS304 stainless steel rod, and a built-in magnet. Delivering 3927 N push force at 0.5 MPa through a G1/2 port, its direct successor is the SAI100BX450S. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life, while keeping the ISO 15552 mounting interface, bore, and force identical.
The SAI family also adds variants the SI line lacked, such as the SAIL air-released lock, SAIF integrated 4M valve, and BSAI clamp-lock. This -S SKU supports legacy CS1-B/DS1-B sensors, while the SAI replacement uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100BX450S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX450S |
| 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 SAI100BX450S 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 SAI100BX450S 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 SI100BX450S
| 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 SI100BX450S Is Used
Heavy-Duty Pressing
Drives robust pressing and stamping operations requiring up to 3927 N of push force at 0.5 MPa, utilizing the SUS304 stainless rod for corrosion resistance.
Material Handling
Powers large-scale material handling gates and heavy payload transfers where the G1/2 port and ISO 15552 profile ensure high flow and rigid mounting.
Replacing the Airtac SI100 Standard Cylinder SI100BX450S with the SAI100BX450S
To replace the discontinued SI100BX450S, order the SAI100BX450S, confirming the ISO 15552 mounting interface, 100 mm bore, 450 mm stroke, G1/2 port, and mounting accessory. The -B rod is SUS304 stainless steel, and the -S magnet works with CS1-B/DS1-B switches. When sizing both ways, a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, whereas a 125 mm bore provides 6136 N. Because this is a 450 mm stroke, use external guides to prevent rod-bending and side-load damage. A plain cylinder does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX450S
- ✓ 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 SI100BX450S FAQ
Yes, the AirTAC SI100BX450S is discontinued. The direct replacement is the SAI100BX450S. It features the same ISO 15552 mounting interface, 100 mm bore, 450 mm stroke, G1/2 port, and force output, but includes an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
This double-acting cylinder has a G1/2 port and delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX450S replacement — usually within 7-8 hours.