This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X45S, 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 SI100X45S
The AirTAC Airtac SI100 Standard Cylinder SI100X45S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 45mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X45S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X45S
- 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 SI100X45S
The AirTAC SI100X45S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 45mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a G1/2 port and an integrated piston magnet for position sensing. The direct replacement is the SAI100X45S, which matches the original bore, stroke, force, port, and ISO 15552 mounting interface exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds lock and valve variants (SAIL, BSAI, SAIF) unavailable in the SI line, and supports Viton H seals for high-temperature duties.
Airtac SI100 Standard Cylinder SI100X45S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X45S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X45S |
| Bore size | Ø100 mm |
| Stroke | 45 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 SAI100X45S 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 SAI100X45S 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 SI100X45S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×45 | 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 SI100X45S Is Used
Heavy Pressing
Applies up to 7068 N at 0.9 MPa for seating bearings or forming components in automated machinery.
Pallet Diverting
Short 45mm stroke pushes heavy pallets onto secondary lines using the 100mm bore output.
Replacing the Airtac SI100 Standard Cylinder SI100X45S with the SAI100X45S
To replace the SI100X45S, order the SAI100X45S and verify your ISO 15552 mounting fixtures, G1/2 port, and M20x1.5 rod thread. The -S suffix means a magnet is present for legacy CS1-B/DS1-B sensors; the SAI replacement uses current AirTAC switches. If you need more force than the 3927 N at 0.5 MPa (or 5497 N at 0.7 MPa), step up to a 125mm bore, or drop to an 80mm bore if 2513 N suffices. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads safely.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X45S
- ✓ 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 SI100X45S FAQ
Yes, the AirTAC SI100X45S is discontinued. The direct replacement is the SAI100X45S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 45mm stroke, output force, G1/2 port, and mounting interface.
The 100mm bore features a G1/2 air port. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, at 0.9 MPa it is 7068 N, and the theoretical maximum is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X45S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X45S replacement — usually within 7-8 hours.