This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X315S, 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 SI100X315S
The AirTAC Airtac SI100 Standard Cylinder SI100X315S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 315mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X315S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke315 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X315S
- 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 SI100X315S
The AirTAC SI100X315S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore and 315mm stroke. It delivers a robust 3927 N push force at 0.5 MPa and utilizes a G1/2 air port. Because this legacy SI unit is end-of-life, AirTAC now supplies the SAI100X315S as the direct replacement. The SAI retains the same ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures perfectly.
The SAI100X315S upgrade introduces a refined piston seal with two Y-shaped one-way elements for extended lifespan and lower start-up pressure. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent from the SI line. Your SI100X315S includes a piston magnet for CS1-B/DS1-B sensors, while the SAI accepts current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X315S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X315S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X315S |
| Bore size | Ø100 mm |
| Stroke | 315 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 SAI100X315S 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 SAI100X315S 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 SI100X315S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×315 | 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 SI100X315S Is Used
Heavy Press Staging
Ideal for positioning heavy metal blanks at press stations, utilizing the 3927 N push force to shift substantial masses smoothly into the tooling area.
Pallet Diversion
Drives robust routing gates on high-capacity conveyor lines, where the 315mm stroke provides ample travel to redirect large pallets reliably.
Replacing the Airtac SI100 Standard Cylinder SI100X315S with the SAI100X315S
To replace the discontinued SI100X315S, order the SAI100X315S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port thread (PT, G, or NPT), and the M20x1.5 rod-end connection. The SAI is dimensionally interchangeable per ISO 15552 and retains the 315mm stroke. Because this stroke exceeds 300mm, prevent rod bending by using an external guide to absorb side loads. If sizing alternatives, the 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore offers 6136 N. Note that a plain cylinder drifts on air loss; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X315S
- ✓ 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 SI100X315S FAQ
Yes, the SI100X315S is discontinued. The direct replacement is the SAI100X315S. It shares the identical ISO 15552 mounting interface, 100mm bore, 315mm stroke, force, and G1/2 port, dropping straight into existing machinery.
This 100mm bore cylinder uses a G1/2 air port. It generates a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. 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 SAI100X315S
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