This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X310S, 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 SI100X310S
The AirTAC Airtac SI100 Standard Cylinder SI100X310S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 310mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X310S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke310 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X310S
- 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 SI100X310S
The AirTAC SI100X310S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 310 mm stroke. It delivers a push force of 3927 N at 0.5 MPa and features a G1/2 port. AirTAC replaced this legacy unit with the SAI100X310S, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line. This -S model includes a piston magnet for CS1-B/DS1-B switches, though the SAI successor uses current AirTAC sensors.
Airtac SI100 Standard Cylinder SI100X310S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X310S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X310S |
| Bore size | Ø100 mm |
| Stroke | 310 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 SAI100X310S 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 SAI100X310S 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 SI100X310S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×310 | 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 SI100X310S Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927 N push force at 0.5 MPa to hold components rigidly against the fixture bed.
Pallet Diverting
Actuates heavy-duty diverter arms on automated packaging lines, with the 310 mm stroke providing the reach needed to redirect full pallets smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100X310S with the SAI100X310S
To replace the SI100X310S, order the SAI100X310S. Confirm the ISO 15552 mounting interface, 100 mm bore, 310 mm stroke, G1/2 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, FB, CA, CB, TC). The -S suffix means a magnet is present for legacy CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. For sizing both ways, neighbouring bores are 80 mm (2513 N push @0.5 MPa) and 125 mm (6136 N push @0.5 MPa). A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 310 mm stroke is long, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X310S
- ✓ 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 SI100X310S FAQ
Yes, the SI100X310S is discontinued. The direct replacement is the AirTAC SAI100X310S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100 mm bore, 310 mm stroke, output force, G1/2 port, and mounting accessories, so it drops directly into existing fixtures.
This double-acting cylinder operates at 0.15-1.0 MPa (proof 1.5 MPa) with a speed of 30-800 mm/s. Force outputs are: push 3927 N and pull 3681 N at 0.5 MPa, push 5497 N at 0.7 MPa, push 7068 N at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. It features a 25 mm rod, M20x1.5 thread, and 36 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X310S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X310S replacement — usually within 7-8 hours.