This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX270S, 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 SI100AX270S
The AirTAC Airtac SI100 Standard Cylinder SI100AX270S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 270mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX270S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX270S
- 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 SI100AX270S
The AirTAC SI100AX270S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 270mm stroke, and a SUS420J2 stainless steel rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100AX270S. This direct upgrade shares the exact ISO 15552 mounting interface, G1/2 port, and output force, fitting existing fixtures perfectly.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Your -S magnet works with legacy CS1-B/DS1-B sensors, while the SAIL lock variant covers load-holding needs.
Airtac SI100 Standard Cylinder SI100AX270S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX270S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX270S |
| Bore size | Ø100 mm |
| Stroke | 270 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 SAI100AX270S 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 SAI100AX270S 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 SI100AX270S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×270 | 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 SI100AX270S Is Used
Heavy-Duty Pressing
Drives large stamping and forming dies requiring substantial thrust, utilizing the 3927 N push force at 0.5 MPa to seat heavy components firmly.
Stainless Rod Washdown
Actuates clamps in food or chemical processing lines where the SUS420J2 stainless piston rod provides necessary corrosion resistance.
Replacing the Airtac SI100 Standard Cylinder SI100AX270S with the SAI100AX270S
To replace the SI100AX270S, order the SAI100AX270S. Verify the ISO 15552 interface, 100mm bore, 270mm stroke, G1/2 port, M20x1.5 thread, and the -S magnet for CS1-B/DS1-B switches. The -A rod specifies SUS420J2 stainless steel. Sizing both ways: the 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore yields 6136 N. At 270mm stroke, use guide rails to prevent rod bending and side loads. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX270S
- ✓ 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 SI100AX270S FAQ
Yes, the SI100AX270S is discontinued. The direct replacement is the SAI100AX270S. It shares the identical ISO 15552 mounting interface, 100mm bore, 270mm stroke, output force, and G1/2 port, so it drops directly into your existing fixtures.
The 100mm bore provides 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s, and the air cushion travel is 36 mm at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX270S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX270S replacement — usually within 7-8 hours.