This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX270, 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 SI100AX270
The AirTAC Airtac SI100 Standard Cylinder SI100AX270 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 SAI100AX270, 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 → SAI100AX270
- 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 SI100AX270
The AirTAC SI100AX270 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 270 mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX270, matching the bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This SKU has a SUS420J2 stainless rod and no magnet, so it cannot take a sensor.
Airtac SI100 Standard Cylinder SI100AX270 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX270 |
| 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 SAI100AX270 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 SAI100AX270 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 SI100AX270
| 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 SI100AX270 Is Used
Heavy Press Clamping
Generates 5497 N at 0.7 MPa to secure heavy metalwork during machining operations.
Pallet Diverting
Robust 100 mm profile barrel handles lateral diverting forces on high-capacity conveyor lines.
Material Lift Gates
Lifts loading dock gates safely with a 2356 N working load margin and 270 mm travel.
Replacing the Airtac SI100 Standard Cylinder SI100AX270 with the SAI100AX270
To replace the SI100AX270, order the SAI100AX270 and confirm the ISO 15552 mounting interface, 270 mm stroke, G1/2 port (PT/G/NPT) and mounting accessory. This SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B switches. For sizing, a 100 mm bore yields 3927 N push at 0.5 MPa; if less force is needed, an 80 mm bore gives 2513 N. For 270 mm strokes, ensure guide support to prevent rod bending and side loads. The air cushion only decelerates; for load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX270
- ✓ 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 SI100AX270 FAQ
Yes, the SI100AX270 is discontinued. The direct replacement is the SAI100AX270, which matches the 100 mm bore, 270 mm stroke, force, G1/2 port and ISO 15552 mounting interface.
It has a G1/2 port. Forces are: 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX270
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX270 replacement — usually within 7-8 hours.