This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX70S, 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 SI100AX70S
The AirTAC Airtac SI100 Standard Cylinder SI100AX70S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX70S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX70S
- 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 SI100AX70S
The AirTAC SI100AX70S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 70mm stroke, delivering 3927 N push force at 0.5 MPa through its G1/2 port. It features a SUS420J2 stainless steel piston rod and a built-in magnet for legacy CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI100AX70S, a direct upgrade retaining the exact interface, bore, stroke, force, port and mounting fixtures.
The SAI replacement incorporates an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and valve variants, including SAIL, SAIF and BSAI, which the original SI line lacked.
Airtac SI100 Standard Cylinder SI100AX70S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX70S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX70S |
| Bore size | Ø100 mm |
| Stroke | 70 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 SAI100AX70S 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 SAI100AX70S 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 SI100AX70S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SI100AX70S Is Used
Heavy Press Clamping
Ideal for exerting high clamping force on automotive or heavy machinery components, utilizing the 3927 N push force at 0.5 MPa to secure parts during machining.
Pallet Lift Stations
Drives short-stroke vertical lifting of heavy loads up to 200 kg in material handling lines, where the 70mm stroke provides precise positioning without excessive retraction space.
Stainless Rod Forming
The SUS420J2 stainless steel rod option suits humid or mildly corrosive forming environments, preventing surface degradation during repeated high-force pressing cycles.
Replacing the Airtac SI100 Standard Cylinder SI100AX70S with the SAI100AX70S
To replace the SI100AX70S, order the SAI100AX70S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 70mm stroke, G1/2 port threads (PT/G/NPT) and the -S magnet requirement. The SAI is dimensionally interchangeable per ISO 15552 and fits existing fixtures. If sizing up or down, note the 80mm bore yields 2513 N push while the 125mm yields 6136 N at 0.5 MPa. This -A variant uses a SUS420J2 stainless rod; default is carbon steel. A plain cylinder drifts on air loss as the cushion only decelerates, so for load holding specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX70S
- ✓ 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 SI100AX70S FAQ
Yes, the SI100AX70S is discontinued. The direct replacement is the SAI100AX70S. It shares the same ISO 15552 mounting interface, 100mm bore, 70mm stroke, output force, G1/2 port and accessories, fitting directly into your existing fixtures.
This 100mm bore cylinder features a G1/2 air port. The thrust ratings 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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX70S replacement — usually within 7-8 hours.