This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X70S, 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 SI100X70S
The AirTAC Airtac SI100 Standard Cylinder SI100X70S 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 SAI100X70S, 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 → SAI100X70S
- 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 SI100X70S
The AirTAC SI100X70S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore and 70mm stroke. Delivering 3927N push force at 0.5MPa, it includes a piston magnet for CS1-B/DS1-B switches and a G1/2 port. AirTAC replaced this legacy unit with the SAI100X70S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, force, and accessories.
The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces SAIL, SAIF, and BSAI variants absent in the SI line. Rod material options include carbon steel, SUS420J2, or SUS304.
Airtac SI100 Standard Cylinder SI100X70S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X70S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X70S |
| 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 SAI100X70S 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 SAI100X70S 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 SI100X70S
| 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 SI100X70S Is Used
Heavy Press Clamping
Ideal for securing heavy metal components during machining, utilizing the 3927N push force at 0.5MPa to hold parts firmly against cutting loads.
Package Diverters
Drives robust routing arms on high-throughput conveyor lines, using the 70mm stroke to quickly push heavy cartons onto secondary tracks.
Replacing the Airtac SI100 Standard Cylinder SI100X70S with the SAI100X70S
To replace the SI100X70S, order the SAI100X70S and confirm the ISO 15552 mounting interface, 70mm stroke, G1/2 port, and your mounting accessory (LB, FA, TC, etc.). The -S suffix means a magnet is present for CS1-B/DS1-B sensors; the SAI family uses current AirTAC switches. Sizing both ways: a neighboring 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. Note that a plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Viton H seals raise the temperature range to 0-150C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X70S
- ✓ 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 SI100X70S FAQ
Yes, the SI100X70S is discontinued. The direct replacement is the SAI100X70S. It shares the same ISO 15552 mounting interface, 100mm bore, 70mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/2 port. The force ratings are: push 3927N and pull 3681N at 0.5MPa, push 5497N at 0.7MPa, push 7068N at 0.9MPa, and a theoretical maximum of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X70S replacement — usually within 7-8 hours.