This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX70S, 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 SI100BX70S
The AirTAC Airtac SI100 Standard Cylinder SI100BX70S 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 SAI100BX70S, 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 → SAI100BX70S
- 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 SI100BX70S
The AirTAC SI100BX70S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 70mm stroke, and SUS304 stainless steel rod. Delivering 3927 N push at 0.5 MPa, it is replaced by the SAI100BX70S. This direct upgrade shares the same G1/2 port, M20x1.5 thread, and ISO 15552 mounting dimensions, fitting existing fixtures perfectly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI100 Standard Cylinder SI100BX70S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX70S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX70S |
| 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 SAI100BX70S 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 SAI100BX70S 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 SI100BX70S
| 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 SI100BX70S Is Used
Heavy Press Clamping
Secures large metal castings during machining, using the 3927 N push force at 0.5 MPa to hold parts rigidly against cutting loads.
Stamping Press Feed
Drives heavy material grippers in a short 70mm stroke cycle, moving sheet stock into a stamping press with reliable force.
Pallet Stop Gate
Acts as a high-force pneumatic stop for loaded pallets on a conveyor, with the SUS304 rod resisting humid washdown environments.
Replacing the Airtac SI100 Standard Cylinder SI100BX70S with the SAI100BX70S
To replace the SI100BX70S, order the SAI100BX70S. Verify the ISO 15552 mounting interface, 100mm bore, 70mm stroke, G1/2 port, and -S magnet for CS1-B/DS1-B switches. The SUS304 (-B) rod offers corrosion resistance over standard carbon steel. If downsizing, a 80mm bore yields 2513 N [email protected]; if upsizing, a 125mm bore yields 6136 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve for bores up to 100mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX70S
- ✓ 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 SI100BX70S FAQ
Yes, the SI100BX70S is discontinued. The direct replacement is the SAI100BX70S. It shares the same ISO 15552 mounting interface, 100mm bore, 70mm stroke, G1/2 port, and output force, fitting existing fixtures without modification.
The 100mm bore uses a G1/2 port. Force output is 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 SAI100BX70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX70S replacement — usually within 7-8 hours.