This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X155S, 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 SI100X155S
The AirTAC Airtac SI100 Standard Cylinder SI100X155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X155S
- 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 SI100X155S
The AirTAC SI100X155S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 155mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI100X155S, matching the interface, stroke and force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It adds SAIL, SAIF and BSAI variants the SI lacked. Your -S magnet works with CS1-B/DS1-B switches.
Airtac SI100 Standard Cylinder SI100X155S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X155S |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAI100X155S 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 SAI100X155S 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 SI100X155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SI100X155S Is Used
Heavy Press Clamping
Ideal for securing heavy fabrication parts during machining or welding, utilizing the 3927N push force at 0.5MPa.
Pallet Diversion
Provides robust actuation to push or divert heavy loaded pallets off a main conveyor line in material handling systems.
Replacing the Airtac SI100 Standard Cylinder SI100X155S with the SAI100X155S
To replace this SI100X155S, order the SAI100X155S. Confirm the ISO 15552 mounting interface, 155mm stroke, G1/2 port (PT/G/NPT threads) and your mounting accessory. The -S magnet enables CS1-B/DS1-B sensors. If sizing up or down, neighboring bores are 80mm (2513N [email protected]) and 125mm (6136N [email protected]). For load holding on air loss, note that a plain cylinder drifts; the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. As this stroke is under 300mm, severe rod-bending side loads are less likely, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X155S
- ✓ 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 SI100X155S FAQ
Yes, the SI100X155S is discontinued. The direct replacement is the SAI100X155S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 155mm stroke, G1/2 port and mounting hardware.
The bore is 100mm with a G1/2 port. Force output is 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a maximum theoretical force of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X155S replacement — usually within 7-8 hours.