This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X161S, 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 SI100X161S
The AirTAC Airtac SI100 Standard Cylinder SI100X161S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 161mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X161S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke161 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X161S
- 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 SI100X161S
The AirTAC SI100X161S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 161mm stroke, and a G1/2 port. Generating 3927 N of push force at 0.5 MPa, this extruded aluminum barrel unit is replaced by the SAI100X161S. The SAI is a direct upgrade, matching the exact bore, stroke, output force, port size, and ISO 15552 mounting interface to fit existing fixtures perfectly.
The SAI replacement upgrades longevity with two Y-shaped one-way piston seals for low start-up pressure. The SAI family also introduces SAIL, SAIF, and BSAI lock variants the SI lacked. Your SI100X161S includes a piston magnet for CS1-B/DS1-B switches, though the SAI successor uses current AirTAC sensors.
Airtac SI100 Standard Cylinder SI100X161S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X161S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X161S |
| Bore size | Ø100 mm |
| Stroke | 161 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 SAI100X161S 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 SAI100X161S 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 SI100X161S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×161 | 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 SI100X161S Is Used
Heavy Press Clamping
Ideal for securing heavy metal components during machining, utilizing the 5497 N push force at 0.7 MPa to hold workpieces firmly against cutting loads.
Package Diverters
Powers heavy-duty diverter arms on high-throughput packaging lines, using the 161mm stroke to fully route large industrial cartons across belts.
Replacing the Airtac SI100 Standard Cylinder SI100X161S with the SAI100X161S
To replace the discontinued SI100X161S, order the SAI100X161S and confirm the ISO 15552 mounting interface, 100mm bore, 161mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. The included -S magnet works with legacy CS1-B/DS1-B switches. When sizing, neighboring bores offer different forces: an 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore yields 6136 N. This 100mm bore provides 3927 N push and 3681 N pull at 0.5 MPa, or 5497 N at 0.7 MPa. Note that a plain cylinder does not hold load on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SAIF self-valve option is also available for bores up to 100mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X161S
- ✓ 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 SI100X161S FAQ
Yes, the SI100X161S is discontinued. The direct replacement is the SAI100X161S. It is dimensionally interchangeable per ISO 15552, maintaining the same 100mm bore, 161mm stroke, output force, G1/2 port, and mounting interface. You simply order the SAI equivalent.
The G1/2 port is fixed by the 100mm bore. It delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X161S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X161S replacement — usually within 7-8 hours.