This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50N, 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 SI100X50N
The AirTAC Airtac SI100 Standard Cylinder SI100X50N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X50N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X50N
- 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 SI100X50N
The AirTAC SI100X50N is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 50 mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a Ø25 mm rod, M20x1.5 thread, and a G1/2 port. The direct replacement is the SAI100X50N, matching the exact bore, stroke, force, port, and ISO 15552 mounting interface for seamless fixture integration.
This NBR-sealed (-N) SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure. For load holding, note that cushions only decelerate; use SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100X50N Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50N |
| Bore size | Ø100 mm |
| Stroke | 50 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 SAI100X50N 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 SAI100X50N 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 SI100X50N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SI100X50N Is Used
Heavy Press Operations
Ideal for high-force pressing and stamping tasks requiring 3927 N of push force at 0.5 MPa within a compact 50 mm stroke.
Large Product Diversion
Robust 100 mm bore profile cylinder provides the necessary thrust to deflect heavy pallets or large workpieces on automated lines.
Replacing the Airtac SI100 Standard Cylinder SI100X50N with the SAI100X50N
To replace the SI100X50N, order the SAI100X50N, confirming the ISO 15552 interface, 50 mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. This non-magnetic SKU cannot take a sensor. For sizing, the 100 mm bore yields 3927 N push at 0.5 MPa; a neighbouring 80 mm bore provides 2513 N. Remember, a plain cylinder drifts on air loss—cushions only decelerate. For held loads, use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50N
- ✓ 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 SI100X50N FAQ
Yes, the SI100X50N is discontinued. The direct replacement is the SAI100X50N. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 50 mm stroke, G1/2 port, and mounting interface.
The 100 mm bore features 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 maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50N replacement — usually within 7-8 hours.