This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50, 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 SI100X50
The AirTAC SI100 Standard Cylinder SI100X50 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 SAI100X50, 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 → SAI100X50
- 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 SI100X50
The AirTAC SI100X50 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke. Delivering 3927N push force at 0.5MPa, it features a Ø25mm rod, M20x1.5 thread, and a G1/2 port. The direct replacement is the SAI100X50, which matches the exact ISO 15552 mounting interface, bore, stroke, output force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note this non-magnet SKU cannot accept a sensor. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X50 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50 |
| 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 SAI100X50 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 SAI100X50 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 SI100X50
| 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 SI100X50 Is Used
Heavy Press Operations
Ideal for driving heavy stamping or press dies requiring 3927N of push force at 0.5MPa over a short 50mm travel distance.
Pallet Stopper Arms
Provides robust stopping power for heavy-loaded pallet conveyors, utilizing the 100mm bore's high thrust to halt momentum safely.
Industrial Clamp Fixtures
Secures large workpieces in machining centers, delivering reliable clamping force with its 36mm adjustable air cushions absorbing end-of-stroke impact.
Replacing the Airtac SI100 Standard Cylinder SI100X50 with the SAI100X50
To replace the SI100X50, order the SAI100X50. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port thread (PT, G, or NPT), and note this non-magnet version cannot take a CS1-B or DS1-B switch. Sizing both ways: the 100mm bore yields 3927N push at 0.5MPa, while the neighboring 80mm bore offers 2513N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variant. The SAIF variant integrates a 4M valve if you need self-actuation.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50
- ✓ 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 SI100X50 FAQ
Yes, the AirTAC SI100X50 is discontinued. The direct replacement is the SAI100X50. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 50mm stroke, 3927N force, G1/2 port, and mounting interface.
The 100mm bore uses a G1/2 port. At 0.5MPa it provides 3927N push and 3681N pull force. At 0.7MPa push is 5497N, and at 0.9MPa it is 7068N. The theoretical maximum force is 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50 replacement — usually within 7-8 hours.