This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50SFA, 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 SI100X50SFA
The AirTAC Airtac SI100 Standard Cylinder SI100X50SFA 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 SAI100X50SFA, 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 → SAI100X50SFA
- 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 SI100X50SFA
The AirTAC SI100X50SFA is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI100X50SFA, a direct upgrade retaining the exact interface, force, and mounting.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL and BSAI lock variants absent in the SI line. The -S magnet supports CS1-B/DS1-B switches, while the FA flange ensures rigid ISO 15552 mounting.
Airtac SI100 Standard Cylinder SI100X50SFA Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50SFA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50SFA |
| 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 SAI100X50SFA 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 SAI100X50SFA 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 SI100X50SFA
| 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 SI100X50SFA Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927N push force to maintain rigid clamping without flex.
Pallet Diverter
Actuates heavy-duty routing gates on automated assembly lines, providing reliable 50mm stroke movement for high-mass pallets.
Lift Gate Actuator
Controls the opening and closing of industrial loading dock gates, safely moving structures with a 200kg vertical lift capacity.
Replacing the Airtac SI100 Standard Cylinder SI100X50SFA with the SAI100X50SFA
To replace the SI100X50SFA, order the SAI100X50SFA. Verify the ISO 15552 FA flange mounting, G1/2 port, 50mm stroke, and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). Sizing both ways: this 100mm bore yields 3927N push at 0.5MPa; dropping to an 80mm bore gives 2513N, while increasing pressure to 0.7MPa provides 5497N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL/BSAI lock variants. The SAIF variant (bores 32-100) integrates a 4M valve if space is tight.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50SFA
- ✓ 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 SI100X50SFA FAQ
Yes, the SI100X50SFA is discontinued. The direct replacement is the SAI100X50SFA. It features the same ISO 15552 mounting interface, 100mm bore, 50mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
This 100mm bore cylinder uses a G1/2 air port. It delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50SFA replacement — usually within 7-8 hours.