This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50SFB, 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 SI100X50SFB
The AirTAC Airtac SI100 Standard Cylinder SI100X50SFB 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 SAI100X50SFB, 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 → SAI100X50SFB
- 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 SI100X50SFB
The AirTAC SI100X50SFB is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke. It delivers a push force of 3927 N at 0.5 MPa and features a G1/2 port. AirTAC replaced this legacy unit with the SAI100X50SFB, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, force, port and FB flange mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This FB-flanged unit includes a piston magnet for CS1-B/DS1-B legacy sensors, and Viton H seal options exist for high-heat duties.
Airtac SI100 Standard Cylinder SI100X50SFB Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50SFB |
| 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 SAI100X50SFB 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 SAI100X50SFB 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 SI100X50SFB
| 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 SI100X50SFB Is Used
Heavy-Duty Pressing
Applies the 3927 N push force at 0.5 MPa to seat bearings and assemble large components securely.
High-Force Diversion
Handles robust product diverting on heavy material handling lines using the FB flange mount for stability.
Replacing the Airtac SI100 Standard Cylinder SI100X50SFB with the SAI100X50SFB
To replace the discontinued SI100X50SFB, order the SAI100X50SFB. Verify the ISO 15552 interface, 100mm bore, 50mm stroke, G1/2 port, FB flange mounting, and the -S magnet for CS1-B/DS1-B switches. Sizing both ways: a neighbouring 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore offers 6136 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50SFB
- ✓ 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 SI100X50SFB FAQ
Yes, the SI100X50SFB is discontinued. The direct replacement is the SAI100X50SFB. It shares the identical ISO 15552 mounting interface, 100mm bore, 50mm stroke, output force, G1/2 port, and FB flange, fitting existing fixtures perfectly.
This double-acting cylinder features a G1/2 port. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push 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 SAI100X50SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50SFB replacement — usually within 7-8 hours.