This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X280SFTC, 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 SI100X280SFTC
The AirTAC Airtac SI100 Standard Cylinder SI100X280SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 280mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X280SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X280SFTC
- 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 SI100X280SFTC
The AirTAC SI100X280SFTC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a built-in piston magnet for CS1-B/DS1-B switches. Delivering 3927 N push and 3681 N pull at 0.5 MPa, it features a 100 mm bore, 280 mm stroke, G1/2 port, and FTC trunnion mount. AirTAC replaced this EOL unit with the SAI100X280SFTC.
The SAI100X280SFTC is a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, and port. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure. For load holding, note the cushion only decelerates; explore SAIL lock or BSAI clamp-lock variants.
Airtac SI100 Standard Cylinder SI100X280SFTC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X280SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X280SFTC |
| Bore size | Ø100 mm |
| Stroke | 280 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 SAI100X280SFTC 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 SAI100X280SFTC 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 SI100X280SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×280 | 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 SI100X280SFTC Is Used
Heavy Press Clamping
Secures heavy metal workpieces in machining fixtures, utilizing the 3927 N push force at 0.5 MPa to hold components firmly during milling or drilling operations.
Pallet Diverting
Actuates large diverter arms on high-capacity packaging conveyors, moving loaded pallets with a 280 mm stroke and FTC trunnion mounting for high side-load tolerance.
Replacing the Airtac SI100 Standard Cylinder SI100X280SFTC with the SAI100X280SFTC
To replace the discontinued SI100X280SFTC, order the SAI100X280SFTC direct. Confirm the ISO 15552 FTC trunnion mount, 100 mm bore, 280 mm stroke, G1/2 port, and the -S magnet for current AirTAC switches. If sizing up or down, neighboring bores are 80 mm and 125 mm; at 0.5 MPa this 100 mm bore yields 3927 N push and 3681 N pull. A plain cylinder drifts without live air, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI variants. At 280 mm stroke, verify side-load alignment to prevent rod bending and use guide rails.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X280SFTC
- ✓ 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 SI100X280SFTC FAQ
Yes, the SI100X280SFTC is discontinued. The direct replacement is the SAI100X280SFTC. It maintains the identical ISO 15552 mounting interface, 100 mm bore, 280 mm stroke, G1/2 port, and FTC mount, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/2 port. It delivers 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 max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X280SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X280SFTC replacement — usually within 7-8 hours.