This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X250SFTC, 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 SI160 Standard Cylinder SI160X250SFTC
The AirTAC SI160 Standard Cylinder SI160X250SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X250SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X250SFTC
- 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 SI160 Standard Cylinder SI160X250SFTC
The AirTAC SI160X250SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 250 mm stroke. It delivers a robust 10053 N push force at 0.5 MPa via a G3/4 port. Because this SI unit is end-of-life, you should order the direct replacement: SAI160X250SFTC. It shares the same ISO 15552 mounting interface, M36x2 rod thread, and 50 mm cushions.
The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for lower start-up pressure and extended life. For holding loads, note that a standard cylinder drifts without air; the cushion only decelerates. Use the SAIL or BSAI lock variants if needed.
Airtac SI160 Standard Cylinder SI160X250SFTC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X250SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X250SFTC |
| Bore size | Ø160 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI160X250SFTC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 kgf | |
The SAI160X250SFTC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI160 Standard Cylinder SI160X250SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×250 | 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 SI160 Standard Cylinder SI160X250SFTC Is Used
Heavy Stamping Press
Drives large heavy-duty stamping and forming dies requiring high thrust and stable 250 mm displacement in automotive tooling.
Large Clamp Actuator
Secures bulky fabricated steel frames during welding, using the FTC trunnion mount to absorb off-center side loading.
Replacing the Airtac SI160 Standard Cylinder SI160X250SFTC with the SAI160X250SFTC
To replace the SI160X250SFTC, order the SAI160X250SFTC. Confirm the ISO 15552 FTC trunnion mount, 250 mm stroke, G3/4 port, and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). When sizing, check neighbouring bores: a 125 mm bore yields 6136 N push at 0.5 MPa, while a 200 mm bore yields 15708 N. This 160 mm bore provides 10053 N. For load holding on air loss, add an external rod lock or pilot check valve, as the cushion only decelerates. The 250 mm stroke is under the 300 mm threshold, so standard rod-bending side-load risks are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X250SFTC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI160 Standard Cylinder SI160X250SFTC FAQ
Yes, the AirTAC SI160X250SFTC is discontinued. The direct replacement is the SAI160X250SFTC. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 250 mm stroke, G3/4 port, and FTC mounting interface.
Operating at 30-500 mm/s, it delivers 10053 N push and 9425 N pull at 0.5 MPa. At 0.7 MPa push is 14074 N, and 18095 N at 0.9 MPa. The theoretical maximum force is 2050 kgf at 1.0 MPa, with a 50 mm adjustable cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X250SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X250SFTC replacement — usually within 7-8 hours.