This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X250SFA, 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 SI160X250SFA
The AirTAC SI160 Standard Cylinder SI160X250SFA 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 SAI160X250SFA, 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 → SAI160X250SFA
- 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 SI160X250SFA
The AirTAC SI160X250SFA is a discontinued double-acting ISO 15552 profile cylinder featuring a 160 mm bore and 250 mm stroke. Built for heavy-duty motion, it delivers 10053 N of thrust at 0.5 MPa and uses a G3/4 air port with an M36x2 rod thread. AirTAC ended the SI line, making the direct replacement the SAI160X250SFA. This current-production SAI model shares the exact ISO 15552 mounting interface, bore, stroke, force, port and FA flange accessory, fitting existing fixtures perfectly.
The SAI upgrade introduces an improved piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Beyond standard operation, the SAI family adds variants the SI lacked, such as the SAIL air-released lock and BSAI clamp-lock for secure holding. The -S magnet supports legacy CS1-B/DS1-B sensors, while Viton H seals can raise the operating temperature to 150 C.
Airtac SI160 Standard Cylinder SI160X250SFA Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X250SFA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X250SFA |
| 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 SAI160X250SFA 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 SAI160X250SFA 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 SI160X250SFA
| 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 SI160X250SFA Is Used
Heavy Press Forming
Drives large stamping and forming presses requiring up to 10053 N of thrust at 0.5 MPa, utilizing the 250 mm stroke to seat heavy tooling.
Industrial Clamp Rigging
Secures oversized fabricated structural components during welding or machining, using the FA flange mount to stabilize heavy assemblies.
Replacing the Airtac SI160 Standard Cylinder SI160X250SFA with the SAI160X250SFA
To replace the discontinued SI160X250SFA, order the SAI160X250SFA. Verify the ISO 15552 interface, 160 mm bore, 250 mm stroke, G3/4 port, and FA flange mounting. The -S magnet equips it for CS1-B/DS1-B switches, though the SAI replacement uses current AirTAC sensors. Sizing both ways: stepping down to a 125 mm bore yields 6136 N push at 0.5 MPa, while stepping up to 200 mm provides 15708 N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding, specify an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. With a 250 mm stroke, ensure guide alignment to prevent rod-bending side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X250SFA
- ✓ 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 SI160X250SFA FAQ
Yes, the SI160X250SFA is discontinued. The direct replacement is the SAI160X250SFA. It shares the identical ISO 15552 mounting interface, 160 mm bore, 250 mm stroke, output force, G3/4 port, and FA flange mounting, fitting directly into your existing fixtures.
This 160 mm bore cylinder features a G3/4 air port and an M36x2 rod thread. The thrust ratings are: 10053 N push and 9425 N pull at 0.5 MPa; 14074 N push at 0.7 MPa; 18095 N push at 0.9 MPa; and a theoretical maximum force of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X250SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X250SFA replacement — usually within 7-8 hours.