This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X250S, 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 SI160X250S
The AirTAC SI160 Standard Cylinder SI160X250S 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 SAI160X250S, 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 → SAI160X250S
- 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 SI160X250S
The AirTAC SI160X250S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160mm bore and 250mm stroke, delivering 10053N push force at 0.5MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI160X250S. This current-production direct maintains the exact ISO 15552 mounting interface, bore, stroke, output force, and port size to fit existing fixtures seamlessly.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for extended life and lower start-up pressure. The SAI family also adds SAIL and BSAI lock variants absent from the SI line, and a Viton H seal option expands the operating temperature to 150C.
Airtac SI160 Standard Cylinder SI160X250S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X250S |
| 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 SAI160X250S 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 SAI160X250S 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 SI160X250S
| 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 SI160X250S Is Used
Heavy Press Operations
Drives large stamping and forming presses requiring substantial thrust, utilizing the 14074N push force at 0.7MPa to shape thick metal components reliably.
Large Clamp Fixtures
Secures oversized industrial molds or heavy fabricated parts during machining, holding position firmly under continuous high-pressure operation.
Replacing the Airtac SI160 Standard Cylinder SI160X250S with the SAI160X250S
To replace the SI160X250S, order the SAI160X250S and verify your ISO 15552 mounting accessory (LB, FA, or TC), the G3/4 air port, and the M36x2 rod thread. Because this unit includes the -S magnet, it supports legacy CS1-B/DS1-B sensors, though the SAI replacement utilizes current AirTAC switches. When sizing, a neighboring 200mm bore offers higher thrust if needed, while a 125mm bore provides a lighter footprint. A plain cylinder drifts on air loss since the 50mm cushions only decelerate near stroke end; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. With a 250mm stroke, ensure adequate guide support to prevent rod bending under heavy lateral loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X250S
- ✓ 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 SI160X250S FAQ
Yes, the SI160X250S is discontinued. The direct replacement is the SAI160X250S. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 250mm stroke, output force, G3/4 port, and mounting interface to fit existing fixtures directly.
This double-acting cylinder operates at 30-500mm/s. The thrust ratings are 10053N push and 9425N pull at 0.5MPa, 14074N push at 0.7MPa, 18095N push at 0.9MPa, and a theoretical maximum of 2050kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X250S replacement — usually within 7-8 hours.