This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX250S, 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 SI160BX250S
The AirTAC SI160 Standard Cylinder SI160BX250S 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 SAI160BX250S, 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 → SAI160BX250S
- 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 SI160BX250S
The AirTAC SI160BX250S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 250 mm stroke. Delivering 10053 N push force at 0.5 MPa, it features a SUS304 stainless piston rod, a G3/4 port, and a piston magnet for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI160BX250S, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, and force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that plain cylinders drift without air; for load holding, explore the SAIL or BSAI lock variants the SI line lacked.
Airtac SI160 Standard Cylinder SI160BX250S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX250S |
| 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 SAI160BX250S 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 SAI160BX250S 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 SI160BX250S
| 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 SI160BX250S Is Used
Heavy Press Forming
Applies the 14074 N push force at 0.7 MPa to seat and form large metal components securely in automated stamping lines.
Pallet Lift Stations
Lifts loaded pallets up to the 512 kg vertical limit, utilizing the SUS304 rod for corrosion resistance in damp logistics environments.
Mold Clamping Fixtures
Holds heavy injection molds in place via the ISO 15552 mounting interface, relying on the 50 mm adjustable cushions for smooth end-of-stroke deceleration.
Replacing the Airtac SI160 Standard Cylinder SI160BX250S with the SAI160BX250S
To replace the discontinued SI160BX250S, order the SAI160BX250S, confirming the ISO 15552 interface, 250 mm stroke, G3/4 port, and SUS304 (-B) rod. The built-in magnet (-S) lets you mount legacy CS1-B/DS1-B sensors. Sizing both ways: this bore yields 10053 N push at 0.5 MPa; if undersized, a 200 mm bore offers 15708 N. Because stroke is 250 mm, ensure guide alignment to prevent rod bending. A plain cylinder does not hold load without live air—the cushion only decelerates. For secure holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX250S
- ✓ 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 SI160BX250S FAQ
Yes, the SI160BX250S is discontinued. The direct replacement is the SAI160BX250S. It shares the identical ISO 15552 mounting interface, 160 mm bore, 250 mm stroke, G3/4 port, and output force, fitting existing fixtures perfectly.
At 0.5 MPa it provides 10053 N push and 9425 N pull. At 0.7 MPa push is 14074 N, and at 0.9 MPa it is 18095 N. The theoretical max force is 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX250S replacement — usually within 7-8 hours.