This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X1250S, 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 SI160X1250S
The AirTAC SI160 Standard Cylinder SI160X1250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 1250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X1250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke1250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X1250S
- 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 SI160X1250S
The AirTAC SI160X1250S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 1250 mm stroke. Delivering 10053 N push force at 0.5 MPa via a G3/4 port, it is directly replaced by the SAI160X1250S direct. This current-production SAI model retains identical ISO 15552 mounting dimensions, bore, stroke, output force, and accessories, fitting existing fixtures perfectly.
The SAI upgrade features a redesigned piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors. For load holding, note that a plain cylinder drifts on air loss; the air cushion only decelerates. Use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI160 Standard Cylinder SI160X1250S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X1250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X1250S |
| Bore size | Ø160 mm |
| Stroke | 1250 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 SAI160X1250S 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 SAI160X1250S 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 SI160X1250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×1250 | 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 SI160X1250S Is Used
Heavy Press Systems
Drives large press platens requiring 14074 N push force at 0.7 MPa, utilizing the 50 mm adjustable cushions to halt heavy masses smoothly.
Pallet Transfer
Moves loaded pallets over 1250 mm cycles; the 40 mm carbon steel rod handles high thrust, though external guides are mandatory for this length.
Replacing the Airtac SI160 Standard Cylinder SI160X1250S with the SAI160X1250S
To replace the SI160X1250S, order the SAI160X1250S. Confirm the ISO 15552 mounting interface, the 160 mm bore, the 1250 mm stroke, the G3/4 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, TC, etc.). The -S magnet equates to legacy CS1-B/DS1-B switches, while the SAI family uses current AirTAC sensors. Sizing both ways: a 125 mm bore yields 6136 N push @0.5 MPa, whereas a 200 mm bore yields 15708 N. Because this 1250 mm stroke exceeds 300 mm, prevent rod bending by guiding the load externally to avoid side loads. For suspended loads that must not drift on air loss, select the SAIL or BSAI lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X1250S
- ✓ 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 SI160X1250S FAQ
Yes, the SI160X1250S is discontinued. The direct replacement is the AirTAC SAI160X1250S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 1250 mm stroke, G3/4 port, and mounting interface.
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 is 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X1250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X1250S replacement — usually within 7-8 hours.