This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X390, 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 SI160X390
The AirTAC SI160 Standard Cylinder SI160X390 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 390mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X390, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke390 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X390
- 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 SI160X390
The AirTAC SI160X390 is a discontinued double-acting ISO 15552 profile cylinder, delivering a robust 10053 N push force at 0.5 MPa through its 160 mm bore and 390 mm stroke. This legacy unit features a 40 mm carbon steel rod, M36x2 thread, and a G3/4 air port. Because this specific SKU lacks a magnet (-S), it cannot accept position sensors. AirTAC replaced it with the SAI160X390, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and port size.
The SAI160X390 introduces an upgraded piston seal utilizing two Y-shaped one-way elements for extended lifespan and lower start-up pressure. For applications requiring heat resistance, Viton H seals elevate operating temperatures from 70 C to 150 C. The SAI family also adds lock variants like the SAIL and BSAI that the original SI line lacked.
Airtac SI160 Standard Cylinder SI160X390 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X390 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X390 |
| Bore size | Ø160 mm |
| Stroke | 390 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 SAI160X390 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 SAI160X390 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 SI160X390
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×390 | 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 SI160X390 Is Used
Heavy Machinery Forming
Drives large forming presses requiring substantial thrust, delivering 14074 N at 0.7 MPa to shape thick metal components reliably.
Automated Clamp Actuation
Actuates massive clamping fixtures on machining lines, utilizing the 50 mm adjustable air cushions to decelerate heavy masses smoothly.
Replacing the Airtac SI160 Standard Cylinder SI160X390 with the SAI160X390
To replace the SI160X390, order the SAI160X390, confirming the ISO 15552 mounting interface, 390 mm stroke, and G3/4 port. Retain your original mounting accessories (LB, FA, or TC) as the dimensions match perfectly. Since this SKU has no magnet, it cannot support legacy CS1-B or DS1-B sensors; if sensing is needed, specify an SAI with the S magnet option. When sizing, a neighboring 200 mm bore offers higher force, while dropping to 125 mm reduces the footprint but yields less power. At 0.5 MPa, this 160 mm bore generates 10053 N push and 9425 N pull. Note that a plain cylinder does not hold load without live air; for drop protection, use an external pilot check valve or explore the SAIL air-released lock variant. Finally, at 390 mm stroke, prevent rod bending by guiding the load externally to avoid side-loading.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X390
- ✓ 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 SI160X390 FAQ
Yes, the SI160X390 is discontinued. The direct replacement is the SAI160X390. It features the same ISO 15552 mounting interface, 160 mm bore, 390 mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 160 mm bore generates a push of 10053 N and pull of 9425 N at 0.5 MPa. At 0.7 MPa push is 14074 N, and 18095 N at 0.9 MPa. The theoretical max force is 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s, and it uses a G3/4 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X390
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X390 replacement — usually within 7-8 hours.