This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X400, 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 SI160X400
The AirTAC SI160 Standard Cylinder SI160X400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 400mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X400
- 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 SI160X400
The AirTAC SI160X400 is a discontinued double-acting ISO 15552 profile cylinder, delivering a push force of 10053 N at 0.5 MPa. AirTAC replaced this legacy unit with the SAI160X400, a direct sharing the exact 160 mm bore, 400 mm stroke, G3/4 port and mounting interface. The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended lifespan.
Without a magnet suffix, this specific SKU cannot accept a position sensor. For applications requiring load holding on air loss, note that the standard cushion only decelerates the piston; you must use an external pilot check valve or the SAIL lock variant.
Airtac SI160 Standard Cylinder SI160X400 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X400 |
| Bore size | Ø160 mm |
| Stroke | 400 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 SAI160X400 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 SAI160X400 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 SI160X400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×400 | 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 SI160X400 Is Used
Heavy Stamping
Drives large presses and stamping dies requiring the full 18095 N push force at 0.9 MPa to form thick metal components.
Pallet Handling
Indexes loaded pallets along transfer lines, utilizing the 400 mm stroke to push heavy goods between conveyor zones.
Automated Clamping
Secures oversized machinery frames during machining operations, relying on the robust 40 mm piston rod for stability.
Replacing the Airtac SI160 Standard Cylinder SI160X400 with the SAI160X400
To replace the SI160X400, order the SAI160X400 and confirm the ISO 15552 mounting interface, bore, and 400 mm stroke. Verify your port thread (PT, G, or NPT) matches the G3/4 size, and select your mounting accessory (LB, FA, CA, TC, etc.). Since this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, order the SAI equivalent with an S suffix. Sizing both ways: the 160 mm bore yields 10053 N push at 0.5 MPa, while the neighbouring 125 mm bore provides 6136 N. For load holding without live air, explore the SAIL or BSAI lock variants. Because the 400 mm stroke exceeds 300 mm, incorporate external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X400
- ✓ 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 SI160X400 FAQ
Yes, the SI160X400 is discontinued. The direct replacement is the SAI160X400. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 400 mm stroke, output force, G3/4 port and mounting fixtures.
This double-acting cylinder uses a G3/4 air port. It delivers a push force of 10053 N and pull of 9425 N at 0.5 MPa, 14074 N at 0.7 MPa, 18095 N at 0.9 MPa, and a theoretical maximum of 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X400 replacement — usually within 7-8 hours.