This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X400FTC, 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 SI160X400FTC
The AirTAC SI160 Standard Cylinder SI160X400FTC 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 SAI160X400FTC, 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 → SAI160X400FTC
- 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 SI160X400FTC
The AirTAC SI160X400FTC is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 400 mm stroke. It delivers 10053 N push force at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI160X400FTC, a direct sharing the same FTC trunnion mount, M36x2 thread, and 2050 kgf max force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this no-magnet SKU cannot accept a sensor; legacy -S types used CS1-B/DS1-B switches. A Viton H seal option raises the temperature limit to 150 C.
Airtac SI160 Standard Cylinder SI160X400FTC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X400FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X400FTC |
| 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 SAI160X400FTC 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 SAI160X400FTC 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 SI160X400FTC
| 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 SI160X400FTC Is Used
Heavy Press Operations
Drives large stamping and forming presses requiring up to 18095 N of thrust at 0.7 MPa, utilizing the 400 mm stroke to fully cycle heavy tooling.
Large Clamp Fixtures
Secures oversized components during machining using the FTC trunnion mount to absorb complex moments while clamping with 9425 N pull force.
Replacing the Airtac SI160 Standard Cylinder SI160X400FTC with the SAI160X400FTC
To replace the SI160X400FTC, order the SAI160X400FTC. It drops into existing fixtures via the identical ISO 15552 FTC trunnion interface, 160 mm bore, 400 mm stroke, and G3/4 port. If you need more force, the neighboring 200 mm bore offers 15708 N at 0.5 MPa; if less is required, the 125 mm bore provides 6136 N. Because this is a 400 mm stroke, use an external guide to prevent rod bending and side-load wear. This plain cylinder lacks a magnet and cannot take a sensor. For load holding on air loss, the cushion only decelerates; add an external pilot check valve or use the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X400FTC
- ✓ 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 SI160X400FTC FAQ
Yes, the SI160X400FTC is discontinued. The direct replacement is the SAI160X400FTC. It shares the exact ISO 15552 FTC mounting interface, 160 mm bore, 400 mm stroke, G3/4 port, and force ratings, fitting existing fixtures perfectly while upgrading the piston seal.
The G3/4 port feeds a 40 mm rod delivering 10053 N push and 9425 N pull at 0.5 MPa. At 0.7 MPa push is 14074 N, and 18095 N at 0.9 MPa. The theoretical max is 2050 kgf at 1.0 MPa. Speed is 30-500 mm/s, and the adjustable cushion is 50 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X400FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X400FTC replacement — usually within 7-8 hours.