This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX400S, 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 SI160BX400S
The AirTAC SI160 Standard Cylinder SI160BX400S 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 SAI160BX400S, 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 → SAI160BX400S
- 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 SI160BX400S
The AirTAC SI160BX400S 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 via a G3/4 port. The direct is the SAI160BX400S, retaining identical ISO 15552 mounting dimensions, stroke, and output. This unit includes a SUS304 stainless piston rod (-B) and a piston magnet (-S) for CS1-B/DS1-B switches.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. Note that air cushions only decelerate; use a pilot check valve or SAIL lock variant to hold loads.
Airtac SI160 Standard Cylinder SI160BX400S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX400S |
| 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 SAI160BX400S 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 SAI160BX400S 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 SI160BX400S
| 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 SI160BX400S Is Used
Heavy Machinery Forming
Drives large press beds or heavy forming platens requiring 10053 N of push force at 0.5 MPa over a 400 mm travel distance.
Automated Clamp Actuation
Actuates massive part clamps on machining centers, utilizing the SUS304 stainless rod for corrosion resistance in coolant environments.
Replacing the Airtac SI160 Standard Cylinder SI160BX400S with the SAI160BX400S
To replace the SI160BX400S, order the SAI160BX400S. Verify the ISO 15552 interface, 400 mm stroke, G3/4 port, and M36x2 rod thread. The -B denotes a SUS304 rod, and -S means a magnet for CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). If downsizing, a 125 mm bore yields 6136 N push at 0.5 MPa; if upsizing, a 200 mm bore gives 15708 N. At 400 mm stroke, use external guides to prevent rod bending and side loads. For load holding on air loss, specify a SAIL or BSAI lock variant, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX400S
- ✓ 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 SI160BX400S FAQ
Yes, the SI160BX400S is discontinued. The direct replacement is the SAI160BX400S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 400 mm stroke, force, G3/4 port, and mounting interface.
The bore is 160 mm with a G3/4 port. Force ratings are: 10053 N push and 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, 18095 N push at 0.9 MPa, and a theoretical max of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX400S replacement — usually within 7-8 hours.