This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X160S, 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 SI40 Standard Cylinder SI40X160S
The AirTAC SI40 Standard Cylinder SI40X160S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X160S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X160S
- 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 SI40 Standard Cylinder SI40X160S
The AirTAC SI40X160S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 160mm stroke. Delivering 628N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI40X160S. This direct successor matches the exact interface, bore, stroke, force and mounting hardware.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family also introduces SAIL, SAIF and BSAI lock variants the SI lacked. This SI40X160S includes a magnet for CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X160S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X160S |
| Bore size | Ø40 mm |
| Stroke | 160 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI40X160S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAI40X160S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40X160S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SI40 Standard Cylinder SI40X160S Is Used
Package Diversion
Actuates routing gates on packaging lines, using the 160mm stroke to shift parcels smoothly between conveyors.
Clamp Actuation
Provides reliable clamping force for mid-weight machining fixtures, utilizing the 628N thrust at 0.5MPa.
Vertical Lift Stops
Controls stopping mechanisms in vertical material handling, safely managing loads around the 32kg threshold.
Replacing the Airtac SI40 Standard Cylinder SI40X160S with the SAI40X160S
To replace the SI40X160S, order the SAI40X160S. Verify the ISO 15552 mounting interface, 40mm bore, 160mm stroke, G1/4 port (PT/G/NPT thread), and the -S magnet for position sensing. If you need more force, the neighbouring 50mm bore yields 982N push at 0.5MPa; if less is acceptable, the 32mm bore provides 402N. Remember that a standard cylinder does not hold load without live air—the cushion only decelerates. For secure holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X160S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40X160S FAQ
Yes, the SI40X160S is discontinued. The direct replacement is the SAI40X160S. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 160mm stroke, force, G1/4 port and mounting fixtures.
This double-acting cylinder features a G1/4 air port. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X160S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X160S replacement — usually within 7-8 hours.