This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X160STC, 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 SI40X160STC
The AirTAC Airtac SI40 Standard Cylinder SI40X160STC 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 SAI40X160STC, 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 → SAI40X160STC
- 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 SI40X160STC
The AirTAC SI40X160STC is a discontinued double-acting ISO 15552 profile cylinder featuring a 40mm bore, 160mm stroke, and a TC trunnion mount. Delivering 628N push force at 0.5MPa, it is replaced by the SAI40X160STC. This direct upgrade keeps the exact ISO 15552 mounting interface, G1/4 port, and output force.
The SAI replacement adds an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. The SAI family also introduces SAIL lock, SAIF valve, and BSAI clamp-lock variants absent in the SI line. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X160STC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X160STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X160STC |
| 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 SAI40X160STC 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 SAI40X160STC 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 SI40X160STC
| 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 SI40X160STC Is Used
Package Diversion
Actuates routing gates on packaging lines, using the 160mm stroke to shift boxes smoothly between belts.
Clamp Actuation
Provides reliable clamping force for light machining fixtures, delivering 628N push at 0.5MPa.
Stopper Arms
Controls pallet flow in distribution hubs by raising and lowering stopper mechanisms on cue.
Replacing the Airtac SI40 Standard Cylinder SI40X160STC with the SAI40X160STC
To replace the SI40X160STC, order the SAI40X160STC. Verify the ISO 15552 TC trunnion interface, 40mm bore, 160mm stroke, G1/4 port, and the -S magnet for CS1-B/DS1-B switches. For sizing, a 50mm bore yields 982N push at 0.5MPa, while a 32mm bore offers 402N. A plain cylinder drifts on air loss; the 27mm cushions only decelerate. For load holding, use an external rod lock or the SAIL/BSAI variants. At 160mm stroke, side-load risks are low, but ensure guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X160STC
- ✓ 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 SI40X160STC FAQ
Yes, the SI40X160STC is discontinued. The direct replacement is the SAI40X160STC, which shares the same ISO 15552 TC mounting interface, 40mm bore, 160mm stroke, and G1/4 port.
The 40mm bore has a G1/4 port. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X160STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X160STC replacement — usually within 7-8 hours.