This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X80TC, 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 SI40X80TC
The AirTAC Airtac SI40 Standard Cylinder SI40X80TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X80TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X80TC
- 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 SI40X80TC
The AirTAC SI40X80TC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke and TC trunnion mount. Delivering 628 N push force at 0.5 MPa through a G1/4 port, it is directly replaced by the SAI40X80TC. The SAI direct retains the exact ISO 15552 mounting interface, bore, and output force, fitting existing fixtures perfectly.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For this non-magnet SKU, position sensing is impossible.
Airtac SI40 Standard Cylinder SI40X80TC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X80TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X80TC |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAI40X80TC 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 SAI40X80TC 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 SI40X80TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SI40X80TC Is Used
Package Diverting
Uses the 80 mm stroke and 628 N push force to push parcels cleanly between conveyor lanes without overpowering lightweight packaging.
Clamp Actuation
Provides reliable clamping pressure for small machined parts, utilising the TC trunnion mount to handle slight pivoting offsets.
Gate Control
Operates lightweight sorting gates and material flow stops where a compact 40 mm bore and moderate speed are optimal.
Replacing the Airtac SI40 Standard Cylinder SI40X80TC with the SAI40X80TC
To replace the SI40X80TC, order the SAI40X80TC. Verify the ISO 15552 TC trunnion interface, 40 mm bore, 80 mm stroke, G1/4 port (PT/G/NPT thread options), and note this SKU lacks a magnet so it cannot accept CS1-B/DS1-B sensors. If you need more force, the neighbouring 50 mm bore offers 982 N push at 0.5 MPa; if less is required, the 32 mm bore provides 402 N. Remember, a standard cylinder does not hold load without live air— the cushion only decelerates. For load holding, explore the SAIL lock or BSAI clamp-lock variants, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X80TC
- ✓ 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 SI40X80TC FAQ
Yes, the SI40X80TC is discontinued. The direct replacement is the SAI40X80TC. It shares the same ISO 15552 mounting interface, 40 mm bore, 80 mm stroke, G1/4 port, and TC trunnion mount, fitting directly into your existing fixtures.
The 40 mm bore features a G1/4 air port and a 16 mm rod. It delivers 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X80TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X80TC replacement — usually within 7-8 hours.