This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X500TC, 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 SI40X500TC
The AirTAC Airtac SI40 Standard Cylinder SI40X500TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 500mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X500TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X500TC
- 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 SI40X500TC
The AirTAC SI40X500TC is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 500mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X500TC, matching the exact bore, stroke, force, port, and TC trunnion mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor.
Airtac SI40 Standard Cylinder SI40X500TC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X500TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X500TC |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAI40X500TC 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 SAI40X500TC 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 SI40X500TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 SI40X500TC Is Used
Long-Stroke Diversion
Pushes packages across transfer lines with a 500mm reach, utilizing the 628N force at 0.5MPa for reliable lateral movement.
Pallet Push-Off
Acts as a discharge cylinder for palletizing cells, moving lightweight loads horizontally via the TC trunnion mount to accommodate pivoting alignment.
Material Lowering
Lowers components using gravity assist, where the 27mm adjustable air cushions safely decelerate the 40mm rod at the end of the 500mm stroke.
Replacing the Airtac SI40 Standard Cylinder SI40X500TC with the SAI40X500TC
To replace the SI40X500TC, order the SAI40X500TC. Confirm the ISO 15552 TC trunnion mount, 40mm bore, 500mm stroke, G1/4 port (PT/G/NPT), and M12x1.25 rod thread. Since this SKU lacks a -S magnet, it cannot accept CS1-B/DS1-B sensors. At 500mm stroke, prevent rod bending by using an external guide to absorb side loads. Sizing both ways: a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. For load holding on air loss, note the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X500TC
- ✓ 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 SI40X500TC FAQ
Yes, the SI40X500TC is discontinued. The direct replacement is the SAI40X500TC. It is dimensionally interchangeable per ISO 15552, keeping the same 40mm bore, 500mm stroke, G1/4 port, force, and TC mounting interface.
The bore is 40mm with a G1/4 port. Force output is 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. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X500TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X500TC replacement — usually within 7-8 hours.