This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X610, 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 SI40X610
The AirTAC Airtac SI40 Standard Cylinder SI40X610 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 610mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X610, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke610 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X610
- 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 SI40X610
The AirTAC SI40X610 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 610mm stroke. It delivers 628N push force at 0.5MPa through a G1/4 port. The direct replacement is the SAI40X610, matching the exact interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. This non-magnet SKU cannot take a sensor.
Airtac SI40 Standard Cylinder SI40X610 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X610 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X610 |
| Bore size | Ø40 mm |
| Stroke | 610 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 SAI40X610 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 SAI40X610 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 SI40X610
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×610 | 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 SI40X610 Is Used
Material Diversion
Actuates routing gates on packaging lines, utilizing the 628N push force to deflect cartons at 0.5 MPa operating pressure.
Long-Stroke Ejection
Ejects machined components from fixtures, requiring external guide rails to mitigate rod bending across the 610mm extension.
Replacing the Airtac SI40 Standard Cylinder SI40X610 with the SAI40X610
To replace the SI40X610, order the SAI40X610. Confirm the ISO 15552 mounting interface, 40mm bore, 610mm stroke, G1/4 port (PT/G/NPT), and accessory type. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. For sizing, the 32mm bore yields 402N [email protected], while the 50mm bore yields 982N. At 610mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X610
- ✓ 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 SI40X610 FAQ
Yes, the SI40X610 is discontinued. The direct replacement is the SAI40X610, a true ISO 15552 profile cylinder that matches the 40mm bore, 610mm stroke, 628N force, G1/4 port, and mounting dimensions for a seamless fixture swap.
The 40mm bore uses a G1/4 port. Force output is 628N push and 528N pull at 0.5 MPa, 879N push at 0.7 MPa, 1130N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Request a Quote for the SAI40X610
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X610 replacement — usually within 7-8 hours.