This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X600, 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 SI40X600
The AirTAC Airtac SI40 Standard Cylinder SI40X600 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X600, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X600
- 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 SI40X600
The AirTAC SI40X600 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 600mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X600, matching the interface, output and mounting exactly.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. The SAI family also adds SAIL, SAIF and BSAI variants absent from the SI line. Note this non-magnet SKU cannot accept sensors.
Airtac SI40 Standard Cylinder SI40X600 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X600 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X600 |
| Bore size | Ø40 mm |
| Stroke | 600 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 SAI40X600 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 SAI40X600 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 SI40X600
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×600 | 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 SI40X600 Is Used
Material Diversion
Pushes packages on a 600mm stroke line.
Parts Ejection
Ejects machined components from a fixture over a long travel before the secondary robotic pickup.
Replacing the Airtac SI40 Standard Cylinder SI40X600 with the SAI40X600
To replace this SI40X600, order the SAI40X600 ensuring the ISO 15552 mounting interface, 40mm bore, 600mm stroke, G1/4 port and mounting accessories match. Because this 600mm stroke is long, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. If sizing up or down, neighbouring bores are 32mm and 50mm. This non-magnet version cannot take CS1-B/DS1-B switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X600
- ✓ 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 SI40X600 FAQ
Yes, the SI40X600 is discontinued. The direct replacement is the SAI40X600, which shares the same ISO 15552 mounting interface, 40mm bore, 600mm stroke, force and G1/4 port.
It has a 16mm rod, M12x1.25 thread, 27mm cushion, G1/4 port and 30-800 mm/s speed. Force ratings are 628N push / 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a max of 128kgf at 1.0MPa.
Request a Quote for the SAI40X600
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X600 replacement — usually within 7-8 hours.