This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X200, 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 SI40X200
The AirTAC Airtac SI40 Standard Cylinder SI40X200 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X200, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X200
- 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 SI40X200
The AirTAC SI40X200 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 200mm stroke. It delivers 628N push and 528N pull at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI40X200, a direct sharing the same ISO 15552 mounting interface, bore, stroke, force and port. This SKU lacks the -S magnet, so it cannot accept a CS1-B/DS1-B sensor.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants absent in the SI line.
Airtac SI40 Standard Cylinder SI40X200 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X200 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X200 |
| Bore size | Ø40 mm |
| Stroke | 200 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 SAI40X200 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 SAI40X200 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 SI40X200
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SI40X200 Is Used
Package Diversion
Pushes light cartons at 30-800 mm/s on packaging lines, using the 628N push force to deflect goods without damaging contents.
Small Part Ejection
Ejects machined components from a fixture with a 200mm travel, relying on adjustable 27mm cushions to decelerate the rod end.
Stopper Gate Control
Acts as a pneumatic stop for pallets, where the 32kg safe vertical lift capacity handles gravity-loaded gates securely.
Replacing the Airtac SI40 Standard Cylinder SI40X200 with the SAI40X200
To replace the SI40X200, order the SAI40X200. Verify the ISO 15552 interface, 40mm bore, 200mm stroke, G1/4 port (PT/G/NPT) and mounting accessory. This no-magnet SKU cannot hold a switch. If sizing up or down, check 32mm or 50mm bores against the 628N push at 0.5MPa. Because this is a plain cylinder, it will drift on air loss; use a pilot check valve or SAIL/BSAI lock for holding. At 200mm stroke, rod side-load is low, but for any stroke over 300mm add a guide to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X200
- ✓ 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 SI40X200 FAQ
Yes, the SI40X200 is discontinued. The direct replacement is the SAI40X200. It shares the identical ISO 15552 mounting interface, 40mm bore, 200mm stroke, output force, G1/4 port and accessories, fitting existing fixtures perfectly.
The 40mm bore features a G1/4 air port and M12x1.25 rod thread. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a maximum theoretical force of 128kgf at 1.0MPa.
Request a Quote for the SAI40X200
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X200 replacement — usually within 7-8 hours.