This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X200SN, 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 SI40X200SN
The AirTAC Airtac SI40 Standard Cylinder SI40X200SN 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 SAI40X200SN, 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 → SAI40X200SN
- 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 SI40X200SN
The AirTAC SI40X200SN is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 200mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X200SN, retaining the same ISO 15552 mounting interface, bore, stroke, output force, and porting for existing fixtures.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -SN variant includes a piston magnet for CS1-B/DS1-B switches and NBR seals (-20 to +70 C). For high heat, Viton H seals are available, and the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X200SN Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X200SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X200SN |
| 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 SAI40X200SN 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 SAI40X200SN 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 SI40X200SN
| 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 SI40X200SN Is Used
Package Diversion
Actuates routing gates on packaging lines, using the 200mm stroke to shift boxes smoothly without overwhelming the 628 N force limit.
Small Part Clamping
Secures lightweight machined components during milling, providing reliable 377 N safe holding force while occupying minimal fixture space.
Vertical Lifting
Elevates 32 kg tote bins in pick-and-place modules, relying on the double-acting profile barrel for consistent upward thrust.
Replacing the Airtac SI40 Standard Cylinder SI40X200SN with the SAI40X200SN
To replace the SI40X200SN, order the SAI40X200SN. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), 200mm stroke, G1/4 port (PT/G/NPT), and the -S magnet for CS1-B/DS1-B sensors. The 40mm bore yields 628 N push at 0.5 MPa; if undersized, the 50mm bore offers 982 N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 200mm stroke, rod bending is low, but for any stroke over 300mm, add a guide to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X200SN
- ✓ 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 SI40X200SN FAQ
Yes, the AirTAC SI40X200SN is discontinued. The direct replacement is the SAI40X200SN. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 200mm stroke, 628 N force, and G1/4 port, so it fits existing fixtures perfectly.
The 40mm bore operates at 0.15-1.0 MPa with a G1/4 port. Force output is 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 max of 128 kgf at 1.0 MPa. It features a 16mm rod, M12x1.25 thread, and 27mm cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X200SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X200SN replacement — usually within 7-8 hours.