This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X200H, 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 SI40X200H
The AirTAC SI40 Standard Cylinder SI40X200H 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 SAI40X200H, 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 → SAI40X200H
- 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 SI40X200H
The AirTAC SI40X200H is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 200 mm stroke. Because this legacy unit is end-of-life, you should order the direct replacement SAI40X200H. It preserves the exact ISO 15552 mounting interface, 628 N push force at 0.5 MPa, and G1/4 port size. This specific SKU features a Viton H seal for high-temperature environments up to 150 C.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note that this non-magnet version cannot accept a sensor, and the SAI family adds SAIL, SAIF, and BSAI variants absent from the SI line.
Airtac SI40 Standard Cylinder SI40X200H Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X200H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X200H |
| 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 SAI40X200H 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 SAI40X200H 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 SI40X200H
| 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 SI40X200H Is Used
Hot Stamp Ejection
Uses the Viton H high-temperature seal to reliably push 628 N at 0.5 MPa when ejecting parts from heated molding zones up to 150 C.
Diversion Gate Actuation
Provides robust 200 mm travel to divert packages on a line, operating safely within the 377 N working load limit.
Replacing the Airtac SI40 Standard Cylinder SI40X200H with the SAI40X200H
To replace the discontinued SI40X200H, specify the SAI40X200H to retain the 40 mm bore, 200 mm stroke, M12x1.25 rod thread, and G1/4 port. Confirm your ISO 15552 mounting accessory (LB, FA, TC, etc.) and the high-temperature Viton H seal requirement (0-150 C). Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. If you need more force, the 50 mm bore offers 982 N push at 0.5 MPa; if less is acceptable, the 32 mm bore provides 402 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider an external pilot check valve or the SAIL/BSAI lock variants. At 200 mm stroke, side-load risks are low, but ensure proper guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X200H
- ✓ 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 SI40X200H FAQ
Yes, the AirTAC SI40X200H is discontinued. The direct replacement is the SAI40X200H. It shares the same ISO 15552 mounting interface, 40 mm bore, 200 mm stroke, G1/4 port, and output force, fitting directly into existing fixtures.
The 40 mm bore features a G1/4 air port and an M12x1.25 rod thread. It delivers 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 maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X200H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X200H replacement — usually within 7-8 hours.