This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX200S, 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 SI40AX200S
The AirTAC SI40 Standard Cylinder SI40AX200S 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 SAI40AX200S, 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 → SAI40AX200S
- 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 SI40AX200S
The AirTAC SI40AX200S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 200mm stroke. It delivers 628N push force at 0.5MPa, features a G1/4 port, and includes a SUS420J2 stainless piston rod (-A) alongside a piston magnet (-S) for legacy CS1-B/DS1-B sensors.
The direct replacement is the SAI40AX200S, matching the bore, stroke, force, port, and ISO 15552 mounting interface. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Note that plain cylinders drift without live air; use the SAIL lock variant or an external rod lock for load holding.
Airtac SI40 Standard Cylinder SI40AX200S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX200S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX200S |
| 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 SAI40AX200S 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 SAI40AX200S 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 SI40AX200S
| 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 SI40AX200S Is Used
Stainless Rod Actuation
Ideal for packaging machines needing the SUS420J2 stainless rod option to resist moisture while providing 628N push force for clamping operations.
Material Diversion
Provides reliable 200mm stroke diversion gates on conveyors, utilizing the built-in magnet for position sensing and adjustable cushions.
Replacing the Airtac SI40 Standard Cylinder SI40AX200S with the SAI40AX200S
To replace the SI40AX200S, order the SAI40AX200S. Verify your ISO 15552 mounting fixtures (LB, FA, TC, etc.), the G1/4 air port, and the M12x1.25 rod thread. The -S magnet enables current AirTAC switches (replacing legacy CS1-B/DS1-B), and the -A rod denotes SUS420J2 stainless steel. If you need more force, the 50mm bore offers 982N push at 0.5MPa; if less is required, the 32mm bore provides 402N. Because this is a 200mm stroke, ensure adequate guide support to prevent rod bending under side loads. A plain cylinder does not hold load on air loss; for secure holding, select the SAIL (air-released lock) or BSAI (clamp-lock) variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX200S
- ✓ 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 SI40AX200S FAQ
Yes, the AirTAC SI40AX200S is discontinued. The direct replacement is the SAI40AX200S. It features the same ISO 15552 mounting interface, 40mm bore, 200mm stroke, G1/4 port, and force ratings, but adds an upgraded two Y-shaped element piston seal for lower start-up pressure.
The 40mm bore features a G1/4 air port. At 0.5 MPa it provides 628N push and 528N pull force. At 0.7 MPa push is 879N, and at 0.9 MPa push is 1130N. The theoretical maximum force is 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX200S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX200S replacement — usually within 7-8 hours.