This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1000S, 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 SI40X1000S
The AirTAC Airtac SI40 Standard Cylinder SI40X1000S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1000mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1000S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1000S
- 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 SI40X1000S
The AirTAC SI40X1000S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1000mm stroke. It delivers 628N push and 528N pull at 0.5MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI40X1000S, a direct sharing the exact interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X1000S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1000S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1000S |
| Bore size | Ø40 mm |
| Stroke | 1000 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 SAI40X1000S 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 SAI40X1000S 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 SI40X1000S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1000 | 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 SI40X1000S Is Used
Long-Stroke Diversion
Pushes packages across a 1-meter conveyor lane using the 628N push force at 0.5MPa, requiring external guides to prevent rod bending over the extended travel.
Pallet Transfer
Shifts lightweight pallets linearly along a 1000mm path, with the G1/4 port and 30-800mm/s speed ensuring smooth actuation.
Replacing the Airtac SI40 Standard Cylinder SI40X1000S with the SAI40X1000S
To replace the SI40X1000S, order the SAI40X1000S, confirming the ISO 15552 interface, 40mm bore, 1000mm stroke, G1/4 port, and mounting accessory. The -S magnet enables CS1-B/DS1-B sensors. At 0.5MPa it yields 628N push; a 50mm bore offers 982N if upsizing, while a 32mm bore provides 402N if downsizing. For this 1000mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1000S
- ✓ 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 SI40X1000S FAQ
Yes, the SI40X1000S is discontinued. The direct replacement is the SAI40X1000S. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 1000mm stroke, 628N force, G1/4 port, and mounting interface.
It features a 16mm rod, M12x1.25 thread, 27mm cushion, and G1/4 port. Force ratings are 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a max of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1000S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1000S replacement — usually within 7-8 hours.