This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1400, 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 SI40X1400
The AirTAC Airtac SI40 Standard Cylinder SI40X1400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1400mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1400
- 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 SI40X1400
The AirTAC SI40X1400 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 1400 mm stroke. Because 1400 mm exceeds the 1200 mm standard maximum for this bore, it is a non-standard, made-to-order length. It delivers 628 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40X1400, which shares the exact ISO 15552 mounting interface, bore, stroke, force and port size for seamless fixture integration.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Without a -S magnet, this specific SKU cannot accept a position sensor. For applications needing load holding on air loss, consider the SAIL or BSAI lock variants, as standard cushions only decelerate.
Airtac SI40 Standard Cylinder SI40X1400 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1400 |
| Bore size | Ø40 mm |
| Stroke | 1400 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 SAI40X1400 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 SAI40X1400 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 SI40X1400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1400 | 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 SI40X1400 Is Used
Extended Reach Push
Drives materials across wide gantry spaces on assembly lines where a 1400 mm traverse is required to bridge adjacent workstations.
High Bay Extraction
Extracts tote boxes from deep racking in automated storage systems, utilizing the 628 N push force at 0.5 MPa to slide loads out.
Vertical Lowering
Lowers lightweight fixtures up to 32 kg in vertical lift applications, relying on external guides to manage the long 1400 mm rod extension.
Replacing the Airtac SI40 Standard Cylinder SI40X1400 with the SAI40X1400
To replace the discontinued SI40X1400, order the SAI40X1400. Confirm the ISO 15552 mounting interface, the 40 mm bore, the 1400 mm non-standard stroke, the G1/4 port (available in PT, G, or NPT), and your mounting accessory (such as LB foot or TC trunnion). This SKU lacks a magnet (-S), so it cannot support CS1-B/DS1-B sensors; if sensing is required, specify a magnet on the SAI order. For sizing alternatives, a 32 mm bore yields 402 N push at 0.5 MPa, while a 50 mm bore provides 982 N. Because this is a 1400 mm long stroke, external guides are strongly recommended to prevent rod bending and excessive side loads. Note that a standard cylinder drifts without live air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1400
- ✓ 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 SI40X1400 FAQ
Yes, the AirTAC SI40X1400 is discontinued. The direct replacement is the SAI40X1400. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 1400 mm stroke, 628 N force, G1/4 port and mounting interface.
The bore is 40 mm with a G1/4 air port. Force ratings are: 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. The rod is 16 mm with an M12x1.25 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1400 replacement — usually within 7-8 hours.