This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1315S, 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 SI40X1315S
The AirTAC Airtac SI40 Standard Cylinder SI40X1315S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1315mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1315S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1315 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1315S
- 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 SI40X1315S
The AirTAC SI40X1315S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1315mm stroke. Because 1315mm exceeds the 1200mm standard maximum for this bore, it is a non-standard made-to-order unit. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X1315S, retaining identical ISO 15552 mounting dimensions, output force, and accessories.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For load holding, note that a standard cylinder drifts without live air; the cushion only decelerates. You can use the SAIL or BSAI lock variants, or an external rod lock. The -S suffix means it has a piston magnet for CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X1315S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1315S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1315S |
| Bore size | Ø40 mm |
| Stroke | 1315 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 SAI40X1315S 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 SAI40X1315S 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 SI40X1315S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1315 | 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 SI40X1315S Is Used
Long-Reach Diversion
Pushes packages across transfer lines over a 1315mm span, utilizing the 628N force to deflect heavy cartons reliably at speed.
High-Bay Extraction
Extracts totes from deep shelving racks. The extended stroke reaches deep bins while the magnetic sensor confirms full extension.
Vertical Material Lowering
Lowers components from overhead conveyors.
Replacing the Airtac SI40 Standard Cylinder SI40X1315S with the SAI40X1315S
To replace the SI40X1315S, order the SAI40X1315S. Confirm the ISO 15552 interface, 40mm bore, 1315mm stroke, G1/4 port, and mounting accessory. The -S magnet equates to legacy CS1-B/DS1-B switches; the SAI uses current AirTAC switches. Sizing both ways: a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. This 1315mm stroke exceeds the 1200mm standard and requires external guides to prevent rod bending under side loads. For load holding on air loss, add a pilot check valve or specify the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1315S
- ✓ 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 SI40X1315S FAQ
Yes, the SI40X1315S is discontinued. The direct replacement is the AirTAC SAI40X1315S. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 1315mm stroke, G1/4 port, and mounting fixtures for a seamless swap.
It features a G1/4 air port and M12x1.25 rod thread. Force output is 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1315S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1315S replacement — usually within 7-8 hours.