This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X117, 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 SI40X117
The AirTAC SI40 Standard Cylinder SI40X117 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 117mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X117, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke117 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X117
- 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 SI40X117
The AirTAC SI40X117 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 117mm stroke, delivering 628N push force at 0.5MPa via a G1/4 port. As this legacy unit is end-of-life, the direct replacement is the SAI40X117, which preserves the exact ISO 15552 mounting interface, bore, stroke, output force, and port size for seamless fixture integration.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note that this specific SI40X117 SKU lacks a magnet, so it cannot accept a CS1-B or DS1-B sensor. Furthermore, a standard cylinder will drift if air is lost; for load holding, consider the SAIL or BSAI lock variants.
Airtac SI40 Standard Cylinder SI40X117 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X117 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X117 |
| Bore size | Ø40 mm |
| Stroke | 117 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 SAI40X117 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 SAI40X117 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 SI40X117
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×117 | 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 SI40X117 Is Used
Compact Part Ejection
Uses the 628N push force at 0.5MPa to reliably eject small machined components from a fixture without overpowering the part.
Package Diverting
Executes 117mm strokes to push light cartons between conveyor lanes, benefiting from the 30-800mm/s speed range for rapid cycling.
Light Material Handling
Lifts or positions shallow totes using the 32kg vertical lift capacity, fitting neatly into tight automation cells via its ISO 15552 mount.
Replacing the Airtac SI40 Standard Cylinder SI40X117 with the SAI40X117
To replace the discontinued SI40X117, order the SAI40X117. Verify your existing ISO 15552 mounting accessory (LB foot, FA/FB flange, CA/CB clevis, or TC trunnion), the G1/4 air port thread (PT, G, or NPT), and the M12x1.25 rod-end connection. Because this 117mm stroke is non-standard, expect a potential lead time for the custom length. If sizing up or down, the neighbouring 32mm bore yields 402N push at 0.5MPa, while the 50mm bore provides 982N. This plain SKU has no magnet and cannot support position sensing; if you require switches, select an SAI40X117S. For load-holding upon air loss, a plain cylinder relies only on its cushions for end-of-stroke deceleration and will drift—specify an external pilot check valve, or choose the SAIL or BSAI locking variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X117
- ✓ 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 SI40X117 FAQ
Yes, the SI40X117 is discontinued. The direct replacement is the SAI40X117. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 40mm bore, 117mm stroke, 628N force, and G1/4 port size to fit existing fixtures perfectly.
The 40mm bore features a G1/4 air port and an M12x1.25 rod thread. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum force of 128kgf at 1.0MPa.
Request a Quote for the SAI40X117
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X117 replacement — usually within 7-8 hours.