This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X110H, 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 SI40X110H
The AirTAC Airtac SI40 Standard Cylinder SI40X110H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 110mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X110H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke110 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X110H
- 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 SI40X110H
The AirTAC SI40X110H is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 110 mm stroke. It delivers 628 N push force at 0.5 MPa and features a G1/4 air port. The direct replacement is the SAI40X110H, which shares the exact ISO 15552 mounting interface, bore, stroke, force, and port size. This unit includes the Viton H high-temperature seal option, extending operation to 0-150 C.
The SAI upgrade introduces a refined piston seal using two Y-shaped one-way elements for lower start-up pressure and extended life. As this SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor.
Airtac SI40 Standard Cylinder SI40X110H Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X110H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X110H |
| Bore size | Ø40 mm |
| Stroke | 110 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 SAI40X110H 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 SAI40X110H 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 SI40X110H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×110 | 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 SI40X110H Is Used
High-Temperature Ejection
Utilizes the Viton H seal to eject molded parts from hot environments up to 150 C without degrading.
Mid-Force Clamping
Provides 628 N of push force at 0.5 MPa for securing medium workpieces during machining operations.
Package Diverting
Drives 110 mm stroke diverting arms to route lightweight to medium packages along production lines.
Replacing the Airtac SI40 Standard Cylinder SI40X110H with the SAI40X110H
To replace the SI40X110H, order the SAI40X110H. Verify the ISO 15552 mounting interface, 40 mm bore, 110 mm stroke, G1/4 port (PT/G/NPT thread), and your specific mounting accessory. Because this is a no-S SKU, it cannot host a magnetic sensor; if position detection is needed, select an SAI40X110HS or use external limit switches. The Viton H seal on this unit supports 0-150 C environments. When sizing, neighboring bores offer different capacities: a 32 mm bore provides 402 N push at 0.5 MPa, while a 50 mm bore yields 982 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X110H
- ✓ 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 SI40X110H FAQ
Yes, the AirTAC SI40X110H is discontinued. The direct replacement is the SAI40X110H. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 110 mm stroke, 628 N force, G1/4 port, and mounting interface.
The 40 mm bore features a G1/4 air port, a 16 mm rod, and M12x1.25 rod thread. Force output is 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X110H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X110H replacement — usually within 7-8 hours.