This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X102, 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 SI40X102
The AirTAC Airtac SI40 Standard Cylinder SI40X102 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 102mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X102, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke102 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X102
- 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 SI40X102
The AirTAC SI40X102 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 102 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X102, matching the exact bore, stroke, force, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this specific SI40X102 SKU lacks a magnet, meaning it cannot accept CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X102 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X102 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X102 |
| Bore size | Ø40 mm |
| Stroke | 102 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 SAI40X102 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 SAI40X102 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 SI40X102
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×102 | 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 SI40X102 Is Used
Component Clamping
Secures medium-weight machined parts during milling or drilling, utilizing the 628 N push force at 0.5 MPa to hold firm against cutting loads.
Package Diverting
Actuates routing gates on 40 mm profile conveyor lines, providing reliable 102 mm stroke extension to redirect boxes at sorting junctions.
Pallet Stop Arms
Deploys mechanical stops at pallet transfer stations, using the 528 N pull force to retract the arm and allow pallet flow downstream.
Replacing the Airtac SI40 Standard Cylinder SI40X102 with the SAI40X102
To replace the discontinued SI40X102, order the SAI40X102. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 102 mm stroke, and the G1/4 port. Because this SKU has no -S magnet, it cannot support position sensing; if sensing is needed, select an SAI40X102S. The 40 mm bore yields 628 N push at 0.5 MPa; if more force is needed, step up to a 50 mm bore (982 N), or drop to a 32 mm bore (402 N) for lighter loads. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads. For specific self-valve needs, the SAIF variant includes a built-in 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X102
- ✓ 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 SI40X102 FAQ
Yes, the AirTAC SI40X102 is discontinued. The direct replacement is the SAI40X102. It shares the identical ISO 15552 mounting interface, 40 mm bore, 102 mm stroke, output force, and G1/4 port, fitting seamlessly into existing fixtures.
The 40 mm bore uses a G1/4 port and features a 16 mm rod. 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, with a theoretical max of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X102
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X102 replacement — usually within 7-8 hours.