This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1500, 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 SI40X1500
The AirTAC Airtac SI40 Standard Cylinder SI40X1500 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1500mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1500, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1500
- 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 SI40X1500
The AirTAC SI40X1500 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 1500 mm stroke. Because 1500 mm exceeds the 1200 mm standard maximum for this bore, it is a non-standard, made-to-order unit. It delivers 628 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40X1500, which matches the exact ISO 15552 mounting interface, stroke, force, and port size.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Since this specific SI SKU lacks the -S magnet suffix, it cannot accept a position switch. For high-heat environments, a Viton H seal option extends the temperature range up to 150 C.
Airtac SI40 Standard Cylinder SI40X1500 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1500 |
| Bore size | Ø40 mm |
| Stroke | 1500 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 SAI40X1500 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 SAI40X1500 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 SI40X1500
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1500 | 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 SI40X1500 Is Used
Long-Stroke Material Push
Ideal for transferring products across wide conveyor gaps, utilizing the 1500 mm reach and 628 N push force at 0.5 MPa to index heavy pallets.
High-Bay Diversion
Actuates sorting arms in automated storage systems where the 32 kg vertical lift capacity handles tote redirection reliably.
Guided Linear Positioning
Drives large format packaging stops, requiring external guide rails to support the extended 1500 mm rod and prevent binding under load.
Replacing the Airtac SI40 Standard Cylinder SI40X1500 with the SAI40X1500
To replace the discontinued SI40X1500, order the SAI40X1500. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G1/4 air port, and the M12x1.25 rod thread. Because this is a 1500 mm non-standard stroke exceeding the 1200 mm standard limit, expect made-to-order lead times. At 1500 mm, the rod is highly susceptible to bending under side loads; always use an external guide to prevent premature seal failure. Sizing both ways: if you need less force, a 32 mm bore offers 402 N push at 0.5 MPa; if you need more, a 50 mm bore provides 982 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, use an external pilot check valve, or specify the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1500
- ✓ 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 SI40X1500 FAQ
Yes, the AirTAC SI40X1500 is discontinued. The direct replacement is the SAI40X1500. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 1500 mm stroke, 628 N force, and G1/4 port for a seamless fixture swap.
This 40 mm bore double-acting cylinder uses a G1/4 port and provides 628 N push and 528 N pull at 0.5 MPa. At 0.7 MPa it pushes 879 N, and 1130 N at 0.9 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1500
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1500 replacement — usually within 7-8 hours.