This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1450STC, 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 SI40X1450STC
The AirTAC Airtac SI40 Standard Cylinder SI40X1450STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1450mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1450STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1450STC
- 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 SI40X1450STC
The AirTAC SI40X1450STC is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1450mm stroke. Because 1450mm exceeds the 1200mm standard maximum for this bore, it is a non-standard, made-to-order unit. It delivers 628N push and 528N pull at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X1450STC, matching the exact ISO 15552 mounting interface, TC trunnion, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S code denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X1450STC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1450STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1450STC |
| Bore size | Ø40 mm |
| Stroke | 1450 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 SAI40X1450STC 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 SAI40X1450STC 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 SI40X1450STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1450 | 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 SI40X1450STC Is Used
Long-Stroke Material Transfer
Pushes workpieces between processing stations over extended distances where a 1450mm reach is required.
High-Bay Shuttle Extraction
Acts as a deep-reach extractor for automated storage racks, utilizing the TC trunnion to pivot during travel.
Elevated Platform Lowering
Lowers light fixtures or tooling plates, relying on external guides to manage the 1450mm rod extension safely.
Replacing the Airtac SI40 Standard Cylinder SI40X1450STC with the SAI40X1450STC
To replace this SI40X1450STC, order the SAI40X1450STC keeping the 40mm bore, 1450mm stroke, G1/4 port, and TC trunnion mount. The SAI is dimensionally interchangeable per ISO 15552. If you need to size both ways, neighbouring bores are 32mm and 50mm; at 0.5MPa the 32mm yields 402N push while the 50mm yields 982N. Note this 1450mm length is non-standard and demands an external guide to prevent rod-bending under side-loads. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or SAIL/BSAI lock for load holding. The -S magnet works with CS1-B/DS1-B switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1450STC
- ✓ 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 SI40X1450STC FAQ
Yes, the AirTAC SI40X1450STC is discontinued. The direct replacement is the SAI40X1450STC. It shares the identical ISO 15552 mounting interface, 40mm bore, 1450mm stroke, output force, G1/4 port, and TC mount, fitting directly into existing fixtures.
This double-acting cylinder uses a G1/4 air port and features an M12x1.25 rod thread with 27mm adjustable cushions. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1450STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1450STC replacement — usually within 7-8 hours.