This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X600TC, 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 SI40X600TC
The AirTAC Airtac SI40 Standard Cylinder SI40X600TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X600TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X600TC
- 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 SI40X600TC
The AirTAC SI40X600TC is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 600mm stroke. Delivering 628N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI40X600TC. This direct successor matches the TC trunnion mount, bore, stroke and force exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X600TC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X600TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X600TC |
| Bore size | Ø40 mm |
| Stroke | 600 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 SAI40X600TC 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 SAI40X600TC 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 SI40X600TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×600 | 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 SI40X600TC Is Used
Long-Stroke Diversion
Pushes packages across a transfer line with its 600mm reach, utilizing the 628N thrust at 0.5MPa for steady actuation.
Pallet Push-Off
Mounts via the ISO 15552 TC trunnion to index loads off an accumulation bed, requiring external guides for the long rod.
Vertical Lowering
Lowers materials safely with a 32kg vertical lift capacity, relying on a pilot check valve to prevent drift on air loss.
Replacing the Airtac SI40 Standard Cylinder SI40X600TC with the SAI40X600TC
To replace the SI40X600TC, order the SAI40X600TC. Verify the ISO 15552 TC trunnion interface, 40mm bore, 600mm stroke, G1/4 port and thread type (PT/G/NPT). Because this SKU has no -S magnet, it cannot support position sensing. For sizing, a 32mm bore yields 402N at 0.5MPa, while a 50mm bore yields 982N. At 600mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X600TC
- ✓ 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 SI40X600TC FAQ
Yes, the SI40X600TC is discontinued. The direct replacement is the SAI40X600TC. It provides a dimensionally interchangeable ISO 15552 mounting interface, matching the 40mm bore, 600mm stroke, 628N force, G1/4 port and TC trunnion mount.
The 40mm bore uses a G1/4 port. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa. The piston rod is 16mm with an M12x1.25 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X600TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X600TC replacement — usually within 7-8 hours.