This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X60STC, 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 SI40X60STC
The AirTAC Airtac SI40 Standard Cylinder SI40X60STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 60mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X60STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke60 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X60STC
- 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 SI40X60STC
The AirTAC SI40X60STC is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 60mm stroke. It delivers 628N push force at 0.5MPa through a G1/4 port. The direct replacement is the SAI40X60STC, matching the exact bore, stroke, force, port, and TC trunnion mounting interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp variants unavailable in the SI line.
Airtac SI40 Standard Cylinder SI40X60STC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X60STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X60STC |
| Bore size | Ø40 mm |
| Stroke | 60 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 SAI40X60STC 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 SAI40X60STC 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 SI40X60STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×60 | 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 SI40X60STC Is Used
Component Clamping
Ideal for securing mid-weight machined parts during milling or drilling, utilizing the 628N push force to hold firmly against cutting loads.
Package Diverting
Short 60mm stroke acts rapidly to push cartons off a main belt at transfer points without occupying excessive machine footprint.
Gate Actuation
Reliable 32kg vertical lift capacity makes it suitable for opening and closing lightweight sorting gates in distribution centers.
Replacing the Airtac SI40 Standard Cylinder SI40X60STC with the SAI40X60STC
To replace the SI40X60STC, order the SAI40X60STC. Confirm the ISO 15552 TC trunnion mounting, 60mm stroke, G1/4 port, and the -S magnet for CS1-B/DS1-B legacy sensors (the SAI uses current AirTAC switches). At 0.5MPa, this 40mm bore yields 628N push and 528N pull; if undersized, the neighboring 50mm bore provides 982N push. Note that a standard cylinder drifts on air loss as the cushion only decelerates; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X60STC
- ✓ 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 SI40X60STC FAQ
Yes, the SI40X60STC is discontinued. The direct replacement is the SAI40X60STC. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 60mm stroke, G1/4 port, and TC mounting interface.
This double-acting cylinder uses a G1/4 air port. It provides 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X60STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X60STC replacement — usually within 7-8 hours.