This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X320STC, 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 SI100 Standard Cylinder SI100X320STC
The AirTAC Airtac SI100 Standard Cylinder SI100X320STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 320mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X320STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke320 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X320STC
- 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 SI100 Standard Cylinder SI100X320STC
The AirTAC SI100X320STC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 3927 N push force at 0.5 MPa through its G1/2 port. AirTAC replaced this end-of-life unit with the SAI100X320STC, a direct sharing the exact bore, stroke, TC trunnion mount, and interface dimensions.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and valve variants like the SAIL and BSAI that the legacy SI lacked.
Airtac SI100 Standard Cylinder SI100X320STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X320STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X320STC |
| Bore size | Ø100 mm |
| Stroke | 320 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100X320STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X320STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100X320STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×320 | 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 SI100 Standard Cylinder SI100X320STC Is Used
Heavy Press Ejection
Provides the robust 3927 N push force required to eject dense stamped metal parts from heavy press dies.
Pallet Diversion
Actuates large TC trunnion-mounted diverter arms to route heavy loaded pallets between conveyor lines.
Vertical Lift Gates
Raises and lowers substantial security or climate gates, safely moving masses near the 200 kg vertical limit.
Replacing the Airtac SI100 Standard Cylinder SI100X320STC with the SAI100X320STC
To replace the SI100X320STC, order the SAI100X320STC, confirming the ISO 15552 TC trunnion mount, 320 mm stroke, G1/2 port, and the -S magnet for CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). If downsizing, the 80 mm bore yields 2513 N push at 0.5 MPa; if upsizing, the 125 mm bore provides 6136 N. Note that a plain cylinder drifts without live air—use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. Because the 320 mm stroke is long, use an external guide to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X320STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100X320STC FAQ
Yes, the SI100X320STC is discontinued. The direct replacement is the SAI100X320STC. It is dimensionally interchangeable per ISO 15552, retaining the same bore, stroke, force, G1/2 port, and TC mounting interface.
This double-acting cylinder uses a G1/2 port. It delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X320STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X320STC replacement — usually within 7-8 hours.