This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X350STC, 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 SI100X350STC
The AirTAC Airtac SI100 Standard Cylinder SI100X350STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X350STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X350STC
- 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 SI100X350STC
The AirTAC SI100X350STC is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 350 mm stroke. It delivers 3927 N of push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X350STC, a direct upgrade retaining the exact ISO 15552 mounting interface, TC trunnion, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent from the SI line, and accepts current AirTAC switches via its magnet groove (legacy SI used CS1-B/DS1-B sensors).
Airtac SI100 Standard Cylinder SI100X350STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X350STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X350STC |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAI100X350STC 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 SAI100X350STC 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 SI100X350STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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 SI100X350STC Is Used
Pallet Diversion
Shifts heavy pallets laterally across transfer lines using the 3927 N push force and TC trunnion mount to handle the 350 mm traverse.
Press Ejection
Ejects formed metal parts from press beds, utilizing the adjustable 36 mm air cushions to decelerate the rod smoothly at stroke ends.
Replacing the Airtac SI100 Standard Cylinder SI100X350STC with the SAI100X350STC
To replace the SI100X350STC, order the SAI100X350STC. Confirm the ISO 15552 TC trunnion mounting, 350 mm stroke, G1/2 port, and the -S magnet for switch sensing. If you need more force, the neighboring 125 mm bore provides 6136 N at 0.5 MPa; if less is required, the 80 mm bore offers 2513 N. A plain cylinder drifts on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 350 mm stroke is long, use an external guide to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X350STC
- ✓ 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 SI100X350STC FAQ
Yes, the SI100X350STC is discontinued. The direct replacement is the SAI100X350STC. It shares the same ISO 15552 mounting interface, 100 mm bore, 350 mm stroke, G1/2 port, and output force, fitting directly into existing fixtures.
This 100 mm bore cylinder uses a G1/2 port. It generates a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X350STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X350STC replacement — usually within 7-8 hours.