This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X120STC, 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 SI100X120STC
The AirTAC Airtac SI100 Standard Cylinder SI100X120STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 120mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X120STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X120STC
- 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 SI100X120STC
The AirTAC SI100X120STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 120mm stroke. Delivering 3927 N of push force at 0.5 MPa through a G1/2 port, it is replaced by the SAI100X120STC. This direct successor matches the exact ISO 15552 mounting interface, TC trunnion, output force, and stroke.
The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X120STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X120STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X120STC |
| Bore size | Ø100 mm |
| Stroke | 120 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 SAI100X120STC 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 SAI100X120STC 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 SI100X120STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×120 | 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 SI100X120STC Is Used
Heavy Press Clamping
Applies the 3927 N push force at 0.5 MPa to secure heavy metal components during machining or stamping operations.
Pallet Diverting
Uses the 120mm stroke and TC trunnion mount to push standard pallets smoothly across transfer lines at up to 800 mm/s.
Replacing the Airtac SI100 Standard Cylinder SI100X120STC with the SAI100X120STC
To replace the SI100X120STC, order the SAI100X120STC. Verify your ISO 15552 TC trunnion mounting, 120mm stroke, G1/2 port threads (PT/G/NPT), and the -S magnet for CS1-B/DS1-B sensors. If sizing up or down, neighbouring bores (80mm or 125mm) alter the 0.5 MPa push force from 2513 N to 6136 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. For any stroke over 300mm, add external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X120STC
- ✓ 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 SI100X120STC FAQ
Yes, the SI100X120STC is discontinued. The direct replacement is the SAI100X120STC. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100mm bore, 120mm stroke, G1/2 port, and TC mount.
The G1/2 port supplies a push force of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa push is 5497 N, at 0.9 MPa it is 7068 N, and the theoretical max is 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X120STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X120STC replacement — usually within 7-8 hours.