This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X155STC, 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 SI100X155STC
The AirTAC Airtac SI100 Standard Cylinder SI100X155STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X155STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X155STC
- 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 SI100X155STC
The AirTAC SI100X155STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 155mm stroke. Delivering 3927N push force at 0.5MPa through a G1/2 port, it is replaced by the SAI100X155STC. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force, port and TC trunnion mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For load holding, note the cushion only decelerates; use the SAIL lock or BSAI clamp-lock variants. The -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X155STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X155STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X155STC |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAI100X155STC 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 SAI100X155STC 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 SI100X155STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SI100X155STC Is Used
Heavy Press Clamping
Applies the 3927N push force at 0.5MPa to secure heavy metal castings during machining operations.
Pallet Diverting
Uses the 155mm stroke and TC trunnion mount to push loaded pallets smoothly across transfer lines.
Material Lift Gates
Raises and lowers loading dock gates, safely moving loads near the 200kg vertical lift threshold.
Replacing the Airtac SI100 Standard Cylinder SI100X155STC with the SAI100X155STC
To replace the SI100X155STC, order the SAI100X155STC. Verify the ISO 15552 TC trunnion interface, 155mm stroke, G1/2 port, and -S magnet for CS1-B/DS1-B switches. Sizing both ways: at 0.5MPa it yields 3927N push / 3681N pull, while the 80mm bore offers 2513N push. If you need to hold a load without live air, the cushion only decelerates; you must add an external rod lock, a pilot check valve, or switch to the SAIL/BSAI lock variant. The SAI family also adds the SAIF self-valve option (bores 32-100).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X155STC
- ✓ 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 SI100X155STC FAQ
Yes, the SI100X155STC is discontinued. The direct replacement is the SAI100X155STC, which shares the identical ISO 15552 mounting interface, 100mm bore, 155mm stroke, output force, G1/2 port and TC trunnion mount.
It features a G1/2 port and provides 3927N push / 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X155STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X155STC replacement — usually within 7-8 hours.