This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X115STC, 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 SI100X115STC
The AirTAC Airtac SI100 Standard Cylinder SI100X115STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 115mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X115STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X115STC
- 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 SI100X115STC
The AirTAC SI100X115STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 115mm stroke. It delivers 3927N push force at 0.5MPa and features a G1/2 port. The direct replacement is the SAI100X115STC, retaining the exact TC trunnion mounting interface, M20x1.5 rod thread, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants. This -S SKU uses CS1-B/DS1-B sensors, while SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X115STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X115STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X115STC |
| Bore size | Ø100 mm |
| Stroke | 115 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 SAI100X115STC 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 SAI100X115STC 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 SI100X115STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×115 | 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 SI100X115STC Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927N push force to maintain rigid clamping under heavy cutting loads.
Automated Gate Control
Actuates large loading dock gates, where the adjustable 36mm air cushions decelerate the 25mm rod smoothly at stroke ends to prevent impact damage.
Replacing the Airtac SI100 Standard Cylinder SI100X115STC with the SAI100X115STC
To replace the SI100X115STC, order the SAI100X115STC. Verify the ISO 15552 TC trunnion mount, 115mm stroke, G1/2 port, and the -S magnet for sensing. If you need more force, the 125mm bore offers 6136N push at 0.5MPa; if less is required, the 80mm bore provides 2513N. Note that a standard cylinder drifts without live air, so for load holding consider the SAIL or BSAI lock variants, or an external pilot check valve. At 115mm stroke, side-load is minimal, but always ensure proper guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X115STC
- ✓ 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 SI100X115STC FAQ
Yes, the SI100X115STC is discontinued. The direct replacement is the SAI100X115STC. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 115mm stroke, G1/2 port, TC mount, and force.
The 100mm bore features a G1/2 port. It delivers 3927N push and 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 SAI100X115STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X115STC replacement — usually within 7-8 hours.