This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X400STC, 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 SI100X400STC
The AirTAC Airtac SI100 Standard Cylinder SI100X400STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X400STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X400STC
- 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 SI100X400STC
The AirTAC SI100X400STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 400mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa, utilizing a G1/2 port. The direct replacement is the SAI100X400STC, retaining the exact TC trunnion mount, M20x1.5 rod thread, and output force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants absent in the SI line. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X400STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X400STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X400STC |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAI100X400STC 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 SAI100X400STC 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 SI100X400STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SI100X400STC Is Used
Heavy-Duty Pressing
Applies 5497N of push force at 0.7MPa for seating bearings and assembling heavy mechanical components.
Pallet Diversion
Uses the 400mm stroke and TC trunnion mount to push heavy pallets onto parallel conveyor lines securely.
Replacing the Airtac SI100 Standard Cylinder SI100X400STC with the SAI100X400STC
To replace the SI100X400STC, order the SAI100X400STC. Confirm the ISO 15552 TC trunnion mounting interface, 100mm bore, 400mm stroke, G1/2 port, and the -S magnet for current AirTAC switches. Sizing both ways: a neighbouring 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. At 400mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts without live air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X400STC
- ✓ 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 SI100X400STC FAQ
Yes, the SI100X400STC is discontinued. The direct replacement is the SAI100X400STC. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 400mm stroke, G1/2 port, TC mount, and output force.
It features a G1/2 port and provides 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X400STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X400STC replacement — usually within 7-8 hours.