This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X355, 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 SI100X355
The AirTAC Airtac SI100 Standard Cylinder SI100X355 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 355mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X355, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke355 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X355
- 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 SI100X355
The AirTAC SI100X355 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 355mm stroke, delivering 3927N push force at 0.5MPa. AirTAC replaced it with the SAI100X355. This direct upgrade maintains the exact ISO 15552 mounting interface, 355mm stroke, output force, and G1/2 port size, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Because this specific SKU lacks the -S magnet option, it cannot accept a sensor. The SAI family also introduces SAIL lock, SAIF valve, and BSAI clamp variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X355 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X355 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X355 |
| Bore size | Ø100 mm |
| Stroke | 355 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 SAI100X355 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 SAI100X355 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 SI100X355
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×355 | 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 SI100X355 Is Used
Heavy Material Handling
Drives robust pallet transfers and heavy workpiece positioning on automated assembly lines requiring substantial push force over a 355mm travel distance.
Large Press Demolding
Ejects large molded components from heavy industrial presses, utilizing the 100mm bore's 3927N push force at 0.5MPa to overcome part resistance.
Replacing the Airtac SI100 Standard Cylinder SI100X355 with the SAI100X355
To replace the SI100X355, order the SAI100X355 and verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), 355mm stroke, and G1/2 port (PT/G/NPT). When sizing, consider neighboring bores: an 80mm yields 2513N push at 0.5MPa, while a 125mm provides 6136N. This plain, non-magnetic cylinder cannot hold a load without live air; the cushion only decelerates. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variant. Because 355mm exceeds 300mm, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X355
- ✓ 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 SI100X355 FAQ
Yes, the SI100X355 is discontinued. The direct replacement is the AirTAC SAI100X355. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 355mm stroke, G1/2 port, and mounting interface.
The G1/2 port bore 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. The rod is 25mm with an M20x1.5 thread and 36mm cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X355
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X355 replacement — usually within 7-8 hours.