This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X25, 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 SI100X25
The AirTAC Airtac SI100 Standard Cylinder SI100X25 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X25, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X25
- 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 SI100X25
The AirTAC SI100X25 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 25 mm stroke. Delivering 3927 N push force at 0.5 MPa through a G1/2 port, it is replaced by the SAI100X25. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force, port and mounting accessories, dropping straight into existing fixtures.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note that this specific SI SKU lacks a magnet (-S) and cannot accept a position sensor; the legacy series used CS1-B/DS1-B switches. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent from the original SI line.
Airtac SI100 Standard Cylinder SI100X25 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X25 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X25 |
| Bore size | Ø100 mm |
| Stroke | 25 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 SAI100X25 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 SAI100X25 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 SI100X25
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SI100X25 Is Used
High-Force Clamping
Secures heavy metal castings in machining fixtures using 3927 N of thrust at 0.5 MPa without shifting during milling.
Short-Stroke Pressing
Performs compact 25 mm pressing operations for bearing insertion or light assembly tasks requiring high peak force.
Pallet Diverter
Actuates heavy-duty diverting gates on packaging lines, moving substantial loads quickly with a 30-800 mm/s speed range.
Replacing the Airtac SI100 Standard Cylinder SI100X25 with the SAI100X25
To replace the discontinued SI100X25, order the SAI100X25. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G1/2 port thread (PT, G or NPT), and the M20x1.5 rod-end thread. Because this SKU has no magnet, it cannot support sensing; if position detection is needed, specify an SAI100X25S and use current AirTAC switches. Sizing both ways: the 100 mm bore yields 3927 N push at 0.5 MPa, while the neighbouring 80 mm bore provides 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The 25 mm stroke is well within the 1500 mm standard limit and short enough to avoid rod-bending side-load concerns.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X25
- ✓ 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 SI100X25 FAQ
Yes, the SI100X25 is discontinued. The direct replacement is the SAI100X25. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 25 mm stroke, output force, G1/2 port and mounting interface to fit existing fixtures directly.
The 100 mm bore features a G1/2 air port and provides 3927 N push / 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a maximum theoretical force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X25
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X25 replacement — usually within 7-8 hours.