This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X253SN, 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 SI100X253SN
The AirTAC Airtac SI100 Standard Cylinder SI100X253SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 253mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X253SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke253 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X253SN
- 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 SI100X253SN
The AirTAC SI100X253SN is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 253mm stroke. It delivers 3927N push force at 0.5MPa through a G1/2 port. The direct replacement is the SAI100X253SN, matching the interface, stroke and force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The NBR seal handles -20 to +70C, while Viton H extends to 150C. Your -S magnet works with CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X253SN Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X253SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X253SN |
| Bore size | Ø100 mm |
| Stroke | 253 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 SAI100X253SN 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 SAI100X253SN 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 SI100X253SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×253 | 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 SI100X253SN Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927N push force to hold components rigidly against the cutting tool.
Bulk Material Diversion
Actuates heavy-duty diverter arms on high-throughput packaging lines, pushing dense cartons onto secondary routing belts.
Replacing the Airtac SI100 Standard Cylinder SI100X253SN with the SAI100X253SN
To replace the SI100X253SN, order the SAI100X253SN direct. Verify the ISO 15552 mounting interface, 253mm stroke, G1/2 port, and M20x1.5 rod thread. The -S magnet enables CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). At 253mm stroke, use guide rails to prevent rod bending and side loads. Neighbouring bores: an 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. Note that a plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X253SN
- ✓ 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 SI100X253SN FAQ
Yes, the SI100X253SN is discontinued. The direct replacement is the SAI100X253SN. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 253mm stroke, G1/2 port, and mounting fixtures.
The G1/2 port feeds the 25mm rod. Force ratings are: 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. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X253SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X253SN replacement — usually within 7-8 hours.