This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X250, 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 SI100X250
The AirTAC Airtac SI100 Standard Cylinder SI100X250 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X250, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X250
- 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 SI100X250
The AirTAC SI100X250 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 250mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa, operating via a G1/2 port with a 25mm rod. AirTAC replaced this legacy unit with the SAI100X250 direct replacement, retaining the exact ISO 15552 mounting interface, force, and dimensions.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X250 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X250 |
| Bore size | Ø100 mm |
| Stroke | 250 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 SAI100X250 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 SAI100X250 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 SI100X250
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SI100X250 Is Used
Heavy-Duty Pressing
Applies 5497N of thrust at 0.7MPa for seating bearings and assembling heavy mechanical components.
Pallet Diversion
Drives robust routing gates or stops on high-mass material handling lines with a 200kg safe lift margin.
Lift Gate Actuation
Raises and lowers loaded staging platforms, relying on external check valves to hold loads safely.
Replacing the Airtac SI100 Standard Cylinder SI100X250 with the SAI100X250
To replace the SI100X250, order the SAI100X250. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the 250mm stroke. Sizing both ways: a neighboring 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. This 100mm unit provides 5497N at 0.7MPa. Because the stroke is 250mm, ensure guide alignment to prevent rod bending. This non-magnet SKU cannot take switches; order an SAI100X250S if sensing is needed. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X250
- ✓ 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 SI100X250 FAQ
Yes, the SI100X250 is discontinued. The direct replacement is the SAI100X250, which matches the ISO 15552 mounting interface, 100mm bore, 250mm stroke, 3927N force, and G1/2 port.
It uses a G1/2 port. Force output is 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X250
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X250 replacement — usually within 7-8 hours.