This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX145S, 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 SI100AX145S
The AirTAC SI100 Standard Cylinder SI100AX145S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 145mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX145S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX145S
- 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 SI100AX145S
The AirTAC SI100AX145S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 145mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100AX145S, matching the interface, force, and mounting. This unit features a SUS420J2 stainless rod and a piston magnet for CS1-B/DS1-B sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants. Note that standard cylinders drift without live air; use a pilot check valve for load holding.
Airtac SI100 Standard Cylinder SI100AX145S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX145S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX145S |
| Bore size | Ø100 mm |
| Stroke | 145 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 SAI100AX145S 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 SAI100AX145S 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 SI100AX145S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×145 | 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 SI100AX145S Is Used
Heavy-Duty Pressing
Ideal for applying high clamping forces in automated assembly lines, utilizing the 3927 N push at 0.5 MPa to seat bearings or form components securely.
Large Fixture Actuation
Drives substantial machining fixtures or heavy industrial doors, benefiting from the 100mm bore capacity and the corrosion-resistant SUS420J2 rod option.
Replacing the Airtac SI100 Standard Cylinder SI100AX145S with the SAI100AX145S
To replace the SI100AX145S, order the SAI100AX145S. Confirm the ISO 15552 mounting interface, 100mm bore, 145mm stroke, G1/2 port, and the -S magnet for current AirTAC switches. The -A code specifies a SUS420J2 stainless rod, replacing the standard carbon steel. If you need to size both ways, neighbouring bores are 80mm and 125mm; at 0.5 MPa, this 100mm bore yields 3927 N push. Because the stroke is under 300mm, rod bending is minimal, but always guide external loads. A plain cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, specify the SAIL or BSAI lock variant, or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX145S
- ✓ 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 SI100AX145S FAQ
Yes, the SI100AX145S is discontinued. The direct replacement is the SAI100AX145S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 145mm stroke, G1/2 port, and mounting interface. The SAI features an upgraded piston seal for longer life.
This double-acting cylinder uses a G1/2 port. The force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX145S
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