This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX140S, 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 SI100AX140S
The AirTAC SI100 Standard Cylinder SI100AX140S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 140mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX140S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX140S
- 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 SI100AX140S
The AirTAC SI100AX140S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 140mm stroke. Featuring a SUS420J2 stainless steel rod (-A) and a piston magnet (-S) for CS1-B/DS1-B switches, it delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100AX140S, matching the interface, bore, stroke, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For load holding, note that a plain cylinder drifts without live air; the cushion only decelerates, so consider the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100AX140S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX140S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX140S |
| Bore size | Ø100 mm |
| Stroke | 140 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 SAI100AX140S 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 SAI100AX140S 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 SI100AX140S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×140 | 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 SI100AX140S Is Used
Heavy Press Clamping
Ideal for securing heavy metal components during machining, using the 5497 N push force at 0.7 MPa to hold parts firmly in jigs.
Logistics Diverters
Powers heavy-duty sorting arms on high-throughput conveyor lines, utilizing the 30-800 mm/s speed range and adjustable end cushions.
Replacing the Airtac SI100 Standard Cylinder SI100AX140S with the SAI100AX140S
To replace the SI100AX140S, order the SAI100AX140S. Confirm the ISO 15552 mounting interface, the 100mm bore, the 140mm stroke, the G1/2 port, and your mounting accessory. The -A denotes a SUS420J2 stainless rod and -S indicates a magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). For sizing, neighboring bores are 80mm (2513 N push @0.5) and 125mm (6136 N push @0.5). Remember, a plain cylinder does not hold load on air loss; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. For any stroke >=300 mm, add external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX140S
- ✓ 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 SI100AX140S FAQ
Yes, the AirTAC SI100AX140S is discontinued. The direct replacement is the SAI100AX140S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 140mm stroke, G1/2 port, and mounting interface.
This 100mm bore cylinder has a G1/2 air port. The force ratings are: 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX140S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX140S replacement — usually within 7-8 hours.