This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X40S, 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 SI100X40S
The AirTAC Airtac SI100 Standard Cylinder SI100X40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X40S
- 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 SI100X40S
The AirTAC SI100X40S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 40mm stroke, delivering 3927 N of push force at 0.5 MPa. The direct replacement is the SAI100X40S, which preserves the original G1/2 port, M20x1.5 rod thread, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, and the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100X40S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X40S |
| Bore size | Ø100 mm |
| Stroke | 40 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 SAI100X40S 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 SAI100X40S 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 SI100X40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SI100X40S Is Used
Heavy-Duty Pressing
Ideal for applying high clamping or pressing forces in automated assembly lines, utilizing the 100mm bore's 3927 N push at 0.5 MPa to seat bearings or form components.
Pallet Diverting
Provides robust actuation for heavy pallet stops and diverters in material handling systems, where the short 40mm stroke delivers rapid, high-impact positioning.
Replacing the Airtac SI100 Standard Cylinder SI100X40S with the SAI100X40S
To replace the SI100X40S, order the SAI100X40S and confirm the ISO 15552 mounting interface, 100mm bore, 40mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. The -S magnet equates to legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. If you need more force, the 125mm bore offers 6136 N push at 0.5 MPa; if less is acceptable, the 80mm bore provides 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. With a 40mm stroke, side-load risks are minimal, but ensure straight alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X40S
- ✓ 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 SI100X40S FAQ
Yes, the SI100X40S is discontinued. The direct replacement is the AirTAC SAI100X40S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 40mm stroke, output force, G1/2 port, and mounting fixtures.
The 100mm bore features a G1/2 air port and M20x1.5 rod thread. It delivers 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 max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X40S replacement — usually within 7-8 hours.