This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X150S, 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 SI100X150S
The AirTAC Airtac SI100 Standard Cylinder SI100X150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X150S
- 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 SI100X150S
The AirTAC SI100X150S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 150mm stroke. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100X150S. This direct upgrade shares identical ISO 15552 mounting dimensions, bore, stroke, force, and accessories. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
The original SI -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI replacement family uses current AirTAC switches. Standard cylinders cannot hold loads without live air; the cushion only decelerates. For secure holding, the SAI family introduces lock variants the SI lacked, such as the SAIL (air-released lock) and BSAI (clamp-lock). You can also choose Viton H seals for high-temperature environments up to 150 C.
Airtac SI100 Standard Cylinder SI100X150S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X150S |
| Bore size | Ø100 mm |
| Stroke | 150 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 SAI100X150S 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 SAI100X150S 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 SI100X150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×150 | 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 SI100X150S Is Used
Heavy-Duty Pressing
Applies up to 5497 N of push force at 0.7 MPa for seating bearings, stamping light-gauge sheet metal, or clinching components in automated assembly lines.
Pallet Handling
Drives robust lifting forks or heavy-duty pushers on conveyor belts, utilizing the 150mm stroke to index loaded pallets efficiently.
Clamping Fixtures
Secures large workpieces or thick metal plates during machining and welding operations, maintaining firm grip with 3681 N pull force at 0.5 MPa.
Replacing the Airtac SI100 Standard Cylinder SI100X150S with the SAI100X150S
To replace the discontinued SI100X150S, order the SAI100X150S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 150mm stroke, and the G1/2 port (PT/G/NPT). The -S suffix confirms the magnet for position sensing. When sizing, the 100mm bore yields 3927 N push at 0.5 MPa; if less force is needed, an 80mm bore provides 2513 N. If more force is required, a 125mm bore offers 6136 N. Because this is a double-acting cylinder, it will drift if air pressure is lost. For load-holding, consider the SAIL or BSAI lock variants, or use an external pilot check valve. The 150mm stroke is below the 300mm threshold, so rod-bending side-load risks are minimal, but always ensure smooth linear guidance.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X150S
- ✓ 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 SI100X150S FAQ
Yes, the SI100X150S is discontinued. The direct replacement is the AirTAC SAI100X150S. It shares the same ISO 15552 mounting interface, 100mm bore, 150mm stroke, output force, G1/2 port, and accessories, fitting directly into existing fixtures.
The bore is 100mm with a G1/2 air port and an M20x1.5 rod thread. Theoretical forces 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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X150S replacement — usually within 7-8 hours.