This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50SN, 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 SI100X50SN
The AirTAC Airtac SI100 Standard Cylinder SI100X50SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X50SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X50SN
- 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 SI100X50SN
The AirTAC SI100X50SN is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 50 mm stroke, delivering a push force of 3927 N at 0.5 MPa. It features an extruded aluminum barrel, a G1/2 port, and an NBR seal (-N) operating between -20 and +70 C. Because this legacy unit is end-of-life, you should order the direct replacement: SAI100X50SN.
The SAI100X50SN maintains the same ISO 15552 mounting interface, output force, and port size, fitting existing fixtures perfectly. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The built-in magnet (-S) supports CS1-B/DS1-B sensors, while the SAI family also introduces SAIL and BSAI lock variants absent from the SI line.
Airtac SI100 Standard Cylinder SI100X50SN Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50SN |
| Bore size | Ø100 mm |
| Stroke | 50 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 SAI100X50SN 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 SAI100X50SN 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 SI100X50SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SI100X50SN Is Used
Heavy Press Clamping
Ideal for holding heavy metal components during machining, utilizing the 3927 N push force at 0.5 MPa to secure parts firmly against the fixture.
Pallet Positioning Stops
Functions as a robust stopper in high-capacity conveyor lines, absorbing kinetic energy from pallets via its 36 mm adjustable air cushions at both ends.
Material Lift Gates
Drives heavy lifting gates in automated storage systems, where the 100 mm bore provides the necessary thrust to move loads vertically under continuous cycling.
Replacing the Airtac SI100 Standard Cylinder SI100X50SN with the SAI100X50SN
To replace the SI100X50SN, order the SAI100X50SN, verifying the ISO 15552 mounting interface, 100 mm bore, 50 mm stroke, G1/2 port, and NBR seal. The -S magnet enables CS1-B/DS1-B switches, which carry over to current AirTAC sensors on the SAI. If you need to scale up or down, neighboring bores like 80 mm or 125 mm alter the 0.5 MPa push force (2513 N or 6136 N respectively). Note that a standard cylinder drifts without live air, as the adjustable 36 mm cushions only decelerate the load; for secure holding, use an external pilot check valve or explore the SAIL and BSAI lock variants. The SAIF variant with a built-in 4M valve is also available for bores up to 100 mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50SN
- ✓ 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 SI100X50SN FAQ
Yes, the SI100X50SN is discontinued. The direct replacement is the SAI100X50SN. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 50 mm stroke, G1/2 port, and mounting accessories.
The bore is 100 mm with a G1/2 air port. The thrust 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 force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50SN replacement — usually within 7-8 hours.