This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50LB, 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 SI100X50LB
The AirTAC Airtac SI100 Standard Cylinder SI100X50LB 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 SAI100X50LB, 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 → SAI100X50LB
- 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 SI100X50LB
The AirTAC SI100X50LB is a discontinued double-acting ISO 15552 profile cylinder with an LB foot mount. Built for heavy-duty tasks, it delivers 3927 N push force at 0.5 MPa through a 100 mm bore and G1/2 port. AirTAC replaced this legacy unit with the SAI100X50LB, a direct replacement sharing the exact interface, stroke, and output.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For this non-magnet SKU, position sensing is impossible. If high heat is expected, Viton H seals raise the ceiling to 150 C.
Airtac SI100 Standard Cylinder SI100X50LB Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50LB |
| 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 SAI100X50LB 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 SAI100X50LB 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 SI100X50LB
| 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 SI100X50LB Is Used
Heavy Stamping Press
Drives robust tooling with 3927 N of thrust at 0.5 MPa, absorbing end-of-stroke impact via 36 mm adjustable air cushions.
Pallet Lift Station
Lifts vertical loads up to 200 kg safely using the LB foot mount to secure the heavy-duty 100 mm profile barrel.
Bulk Material Divert
Actuates large lane changers on high-throughput lines, operating reliably at speeds between 30 and 800 mm/s.
Replacing the Airtac SI100 Standard Cylinder SI100X50LB with the SAI100X50LB
To replace the discontinued SI100X50LB, order the SAI100X50LB. Verify your ISO 15552 LB foot mount dimensions, 50 mm stroke, and G1/2 port. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order a magnet-equipped version if sensing is needed. The 100 mm bore yields 3927 N push at 0.5 MPa; sizing down, an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL lock and SAIF integrated valve variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50LB
- ✓ 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 SI100X50LB FAQ
Yes, the SI100X50LB is discontinued. The direct replacement is the SAI100X50LB. It shares the identical ISO 15552 mounting interface, 100 mm bore, 50 mm stroke, G1/2 port, and output force, fitting directly into existing LB foot mount fixtures.
This double-acting cylinder has a 25 mm rod, M20x1.5 thread, and a G1/2 port. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50LB replacement — usually within 7-8 hours.