This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X50H, 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 SI100X50H
The AirTAC Airtac SI100 Standard Cylinder SI100X50H 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 SAI100X50H, 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 → SAI100X50H
- 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 SI100X50H
The AirTAC SI100X50H is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke. Built for high temperatures, the Viton H seal option extends operation to 0-150 C. This legacy unit delivers 3927 N push and 3681 N pull at 0.5 MPa through a G1/2 port.
AirTAC replaced this EOL model with the SAI100X50H, a direct sharing the exact ISO 15552 mounting interface, M20x1.5 rod thread, and force ratings. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Without a -S magnet, this SKU cannot take a sensor. For load holding, note the air cushion only decelerates; use an external rod lock or the SAIL/BSAI variants.
Airtac SI100 Standard Cylinder SI100X50H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X50H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X50H |
| 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 SAI100X50H 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 SAI100X50H 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 SI100X50H
| 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 SI100X50H Is Used
High-Temp Pressing
Applies 3927 N of push force at 0.5 MPa for seating components in heated molds, leveraging the Viton H seals rated for 150 C environments.
Heavy Clamping Jigs
Secures large workpieces with 3681 N pull force, utilizing the short 50mm stroke for rapid, high-force clamping cycles in machining fixtures.
Industrial Stamping
Drives short-stroke stamping and marking tools, safely handling a 2356 N working load while maintaining ISO 15552 fixture compatibility.
Replacing the Airtac SI100 Standard Cylinder SI100X50H with the SAI100X50H
To replace the SI100X50H, order the SAI100X50H. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the M20x1.5 rod thread. Because this SKU lacks a -S magnet, it cannot accept CS1-B/DS1-B sensors; if position detection is needed, switch to a magnet-equipped SAI. The 50mm stroke is well within the 1500mm max standard, keeping speed at 30-800 mm/s. If downsizing, an 80mm bore offers 2513 N push at 0.5 MPa. If you need to hold a load without live air, the plain cylinder will drift; select the SAIL lock or BSAI clamp-lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X50H
- ✓ 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 SI100X50H FAQ
Yes, the SI100X50H is discontinued. The direct replacement is the SAI100X50H. It shares the identical ISO 15552 mounting interface, 100mm bore, 50mm stroke, G1/2 port, and force output, fitting your existing fixtures perfectly.
This double-acting cylinder features a G1/2 port and an 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X50H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X50H replacement — usually within 7-8 hours.