This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1100, 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 SI50 Standard Cylinder SI50X1100
The AirTAC Airtac SI50 Standard Cylinder SI50X1100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1100
- 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 SI50 Standard Cylinder SI50X1100
The AirTAC SI50X1100 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1100mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X1100, matching the interface, force, and mounting exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor. For load holding, use the SAIL lock variant or an external pilot check valve, as cushions only decelerate.
Airtac SI50 Standard Cylinder SI50X1100 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1100 |
| Bore size | Ø50 mm |
| Stroke | 1100 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X1100 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X1100 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X1100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1100 | 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 SI50 Standard Cylinder SI50X1100 Is Used
Long-Stroke Vertical Lift
Raises and lowers 50 kg platforms through a 1100mm travel using 982N thrust at 0.5MPa, guided externally to prevent rod bending.
Material Diversion Gate
Actuates large routing flaps over wide conveyor belts, utilizing the 30mm adjustable air cushions to decelerate the 1100mm stroke smoothly.
High-Bay Storage Pusher
Pushes totes into deep storage racks, requiring the G1/4 ported 50mm bore to cycle reliably within the 30-800mm/s speed range.
Replacing the Airtac SI50 Standard Cylinder SI50X1100 with the SAI50X1100
To replace the SI50X1100, order the SAI50X1100. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC), the 50mm bore, 1100mm stroke, and G1/4 port. This non-magnet SKU cannot accept CS1-B/DS1-B switches. Sizing both ways: a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore yields 1559N. Note that a 1100mm stroke demands external guides to prevent rod bending and side-load wear. For load holding without live air, select the SAIL or BSAI lock variant, or add an external rod lock. The SAI family also offers SAIF valve variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1100
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X1100 FAQ
Yes, the AirTAC SI50X1100 is discontinued. The direct replacement is the SAI50X1100. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 1100mm stroke, output force, G1/4 port, and mounting accessories.
The G1/4 port feeds a 50mm bore yielding 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a 200 kgf max at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1100
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1100 replacement — usually within 7-8 hours.