This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X110, 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 SI50X110
The AirTAC Airtac SI50 Standard Cylinder SI50X110 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 110mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X110, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke110 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X110
- 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 SI50X110
The AirTAC SI50X110 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 110mm stroke, delivering 982N push force at 0.5MPa via a G1/4 port. As an end-of-life product, it is replaced by the SAI50X110 direct, which maintains identical interface dimensions, output force, and mounting fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and longevity. Note this non-magnetic SKU cannot accept a sensor; legacy -S versions used CS1-B/DS1-B switches. For high heat, Viton H seals raise the limit to 150C.
Airtac SI50 Standard Cylinder SI50X110 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X110 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X110 |
| Bore size | Ø50 mm |
| Stroke | 110 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 SAI50X110 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 SAI50X110 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 SI50X110
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×110 | 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 SI50X110 Is Used
Package Diversion
Ideal for pushing medium-weight cartons off a main conveyor line, utilizing the 110mm stroke to clear the belt path efficiently.
Clamp Actuation
Provides reliable clamping force for holding aluminum extrusions or light steel parts in place during drilling and milling operations.
Pallet Stop Gate
Acts as a pneumatic stop gate for pallets entering a wrapping station, absorbing impact using the adjustable 30mm end cushions.
Replacing the Airtac SI50 Standard Cylinder SI50X110 with the SAI50X110
To replace the SI50X110, order the SAI50X110 and verify your ISO 15552 mounting interface, 110mm stroke, G1/4 port (PT/G/NPT), and accessory type (LB, FA, TC, etc.). This non-magnetic version cannot host a sensor, so if position detection is needed, specify an SAI50X110S and use current AirTAC switches. Sizing both ways: the 50mm bore yields 982N push at 0.5MPa; if less force is acceptable, a 40mm bore offers 628N, while a 63mm bore provides 1559N. Remember a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X110
- ✓ 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 SI50X110 FAQ
Yes, the SI50X110 is discontinued. The direct replacement is the SAI50X110, a current-production ISO 15552 cylinder. It shares the exact same 50mm bore, 110mm stroke, G1/4 port, and mounting dimensions, fitting directly into your existing fixtures.
The 50mm bore uses a G1/4 air port. At 0.5MPa it provides 982N push and 825N pull force. At 0.7MPa push is 1374N, and at 0.9MPa it is 1767N. The theoretical maximum force is 200kgf at 1.0MPa, with an operating speed range of 30-800mm/s.
Request a Quote for the SAI50X110
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X110 replacement — usually within 7-8 hours.