This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X80CA, 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 SI50X80CA
The AirTAC Airtac SI50 Standard Cylinder SI50X80CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X80CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X80CA
- 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 SI50X80CA
The AirTAC SI50X80CA is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke. It delivers 982 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI50X80CA, which shares the exact CA clevis mounting interface and dimensions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. Note this SKU lacks a magnet, so it cannot take CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X80CA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X80CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X80CA |
| Bore size | Ø50 mm |
| Stroke | 80 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 SAI50X80CA 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 SAI50X80CA 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 SI50X80CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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 SI50X80CA Is Used
Clamp Actuation
Provides reliable 982 N clamping force for mid-sized machining fixtures, utilizing the 80 mm stroke to secure workpieces during milling operations.
Package Diversion
Drives short-stroke routing gates on packaging lines, where the 50 mm bore offers sufficient push force to deflect cartons at high speeds.
Pallet Stopper
Acts as a pneumatic stop mechanism in material handling zones, using the CA clevis mount to absorb repeated impact loads safely.
Replacing the Airtac SI50 Standard Cylinder SI50X80CA with the SAI50X80CA
To replace the SI50X80CA, order the SAI50X80CA. Verify the ISO 15552 CA clevis mount, 50 mm bore, 80 mm stroke, G1/4 port (PT/G/NPT) and M16x1.5 rod thread. Since this SKU has no -S magnet, it cannot accept position sensors; add the S suffix if sensing is needed. For sizing, the 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore yields 1559 N. A plain cylinder drifts on air loss; for load holding use the SAIL lock or BSAI clamp-lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X80CA
- ✓ 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 SI50X80CA FAQ
Yes, the SI50X80CA is discontinued. The direct replacement is the AirTAC SAI50X80CA. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 80 mm stroke, CA clevis mount, G1/4 port and output force.
The G1/4 port feeds a cylinder that pushes 982 N and pulls 825 N at 0.5 MPa. At 0.7 MPa push is 1374 N, and the theoretical maximum force is 200 kgf at 1.0 MPa. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X80CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X80CA replacement — usually within 7-8 hours.