This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X80SCB, 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 SI50X80SCB
The AirTAC Airtac SI50 Standard Cylinder SI50X80SCB 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 SAI50X80SCB, 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 → SAI50X80SCB
- 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 SI50X80SCB
The AirTAC SI50X80SCB is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke, delivering a push force of 982 N at 0.5 MPa. It features a CB clevis mount, a G1/4 port, and a built-in piston magnet for legacy CS1-B/DS1-B switches. AirTAC replaced this EOL unit with the SAI50X80SCB, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, force, port, and CB accessory.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds the SAIL air-released lock, SAIF built-in valve, and BSAI clamp-lock variants the original SI lacked.
Airtac SI50 Standard Cylinder SI50X80SCB Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X80SCB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X80SCB |
| 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 SAI50X80SCB 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 SAI50X80SCB 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 SI50X80SCB
| 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 SI50X80SCB Is Used
Package Diversion
Actuates a 50 kg routing gate on a packaging line, utilizing the 80 mm stroke to push parcels cleanly without overextending into the lane.
Clamp Actuation
Provides 982 N of push force at 0.5 MPa to secure medium-sized aluminum housings during CNC machining operations.
Pallet Stopper
Uses the CB clevis mount to pivot a stopping jaw on a roller conveyor, safely arresting pallet movement in staging zones.
Replacing the Airtac SI50 Standard Cylinder SI50X80SCB with the SAI50X80SCB
To replace the SI50X80SCB, order the SAI50X80SCB and verify your ISO 15552 CB clevis mounting interface, 50 mm bore, 80 mm stroke, and G1/4 port (available in PT, G, or NPT). Keep the -S magnet specification so you can use current AirTAC switches instead of the legacy CS1-B/DS1-B sensors. If you need to resize, neighboring bores are 40 mm and 63 mm; at 0.5 MPa this 50 mm bore yields 982 N push and 825 N pull. Remember that a standard cylinder drifts without live air, as the 30 mm adjustable cushions only decelerate near stroke end. For load holding on air loss, specify an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X80SCB
- ✓ 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 SI50X80SCB FAQ
Yes, the AirTAC SI50X80SCB is discontinued. The direct replacement is the SAI50X80SCB. It shares the identical ISO 15552 mounting interface, 50 mm bore, 80 mm stroke, 982 N output force, G1/4 port, and CB clevis mount, fitting directly into existing fixtures.
This double-acting cylinder uses a G1/4 air port. The thrust ratings are 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X80SCB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X80SCB replacement — usually within 7-8 hours.