This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X583, 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 SI50X583
The AirTAC Airtac SI50 Standard Cylinder SI50X583 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 583mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X583, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke583 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X583
- 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 SI50X583
The AirTAC SI50X583 is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 583 mm stroke. It delivers 982 N push force at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI50X583, a direct sharing the exact interface, bore, stroke, force and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It adds SAIL, SAIF and BSAI variants the SI lacked. With no -S suffix, this SKU cannot take a sensor.
Airtac SI50 Standard Cylinder SI50X583 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X583 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X583 |
| Bore size | Ø50 mm |
| Stroke | 583 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 SAI50X583 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 SAI50X583 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 SI50X583
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×583 | 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 SI50X583 Is Used
Long-Stroke Diversion
Pushes packages across transfer lines with a 583 mm reach, utilizing the 982 N thrust at 0.5 MPa for reliable routing.
Press Ejection
Ejects formed parts from press beds, using adjustable 30 mm air cushions to decelerate the payload at stroke end.
Replacing the Airtac SI50 Standard Cylinder SI50X583 with the SAI50X583
To replace the SI50X583, order the SAI50X583. Confirm the ISO 15552 mounting interface, G1/4 port, M16x1.5 rod thread and 583 mm stroke. Neighbouring bores are 40 mm (628 N push @0.5) and 63 mm (1559 N push @0.5). This plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The 583 mm stroke demands external guides to prevent rod bending under side loads. Without a -S suffix, it cannot accept CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X583
- ✓ 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 SI50X583 FAQ
Yes, the SI50X583 is discontinued. The direct replacement is the SAI50X583, which matches the 50 mm bore, 583 mm stroke, 982 N force, G1/4 port and ISO 15552 mounting interface.
The 50 mm bore uses a G1/4 port. Force output is 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50X583
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X583 replacement — usually within 7-8 hours.