This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X30, 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 SI50X30
The AirTAC Airtac SI50 Standard Cylinder SI50X30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 30mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X30
- 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 SI50X30
The AirTAC SI50X30 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 30mm stroke. Delivering 982N push force at 0.5MPa via a G1/4 port, it is directly replaced by the SAI50X30.
The SAI direct retains identical ISO 15552 mounting dimensions, bore, and force. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Since this specific SI50X30 SKU lacks a magnet (-S), it cannot accept position switches like the legacy CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X30 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X30 |
| Bore size | Ø50 mm |
| Stroke | 30 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 SAI50X30 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 SAI50X30 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 SI50X30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×30 | 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 SI50X30 Is Used
Short-Stroke Clamping
Ideal for holding parts during machining, using its 982N push force at 0.5MPa to secure workpieces firmly within a compact 30mm travel.
Package Diverting
Provides rapid actuation for sorting or diverting items on a production line, operating efficiently at speeds between 30-800 mm/s.
Replacing the Airtac SI50 Standard Cylinder SI50X30 with the SAI50X30
To replace the discontinued SI50X30, order the SAI50X30 direct, verifying the ISO 15552 interface, G1/4 port, M16x1.5 rod thread, and 30mm stroke. Because this SKU has no magnet, it cannot support sensors; add the -S suffix if switch tracking via current AirTAC switches is needed. For higher force, the 63mm bore offers 1559N push at 0.5MPa; for lighter duties, the 40mm bore gives 628N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X30
- ✓ 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 SI50X30 FAQ
Yes, the SI50X30 is discontinued. The direct replacement is the SAI50X30. It features the same ISO 15552 mounting interface, 50mm bore, 30mm stroke, output force, G1/4 port, and accessories, fitting directly into existing fixtures.
It features a G1/4 air port and provides 982N push / 825N pull at 0.5 MPa, 1374N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa. The SAI upgrade also uses two Y-shaped piston seals for lower start-up pressure.
Request a Quote for the SAI50X30
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X30 replacement — usually within 7-8 hours.