This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X60S, 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 SI50X60S
The AirTAC Airtac SI50 Standard Cylinder SI50X60S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 60mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X60S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke60 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X60S
- 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 SI50X60S
The AirTAC SI50X60S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 60mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X60S, a direct upgrade retaining the exact interface, bore, stroke, force, and mounting.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This SI50X60S includes a magnet for CS1-B/DS1-B switches.
Airtac SI50 Standard Cylinder SI50X60S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X60S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X60S |
| Bore size | Ø50 mm |
| Stroke | 60 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 SAI50X60S 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 SAI50X60S 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 SI50X60S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×60 | 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 SI50X60S Is Used
Clamp Actuation
Drives mid-force clamping arms on machining fixtures, utilizing the 60mm stroke to secure parts for milling or drilling operations.
Package Diversion
Powers short-stroke routing gates on packaging lines, providing reliable 982N push force to redirect cartons at transfer points.
Replacing the Airtac SI50 Standard Cylinder SI50X60S with the SAI50X60S
To replace the SI50X60S, order the SAI50X60S direct. Confirm the ISO 15552 mounting interface, 50mm bore, 60mm stroke, G1/4 port (PT/G/NPT), and mounting accessory. Because this unit has the -S magnet, it supports legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. If you need more force, the 63mm bore yields 1559N push at 0.5MPa; if less is required, the 40mm bore provides 628N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X60S
- ✓ 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 SI50X60S FAQ
Yes, the SI50X60S is discontinued. The direct replacement is the AirTAC SAI50X60S. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 60mm stroke, G1/4 port, and mounting interface, so it fits existing fixtures directly.
The bore is 50mm with 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.
Request a Quote for the SAI50X60S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X60S replacement — usually within 7-8 hours.