This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X150S, 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 SI63 Standard Cylinder SI63X150S
The AirTAC Airtac SI63 Standard Cylinder SI63X150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X150S
- 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 SI63 Standard Cylinder SI63X150S
The AirTAC SI63X150S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 150mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X150S, sharing the same ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI-SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI accepts current AirTAC switches. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI63 Standard Cylinder SI63X150S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X150S |
| Bore size | Ø63 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63X150S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63X150S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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 SI63 Standard Cylinder SI63X150S Is Used
Clamping Fixtures
Holds workpieces securely during machining operations using its 1559 N push force at 0.5 MPa.
Package Diverting
Actuates routing gates on 63mm bore assembly lines, benefiting from the 30-800 mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63X150S with the SAI63X150S
To replace the SI63X150S, order the SAI63X150S and confirm the ISO 15552 mounting interface, G3/8 port thread (PT/G/NPT), and your specific mounting accessory (LB, FA, TC, etc.). The -S denotes a magnet for position sensing; the SAI replacement uses current AirTAC switches rather than the legacy CS1-B/DS1-B set. Sizing both ways: a 50mm bore yields 982 N push at 0.5 MPa, while an 80mm bore yields 2513 N. A plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for secure holding. At 150mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X150S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X150S FAQ
Yes, the AirTAC SI63X150S is discontinued. The direct replacement is the SAI63X150S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 150mm stroke, output force, G3/8 port, and mounting interface.
This 63mm bore double-acting cylinder features a G3/8 air port and an M16x1.5 rod thread. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X150S replacement — usually within 7-8 hours.