This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X538S, 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 SI63X538S
The AirTAC Airtac SI63 Standard Cylinder SI63X538S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 538mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X538S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke538 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X538S
- 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 SI63X538S
The AirTAC SI63X538S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 538 mm stroke. Delivering 1559 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI63X538S. This direct upgrade shares identical ISO 15552 mounting dimensions, bore, stroke, and output force.
The SAI 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 lock, SAIF valve, and BSAI clamp-lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X538S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X538S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X538S |
| Bore size | Ø63 mm |
| Stroke | 538 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 SAI63X538S 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 SAI63X538S 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 SI63X538S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×538 | 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 SI63X538S Is Used
Pallet Diversion
Pushes heavy pallets sideways off a main conveyor line, utilizing the 1559 N push force to overcome friction over the 538 mm travel.
Material Lowering
Acts as a gravity counterbalance lowering bulky fixtures, requiring external guides due to the 538 mm stroke to prevent rod bending.
Replacing the Airtac SI63 Standard Cylinder SI63X538S with the SAI63X538S
To replace the SI63X538S, order the SAI63X538S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the -S magnet for position sensing. Sizing checks: a 50 mm bore yields 982 N [email protected] MPa, while an 80 mm bore yields 2513 N. Because stroke is 538 mm, prevent rod bending by guiding the load externally to avoid side loads. A plain cylinder drifts without air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X538S
- ✓ 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 SI63X538S FAQ
Yes, the SI63X538S is discontinued. The direct replacement is the SAI63X538S. It shares the same ISO 15552 mounting interface, 63 mm bore, 538 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This 63 mm bore double-acting cylinder has a G3/8 air port. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N at 0.9 MPa, and a maximum theoretical force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X538S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X538S replacement — usually within 7-8 hours.