This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X205S, 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 SI63X205S
The AirTAC Airtac SI63 Standard Cylinder SI63X205S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 205mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X205S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke205 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X205S
- 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 SI63X205S
The AirTAC SI63X205S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 205mm stroke. Delivering 1559N push force at 0.5MPa through a G3/8 port, it is replaced by the SAI63X205S. This direct successor matches the exact interface, bore, stroke, force and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also adds SAIL, SAIF and BSAI variants the SI lacked. The -S magnet works with CS1-B/DS1-B sensors, while a plain cylinder needs a pilot check valve for load holding.
Airtac SI63 Standard Cylinder SI63X205S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X205S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X205S |
| Bore size | Ø63 mm |
| Stroke | 205 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 SAI63X205S 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 SAI63X205S 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 SI63X205S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×205 | 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 SI63X205S Is Used
Clamp Actuation
Provides reliable 1559N clamping force for mid-weight machining fixtures.
Package Diverting
Drives 205mm diverting arms to route medium-density goods on sorting lines.
Pallet Stopping
Acts as a robust stopper for pallets up to 79kg in vertical lift scenarios.
Replacing the Airtac SI63 Standard Cylinder SI63X205S with the SAI63X205S
To replace the SI63X205S, order the SAI63X205S direct. Verify the ISO 15552 mounting interface, 205mm stroke, G3/8 port and M16x1.5 rod thread. Keep the -S magnet for CS1-B/DS1-B sensors. Sizing both ways: a 50mm bore yields 982N push, while an 80mm bore yields 2513N at 0.5MPa. For 205mm strokes, ensure guide alignment to prevent rod bending. A plain cylinder drifts on air loss; for load holding use the SAIL lock or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X205S
- ✓ 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 SI63X205S FAQ
Yes, the SI63X205S is discontinued. The direct replacement is the SAI63X205S, which shares the same ISO 15552 mounting interface, 63mm bore, 205mm stroke, G3/8 port and output force.
It features a G3/8 port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X205S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X205S replacement — usually within 7-8 hours.