This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X227S, 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 SI63X227S
The AirTAC Airtac SI63 Standard Cylinder SI63X227S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 227mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X227S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke227 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X227S
- 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 SI63X227S
The AirTAC SI63X227S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 227 mm stroke. It delivers a push force of 1559 N at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X227S, a direct upgrade sharing the exact same ISO 15552 mounting interface, bore, stroke, output force, port size and accessories.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces SAIL, SAIF and BSAI lock or valve variants the original SI lacked.
Airtac SI63 Standard Cylinder SI63X227S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X227S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X227S |
| Bore size | Ø63 mm |
| Stroke | 227 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 SAI63X227S 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 SAI63X227S 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 SI63X227S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×227 | 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 SI63X227S Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 1559 N push force to reliably shift heavy cartons at high cycling speeds.
Clamp Actuation
Secures heavy workpieces in machining fixtures, providing stable holding against vibration during milling or drilling operations.
Replacing the Airtac SI63 Standard Cylinder SI63X227S with the SAI63X227S
To replace the discontinued SI63X227S, order the SAI63X227S. Confirm the ISO 15552 mounting interface, the 63 mm bore, the 227 mm stroke, the G3/8 port, and your mounting accessory (LB, FA, CA, TC, etc.). The -S magnet is present for position sensing. When sizing, consider neighboring bores: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore provides 2513 N. Note that a plain ISO 15552 cylinder does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. Because the stroke is over 200 mm, ensure adequate guide support to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X227S
- ✓ 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 SI63X227S FAQ
Yes, the SI63X227S is discontinued. The direct replacement is the AirTAC SAI63X227S. It shares the identical ISO 15552 mounting interface, 63 mm bore, 227 mm stroke, output force, G3/8 port, and mounting accessories, fitting directly into existing fixtures.
The 63 mm bore features a G3/8 port and provides a push force of 1559 N and a pull force of 1402 N at 0.5 MPa. At 0.7 MPa the push force is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X227S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X227S replacement — usually within 7-8 hours.