This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X650SH, 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 SI63X650SH
The AirTAC Airtac SI63 Standard Cylinder SI63X650SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X650SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X650SH
- 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 SI63X650SH
The AirTAC SI63X650SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 650mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63X650SH. This direct successor shares the exact ISO 15552 mounting interface, bore, stroke, force, and accessories. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -H suffix specifies a Viton FKM seal for 0-150 C high-temp environments.
The -S magnet enables legacy CS1-B/DS1-B position sensing, which the SAI family updates with current AirTAC switches. Note that a standard cylinder does not hold load without live air; the cushion only decelerates near stroke end. For secure holding, specify an external pilot check valve or the SAIL lock variant.
Airtac SI63 Standard Cylinder SI63X650SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X650SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X650SH |
| Bore size | Ø63 mm |
| Stroke | 650 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 SAI63X650SH 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 SAI63X650SH 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 SI63X650SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×650 | 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 SI63X650SH Is Used
Long-Stroke Diversion
Ideal for pushing heavy pallets or product lanes across a 650mm span on packaging lines, utilizing the 1559 N thrust at 0.5 MPa.
Elevated Temperature Press
The Viton H seal allows operation up to 150 C in hot-end stamping or drying ovens where standard NBR seals would fail.
Replacing the Airtac SI63 Standard Cylinder SI63X650SH with the SAI63X650SH
To replace the discontinued SI63X650SH, order the SAI63X650SH direct. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 63mm bore, 650mm stroke, G3/8 port, and M16x1.5 rod thread. The -S magnet and -H Viton high-temp seal must be specified on the new order. For load holding without live air, the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because 650mm exceeds 300mm, prevent rod bending and side-load wear by using external guides. If downsizing, a 50mm bore gives 982 N push at 0.5 MPa; if upsizing, an 80mm bore provides 2513 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X650SH
- ✓ 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 SI63X650SH FAQ
Yes, the SI63X650SH is discontinued. The direct replacement is the SAI63X650SH. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 650mm stroke, G3/8 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. It delivers 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 force of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X650SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X650SH replacement — usually within 7-8 hours.