This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X650TC, 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 SI63X650TC
The AirTAC Airtac SI63 Standard Cylinder SI63X650TC 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 SAI63X650TC, 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 → SAI63X650TC
- 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 SI63X650TC
The AirTAC SI63X650TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 650 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X650TC, a direct upgrade sharing the exact ISO 15552 mounting interface, TC trunnion mount, stroke and force.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU lacks the -S magnet, meaning it cannot accept CS1-B/DS1-B sensors. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent in the SI line.
Airtac SI63 Standard Cylinder SI63X650TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X650TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X650TC |
| 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 SAI63X650TC 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 SAI63X650TC 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 SI63X650TC
| 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 SI63X650TC Is Used
Long-Stroke Diversion
Actuates large diverter arms on material handling lines, utilizing the 650 mm stroke to clear wide pallets.
Industrial Door Operation
Opens and closes heavy machine access doors, relying on the 1559 N thrust at 0.5 MPa to move substantial mass.
Replacing the Airtac SI63 Standard Cylinder SI63X650TC with the SAI63X650TC
To replace the SI63X650TC, order the SAI63X650TC. Confirm the ISO 15552 TC trunnion mounting interface, 63 mm bore, 650 mm stroke, G3/8 port and double-acting operation match your fixture. Because this is a no-S SKU, it cannot support magnetic sensing; if position detection is needed, select an SAI model with the -S magnet option. For sizing, a neighbouring 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 650 mm, prevent rod bending by guiding the load externally to avoid side-loading.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X650TC
- ✓ 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 SI63X650TC FAQ
Yes, the SI63X650TC is discontinued. The direct replacement is the SAI63X650TC. It shares the identical ISO 15552 mounting interface, 63 mm bore, 650 mm stroke, output force, G3/8 port and TC trunnion mount, fitting directly into existing fixtures.
It features a G3/8 air port and provides 1559 N push and 1402 N pull at 0.5 MPa. At 0.7 MPa push is 2182 N, and 2805 N at 0.9 MPa. The theoretical maximum force is 318 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 30 mm adjustable air cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X650TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X650TC replacement — usually within 7-8 hours.