This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1640S, 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 SI63X1640S
The AirTAC Airtac SI63 Standard Cylinder SI63X1640S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1640mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1640S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1640 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1640S
- 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 SI63X1640S
The AirTAC SI63X1640S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 1640 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. Because 1640 mm exceeds the 1500 mm standard maximum, this is a non-standard, made-to-order length. AirTAC replaced this EOL unit with the SAI63X1640S, a direct sharing the same ISO 15552 mounting interface, stroke, output force, and accessories.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and valve variants (SAIL, BSAI, SAIF) absent in the legacy line. Your -S suffix indicates a piston magnet for CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X1640S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1640S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1640S |
| Bore size | Ø63 mm |
| Stroke | 1640 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 SAI63X1640S 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 SAI63X1640S 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 SI63X1640S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1640 | 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 SI63X1640S Is Used
Long-Stroke Material Transfer
Pushes workpieces between processing stations over extended 1640 mm distances where standard strokes fall short.
High-Bay Ejection
Provides the 1559 N push force needed to eject pallets or containers from elevated storage tiers.
Large Press Ejection
Extracts heavy formed parts from deep press beds, utilizing the full extended rod length and 63 mm bore power.
Replacing the Airtac SI63 Standard Cylinder SI63X1640S with the SAI63X1640S
To replace this SI cylinder, order the SAI63X1640S. Verify your existing fixture's ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 air port, and the M16x1.5 rod thread. If you need to adjust force, neighboring bores are 50 mm (982 N push @0.5 MPa) and 80 mm (2513 N push @0.5 MPa). Because this is a 1640 mm non-standard stroke exceeding the 1500 mm maximum, expect made-to-order lead times and ensure external guides support the rod to prevent bending under side-loads. A plain cylinder drifts without live air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The -S magnet works with legacy CS1-B/DS1-B switches, while the SAI uses current AirTAC sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1640S
- ✓ 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 SI63X1640S FAQ
Yes, the SI63X1640S is discontinued. The direct replacement is the AirTAC SAI63X1640S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 63 mm bore, 1640 mm stroke, G3/8 port, and output force.
The bore uses a G3/8 air port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push 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 SAI63X1640S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1640S replacement — usually within 7-8 hours.