This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X740S, 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 SI63X740S
The AirTAC SI63 Standard Cylinder SI63X740S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 740mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X740S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke740 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X740S
- 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 SI63X740S
The AirTAC SI63X740S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 740mm stroke. Delivering 1559N push force at 0.5MPa via a G3/8 port, it is replaced by the direct replacement SAI63X740S. This upgrade retains identical mounting and dimensions but introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life.
The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI successor uses current AirTAC switches. You can also specify Viton H seals for 0-150C heat, or choose SUS304 (B) rod material.
Airtac SI63 Standard Cylinder SI63X740S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X740S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X740S |
| Bore size | Ø63 mm |
| Stroke | 740 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 SAI63X740S 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 SAI63X740S 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 SI63X740S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×740 | 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 SI63X740S Is Used
Material Diversion
Actuates large sorting gates on high-throughput packaging lines, utilizing the 1559N push force to reliably pivot heavy product flows.
Pallet Lowering
Drives the controlled descent of loaded pallets in automated storage systems, where the 740mm stroke accommodates deep vertical travel.
Press Ejection
Ejects formed metal or plastic components from machining centers, taking advantage of the adjustable end cushions to halt heavy masses smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X740S with the SAI63X740S
To replace the SI63X740S, order the SAI63X740S. It drops into existing fixtures via the identical ISO 15552 mounting interface, matching the 63mm bore, 740mm stroke, G3/8 port, M16x1.5 rod thread, and magnet. If you need more force, the 80mm bore offers 2513N push at 0.5MPa; if less is required, the 50mm bore provides 982N. Because the 740mm stroke is long, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts without air and its cushion only decelerates, so for load holding consider an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X740S
- ✓ 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 SI63X740S FAQ
Yes, the SI63X740S is discontinued. The direct replacement is the SAI63X740S. It is dimensionally interchangeable per the ISO 15552 mounting interface, preserving the 63mm bore, 740mm stroke, output force, and G3/8 port.
The 63mm bore uses a G3/8 port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa. The piston rod is 20mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X740S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X740S replacement — usually within 7-8 hours.