This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X65SH, 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 SI63X65SH
The AirTAC SI63 Standard Cylinder SI63X65SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 65mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X65SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke65 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X65SH
- 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 SI63X65SH
The AirTAC SI63X65SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 65mm stroke. Delivering 1559N push force at 0.5MPa, it is directly replaced by the SAI63X65SH. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -H suffix denotes a Viton H seal, extending operating temperature to 0-150 C. For load holding, note that air cushions only decelerate; use an external rod lock or pilot check valve. The -S magnet supports legacy CS1-B/DS1-B sensors, while SAI uses current AirTAC switches.
Airtac SI63 Standard Cylinder SI63X65SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X65SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X65SH |
| Bore size | Ø63 mm |
| Stroke | 65 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 SAI63X65SH 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 SAI63X65SH 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 SI63X65SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×65 | 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 SI63X65SH Is Used
Clamp Actuation
Ideal for mid-tier clamping tasks on machining fixtures, utilizing the 1559N push force at 0.5MPa to secure heavy workpieces.
Product Diversion
Drives diverter arms on assembly lines, where the 65mm stroke provides rapid switching without excessive cycle time.
Pallet Stops
Functions as a robust pneumatic stop for medium-weight pallets, with the G3/8 port ensuring rapid actuation.
Replacing the Airtac SI63 Standard Cylinder SI63X65SH with the SAI63X65SH
To replace the SI63X65SH, order the SAI63X65SH. Confirm the ISO 15552 mounting interface, 65mm stroke, G3/8 port, and -S magnet. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Size both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. If the stroke were 300mm or longer, you would need to account for side-load and rod-bending risks, but this 65mm stroke is well within safe limits. Remember, a plain cylinder drifts without live air; use an external rod lock or pilot check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X65SH
- ✓ 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 SI63X65SH FAQ
Yes, the SI63X65SH is discontinued. The direct replacement is the AirTAC SAI63X65SH. It shares the same ISO 15552 mounting interface, 63mm bore, 65mm stroke, output force, G3/8 port, and accessories, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/8 air port. It delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318 kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X65SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X65SH replacement — usually within 7-8 hours.