This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X340SN, 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 SI63X340SN
The AirTAC SI63 Standard Cylinder SI63X340SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 340mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X340SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke340 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X340SN
- 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 SI63X340SN
The AirTAC SI63X340SN is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 340mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X340SN, matching the bore, stroke, force, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This NBR sealed unit operates -20 to +70C, and the SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X340SN Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X340SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X340SN |
| Bore size | Ø63 mm |
| Stroke | 340 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 SAI63X340SN 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 SAI63X340SN 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 SI63X340SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×340 | 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 SI63X340SN Is Used
Clamping Fixtures
Holds workpieces securely during machining with 1559N push force at 0.5 MPa, utilizing the 340mm stroke to accommodate varying part sizes.
Product Diverting
Actuates routing gates on packaging lines, where the 79kg vertical lift capacity and double-acting profile design ensure reliable sorting.
Pallet Handling
Pushes or lifts goods within automated storage systems, requiring external guides to manage side-load over the 340mm extension.
Replacing the Airtac SI63 Standard Cylinder SI63X340SN with the SAI63X340SN
To replace the SI63X340SN, order the SAI63X340SN direct: verify the ISO 15552 interface, 63mm bore, 340mm stroke, G3/8 port, M16x1.5 thread, and the -S magnet for CS1-B/DS1-B sensors. If downsizing, a 50mm bore yields 982N push at 0.5MPa; if upsizing, an 80mm bore yields 2513N. Because this is a 340mm stroke, use external guides to prevent rod bending and side-load wear. For load holding, note that the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variant, as air loss causes drift.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X340SN
- ✓ 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 SI63X340SN FAQ
Yes, the SI63X340SN is discontinued. The direct replacement is the SAI63X340SN, which shares the identical ISO 15552 mounting interface, 63mm bore, 340mm stroke, output force, and G3/8 port.
It features a G3/8 air port and generates 1559N push / 1402N pull at 0.5 MPa, 2182N push at 0.7 MPa, and a maximum theoretical force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X340SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X340SN replacement — usually within 7-8 hours.