This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X350SH, 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 SI63X350SH
The AirTAC Airtac SI63 Standard Cylinder SI63X350SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X350SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X350SH
- 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 SI63X350SH
The AirTAC SI63X350SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 350mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X350SH, matching the bore, stroke, force, port and mounting interface. The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure. This -H variant uses Viton seals for 0-150C, and the -S magnet works with CS1-B/DS1-B switches.
The SAI family adds SAIL, SAIF and BSAI variants the SI lacked. Air cushions only decelerate; use a pilot check valve or SAIL lock for load holding.
Airtac SI63 Standard Cylinder SI63X350SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X350SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X350SH |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAI63X350SH 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 SAI63X350SH 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 SI63X350SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SI63X350SH Is Used
High-Temp Diverting
Actuates routing gates on hot material conveyors, utilizing the Viton -H seal to withstand ambient thermal radiation up to 150C.
Press Ejection
Pushes finished parts out of an automated press with 1559N force at 0.5MPa, relying on the 350mm stroke to clear the bed.
Pallet Handling
Indexes heavy pallets along a transfer line, requiring external guide rails to support the rod over the long 350mm extension.
Replacing the Airtac SI63 Standard Cylinder SI63X350SH with the SAI63X350SH
To replace the SI63X350SH, order the SAI63X350SH. Verify the ISO 15552 mounting interface, 63mm bore, 350mm stroke, G3/8 port (PT/G/NPT thread) and your mounting accessory. The -S magnet enables CS1-B/DS1-B sensors (the SAI uses current AirTAC switches), while the -H option specifies Viton seals for 0-150C. At 0.5MPa it yields 1559N push; neighbouring bores are 50mm (982N) and 80mm (2513N). For the 350mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X350SH
- ✓ 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 SI63X350SH FAQ
Yes, the AirTAC SI63X350SH is discontinued. The direct replacement is the SAI63X350SH. It shares the same ISO 15552 mounting interface, 63mm bore, 350mm stroke, output force, G3/8 port and mounting accessories, fitting directly into existing fixtures.
This 63mm bore cylinder has a G3/8 port. The thrust is 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 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X350SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X350SH replacement — usually within 7-8 hours.