This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X355S, 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 SI63X355S
The AirTAC Airtac SI63 Standard Cylinder SI63X355S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 355mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X355S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke355 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X355S
- 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 SI63X355S
The AirTAC SI63X355S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 355 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X355S, matching the exact bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X355S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X355S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X355S |
| Bore size | Ø63 mm |
| Stroke | 355 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 SAI63X355S 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 SAI63X355S 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 SI63X355S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×355 | 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 SI63X355S Is Used
Carton Diverting
Pushes packages at 30-800 mm/s on packaging lines, using the 1559 N thrust to redirect heavy goods without lag.
Pallet Handling
Extends 355 mm to index pallets on rollers, where the G3/8 air supply sustains rapid cycling across long shifts.
Replacing the Airtac SI63 Standard Cylinder SI63X355S with the SAI63X355S
To replace the SI63X355S, order the SAI63X355S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC), the G3/8 port, the M16x1.5 rod thread and the -S magnet for CS1-B/DS1-B sensors. Sizing both ways: a 50 mm bore yields 982 N push @0.5 MPa, while an 80 mm bore yields 2513 N. If you need to hold the load without live air, the cushion only decelerates; use an external rod lock or the SAIL/BSAI lock variant. For this 355 mm stroke, use an external guide to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X355S
- ✓ 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 SI63X355S FAQ
Yes, the SI63X355S is discontinued. The direct replacement is the SAI63X355S. It is dimensionally interchangeable per ISO 15552, retaining the same bore, stroke, force, G3/8 port and mounting accessories.
The 63 mm bore uses a G3/8 port. It outputs 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X355S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X355S replacement — usually within 7-8 hours.