This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X115S, 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 SI63X115S
The AirTAC Airtac SI63 Standard Cylinder SI63X115S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 115mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X115S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X115S
- 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 SI63X115S
The AirTAC SI63X115S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 115 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X115S, matching the bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This -S model has a piston magnet for legacy CS1-B/DS1-B sensors. For load holding, note the cushion only decelerates; use the SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63X115S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X115S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X115S |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAI63X115S 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 SAI63X115S 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 SI63X115S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SI63X115S Is Used
Clamp Actuation
Provides 1559 N of push force at 0.5 MPa to secure mid-weight workpieces during machining operations.
Package Diversion
Uses the 115 mm stroke to push cartons cleanly across transfer lines without overtravel.
Pallet Stopper
Acts as a robust pneumatic stop for inbound pallets, absorbing kinetic energy via its 30 mm cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X115S with the SAI63X115S
To replace the SI63X115S, order the SAI63X115S. Confirm the ISO 15552 mounting interface, 63 mm bore, 115 mm stroke, G3/8 port (PT/G/NPT threads), M16x1.5 rod, and the -S magnet for CS1-B/DS1-B switches. Sizing both ways: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. A plain cylinder drifts on air loss; for held loads use the SAIL (air-released lock) or BSAI (clamp-lock) variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X115S
- ✓ 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 SI63X115S FAQ
Yes, the AirTAC SI63X115S is discontinued. The direct replacement is the SAI63X115S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 115 mm stroke, output force, G3/8 port and mounting accessories.
This 63 mm bore double-acting cylinder uses a G3/8 port. It generates 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 SAI63X115S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X115S replacement — usually within 7-8 hours.