This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX115S, 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 SI63AX115S
The AirTAC Airtac SI63 Standard Cylinder SI63AX115S 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 SAI63AX115S, 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 → SAI63AX115S
- 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 SI63AX115S
The AirTAC SI63AX115S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 115mm stroke. It delivers 1559N push force at 0.5MPa through a G3/8 port. The direct replacement is the SAI63AX115S, matching the exact bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI63AX115S includes the -S magnet for CS1-B/DS1-B sensors and the -A SUS420J2 stainless rod.
Airtac SI63 Standard Cylinder SI63AX115S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX115S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX115S |
| 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 SAI63AX115S 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 SAI63AX115S 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 SI63AX115S
| 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 SI63AX115S Is Used
Mid-Tonnage Clamping
Secures heavy workpieces in machining fixtures using its 1559N push force and 115mm travel.
Package Diversion
Actuates routing gates on assembly lines, providing reliable stroke length for product sorting.
Material Lift Stops
Controls pallet stops in vertical material handling, safely managing loads up to 79kg.
Replacing the Airtac SI63 Standard Cylinder SI63AX115S with the SAI63AX115S
To replace the SI63AX115S, order the SAI63AX115S. Confirm the ISO 15552 mounting interface, 115mm stroke, G3/8 port, and mounting accessory. The -S magnet enables current AirTAC switches, while the -A code specifies the SUS420J2 stainless rod over standard carbon steel. The SAI family also adds SAIL, SAIF, and BSAI lock variants. For sizing, the 63mm bore yields 1559N push at 0.5MPa; dropping to a 50mm bore gives 982N, while an 80mm bore provides 2513N. A plain cylinder drifts on air loss as the cushion only decelerates, so use an external rod lock or pilot check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX115S
- ✓ 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 SI63AX115S FAQ
Yes, the SI63AX115S is discontinued. The direct replacement is the SAI63AX115S. It features the same ISO 15552 mounting interface, 63mm bore, 115mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
This 63mm bore cylinder uses a G3/8 air port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and 2805N push at 0.9MPa. The theoretical maximum force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX115S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX115S replacement — usually within 7-8 hours.