This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X115H, 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 SI63X115H
The AirTAC Airtac SI63 Standard Cylinder SI63X115H 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 SAI63X115H, 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 → SAI63X115H
- 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 SI63X115H
The AirTAC SI63X115H is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 115 mm stroke, and Viton H high-temperature seals (0-150 C). Delivering 1559 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI63X115H.
This SAI direct maintains the exact ISO 15552 mounting interface, M16x1.5 rod thread, and 30 mm cushions. The SAI features an upgraded piston seal (two Y-shaped elements for low start-up pressure). Without a -S magnet, this SKU cannot take a sensor.
Airtac SI63 Standard Cylinder SI63X115H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X115H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X115H |
| 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 SAI63X115H 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 SAI63X115H 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 SI63X115H
| 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 SI63X115H Is Used
Hot-End Part Ejection
Uses the Viton H seals (0-150 C) and 1559 N force to push molded components out of heated machinery safely.
High-Temp Diverting
Actuates routing gates on warm material conveyors where standard NBR seals would degrade quickly.
Press Clamping
Provides reliable 115 mm stroke clamping on light assembly presses, taking advantage of the 2182 N push at 0.7 MPa.
Replacing the Airtac SI63 Standard Cylinder SI63X115H with the SAI63X115H
To replace the SI63X115H, order the SAI63X115H. Confirm the ISO 15552 mounting fixture, 115 mm stroke, G3/8 port (PT/G/NPT), and Viton H seal. This non-magnetic SKU lacks a sensor groove piston, so CS1-B/DS1-B switches cannot fit. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; dropping to a 50 mm bore gives 982 N, while an 80 mm bore provides 2513 N. The air cushion only decelerates; it does not hold load on air loss. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The 115 mm stroke is short, so rod-bending side loads are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X115H
- ✓ 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 SI63X115H FAQ
Yes, the SI63X115H is discontinued. The direct replacement is the SAI63X115H. It shares the identical ISO 15552 mounting interface, 63 mm bore, 115 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
It features a G3/8 port. Force output is 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and 2805 N push at 0.9 MPa. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X115H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X115H replacement — usually within 7-8 hours.