This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X30H, 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 SI63X30H
The AirTAC SI63 Standard Cylinder SI63X30H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 30mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X30H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke30 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X30H
- 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 SI63X30H
The AirTAC SI63X30H is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 30 mm stroke. This high-temp variant used Viton H seals (0-150 C) and delivered 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced it with the SAI63X30H, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, force and port.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SKU lacks a magnet (-S), it cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X30H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X30H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X30H |
| Bore size | Ø63 mm |
| Stroke | 30 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 SAI63X30H 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 SAI63X30H 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 SI63X30H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×30 | 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 SI63X30H Is Used
High-Temp Clamping
Short-stroke clamping of cast parts in warm environments up to 150 C using the Viton H seal, delivering 1559 N of secure holding force at 0.5 MPa.
Ejector Mechanism
Rapid 30 mm ejection of machined components from a fixture, leveraging the 30-800 mm/s speed range and robust 20 mm carbon steel rod.
Valve Actuation
Switching heavy process valves in industrial lines where the 63 mm bore provides positive actuation and the G3/8 port ensures adequate flow.
Replacing the Airtac SI63 Standard Cylinder SI63X30H with the SAI63X30H
To replace the SI63X30H, order the SAI63X30H and verify the ISO 15552 interface, 63 mm bore, 30 mm stroke, G3/8 port and mounting accessory. This non-magnetic SKU cannot take a sensor; if position detection is needed, select an SAI63X30HS. For lower force, a 50 mm bore yields 982 N push at 0.5 MPa; for higher force, an 80 mm bore gives 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads. The SAI family also adds the SAIF self-valve option (bores 32-100) the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X30H
- ✓ 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 SI63X30H FAQ
Yes, the SI63X30H is discontinued. The direct replacement is the AirTAC SAI63X30H. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 30 mm stroke, G3/8 port, output force and mounting interface, but features an upgraded two Y-shaped element piston seal.
The 63 mm bore features a G3/8 air port and a 20 mm rod with an M16x1.5 thread. 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 maximum of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X30H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X30H replacement — usually within 7-8 hours.