This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X320SH, 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 SI63X320SH
The AirTAC SI63 Standard Cylinder SI63X320SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X320SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X320SH
- 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 SI63X320SH
The AirTAC SI63X320SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 320mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, its direct replacement is the SAI63X320SH. The SAI upgrade retains identical ISO 15552 mounting dimensions but introduces a two-piece Y-shaped piston seal for lower start-up pressure and extended life. It also supports Viton H seals for 0-150 C environments, and your existing -S magnet works with legacy CS1-B/DS1-B sensors.
Because this is a 320mm stroke, external guides are recommended to prevent rod bending under side loads. Note that standard cylinders do not hold loads without live air; the cushions only decelerate. For secure holding, consider the SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63X320SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X320SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X320SH |
| Bore size | Ø63 mm |
| Stroke | 320 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 SAI63X320SH 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 SAI63X320SH 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 SI63X320SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×320 | 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 SI63X320SH Is Used
Clamp and Form Operations
Ideal for mid-tier press tasks, delivering 1559 N of push force at 0.5 MPa to secure and form metal or composite parts.
Package Diversion
The 320mm stroke provides ample travel to actuate diverters or gates across standard conveyor lanes in sorting lines.
Vertical Material Lift
With a safe vertical lift capacity of roughly 79 kg, it functions reliably in automated elevators and lift stations.
Replacing the Airtac SI63 Standard Cylinder SI63X320SH with the SAI63X320SH
To replace the discontinued SI63X320SH, order the SAI63X320SH. It is a direct: matching the 63mm bore, 320mm stroke, G3/8 port, M16x1.5 rod thread, and ISO 15552 mounting interface. Confirm your thread standard (PT, G, or NPT) and mounting accessories (LB, FA, TC, etc.). The -S magnet enables CS1-B/DS1-B sensors, while the -H option specifies Viton seals for 150 C heat. If you need more force than the 1559 N at 0.5 MPa, step up to an 80mm bore; if less is required, a 50mm bore provides 982 N. For this 320mm stroke, use external guides to mitigate rod-bending side loads. Finally, a plain cylinder drifts on air loss—use a pilot check valve or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X320SH
- ✓ 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 SI63X320SH FAQ
Yes, the SI63X320SH is discontinued. The direct replacement is the SAI63X320SH. It shares the exact same ISO 15552 mounting interface, 63mm bore, 320mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
It features a G3/8 air port. The force output is 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. Speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X320SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X320SH replacement — usually within 7-8 hours.