This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X180, 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 SI63X180
The AirTAC Airtac SI63 Standard Cylinder SI63X180 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 180mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X180, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X180
- 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 SI63X180
The AirTAC SI63X180 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 1559 N push and 1402 N pull at 0.5 MPa through a 63 mm bore. Because this legacy SI unit is end-of-life, you should order the direct replacement: the SAI63X180. It preserves the same G3/8 port, M16x1.5 rod thread, 180 mm stroke, and ISO 15552 mounting interface to fit existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet, so it cannot accept a position sensor.
Airtac SI63 Standard Cylinder SI63X180 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X180 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X180 |
| Bore size | Ø63 mm |
| Stroke | 180 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 SAI63X180 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 SAI63X180 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 SI63X180
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×180 | 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 SI63X180 Is Used
Mid-Tonnage Clamping
Holds workpieces securely in machining fixtures using 1559 N of thrust at 0.5 MPa without exceeding safe load limits.
Package Diversion
Actuates routing gates and pushers along material handling lines with a 180 mm travel distance.
Replacing the Airtac SI63 Standard Cylinder SI63X180 with the SAI63X180
To replace the discontinued SI63X180, order the SAI63X180. Verify your ISO 15552 mounting accessory (LB foot, FA flange, or TC trunnion), the G3/8 port thread (PT/G/NPT), and the 180 mm stroke. Since this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B switches; if sensing is needed, select an SAI model with a magnet. For sizing alternatives, a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore provides 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X180
- ✓ 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 SI63X180 FAQ
Yes, the SI63X180 is discontinued. The direct replacement is the AirTAC SAI63X180, which shares the identical ISO 15552 mounting interface, 63 mm bore, 180 mm stroke, output force, and G3/8 port size. You can install the SAI unit directly into your existing fixtures.
The 63 mm bore features a G3/8 air port and an M16x1.5 rod 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 SAI63X180
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X180 replacement — usually within 7-8 hours.