This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1520STC, 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 SI63X1520STC
The AirTAC SI63 Standard Cylinder SI63X1520STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1520mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1520STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1520 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1520STC
- 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 SI63X1520STC
The AirTAC SI63X1520STC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 1520 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. Because 1520 mm exceeds the 1500 mm standard limit, it is a non-standard made-to-order unit. The direct replacement is the SAI63X1520STC, matching the interface, force, and TC trunnion mount.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL and BSAI lock variants absent in the SI line. The -S suffix means a magnet for CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X1520STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1520STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1520STC |
| Bore size | Ø63 mm |
| Stroke | 1520 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 SAI63X1520STC 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 SAI63X1520STC 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 SI63X1520STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1520 | 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 SI63X1520STC Is Used
Long-Stroke Transfer
Moves components between distant workstations on a production line using the full 1520 mm travel distance.
Actuated Tooling Slide
Positions machining heads or fixtures along extended axes, relying on the TC trunnion for pivotal alignment.
Replacing the Airtac SI63 Standard Cylinder SI63X1520STC with the SAI63X1520STC
To replace the SI63X1520STC, order the SAI63X1520STC. Verify the ISO 15552 TC trunnion interface, 63 mm bore, 1520 mm stroke, G3/8 port, and the -S magnet for CS1-B/DS1-B switches. Sizing both ways: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. This 1520 mm stroke exceeds the 1500 mm standard, requiring external guides to prevent rod bending under side loads. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1520STC
- ✓ 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 SI63X1520STC FAQ
Yes, the SI63X1520STC is discontinued. The direct replacement is the SAI63X1520STC. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 1520 mm stroke, G3/8 port, TC mount, and output force.
This double-acting cylinder uses a G3/8 port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1520STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1520STC replacement — usually within 7-8 hours.