This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1550STC, 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 SI63X1550STC
The AirTAC Airtac SI63 Standard Cylinder SI63X1550STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1550mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1550STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1550STC
- 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 SI63X1550STC
The AirTAC SI63X1550STC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and a 1550 mm stroke. Because 1550 mm exceeds the 1500 mm standard maximum for this bore, it is a non-standard, made-to-order length. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. AirTAC replaced this series with the SAI63X1550STC, a direct sharing the same ISO 15552 mounting interface, force, and TC trunnion accessory.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI accepts current AirTAC switches. If you need load holding on air loss, explore the SAIL or BSAI lock variants, as standard cushions only decelerate.
Airtac SI63 Standard Cylinder SI63X1550STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1550STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1550STC |
| Bore size | Ø63 mm |
| Stroke | 1550 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 SAI63X1550STC 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 SAI63X1550STC 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 SI63X1550STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1550 | 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 SI63X1550STC Is Used
Long-Reach Diverting
Drives a diverter arm across a wide conveyor belt, utilizing the full 1550 mm stroke to route large packages between sorting lanes.
High-Bay Extraction
Extracts totes from deep shelving units in automated storage systems, requiring the extended reach and 1559 N push force at 0.5 MPa.
Material Lowering
Lowers components into processing baths, where the TC trunnion mount accommodates the arc movement of the long actuator body.
Replacing the Airtac SI63 Standard Cylinder SI63X1550STC with the SAI63X1550STC
To replace the SI63X1550STC, order the SAI63X1550STC. Verify your ISO 15552 interface, 63 mm bore, 1550 mm non-standard stroke, G3/8 port, and TC trunnion mount. The -S magnet means you can use position sensors; swap legacy CS1-B/DS1-B switches for current AirTAC equivalents. When sizing, a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore provides 2513 N. For this 1550 mm stroke, external guides are critical to prevent rod bending and side-load damage. Remember, a plain cylinder drifts without air; for load holding, specify a pilot check valve, external rod lock, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1550STC
- ✓ 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 SI63X1550STC FAQ
Yes, the SI63X1550STC is discontinued. The direct replacement is the SAI63X1550STC. It features the same ISO 15552 mounting interface, 63 mm bore, 1550 mm stroke, output force, G3/8 port, and TC trunnion mount, but includes an upgraded piston seal for longer life.
This 63 mm bore double-acting cylinder uses a G3/8 air port. 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. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1550STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1550STC replacement — usually within 7-8 hours.