This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X280, 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 SI63X280
The AirTAC Airtac SI63 Standard Cylinder SI63X280 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X280, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X280
- 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 SI63X280
The AirTAC SI63X280 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 280mm stroke, delivering 1559N push force at 0.5MPa. The direct replacement is the SAI63X280, sharing the same interface, G3/8 port, and mounting hardware.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet and cannot take a sensor.
Airtac SI63 Standard Cylinder SI63X280 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X280 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X280 |
| Bore size | Ø63 mm |
| Stroke | 280 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 SAI63X280 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 SAI63X280 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 SI63X280
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×280 | 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 SI63X280 Is Used
Material Diversion
Actuates routing gates on 63mm bore transfer lines, using the 280mm stroke to shift heavy pallets between adjacent conveyor belts safely.
Press Ejection
Provides reliable push-off force from machining centers, moving metal castings clear of the tooling zone before the next automated cycle begins.
Pallet Stopping
Functions as a robust end-stop in automated storage systems, decelerating incoming 79kg vertical-load equivalents using adjustable air cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X280 with the SAI63X280
To replace the SI63X280, order the SAI63X280 and confirm the ISO 15552 mounting interface, 63mm bore, 280mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. Since this SKU lacks a magnet, it cannot accept CS1-B/DS1-B sensors. For sizing, the 63mm bore yields 1559N push at 0.5MPa; drop to 50mm for 982N or step up to 80mm for 2513N. At 280mm stroke, use a guide to prevent rod bending and side loads. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X280
- ✓ 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 SI63X280 FAQ
Yes, the SI63X280 is discontinued. The direct replacement is the SAI63X280. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 280mm stroke, output force, G3/8 port, and mounting interface.
The 63mm bore features a G3/8 port and M16x1.5 rod thread. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Request a Quote for the SAI63X280
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X280 replacement — usually within 7-8 hours.