This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X76, 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 SI63X76
The AirTAC Airtac SI63 Standard Cylinder SI63X76 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 76mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X76, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke76 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X76
- 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 SI63X76
The AirTAC SI63X76 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 76 mm stroke, delivering 1559 N push force at 0.5 MPa. It is replaced by the SAI63X76 direct upgrade, which matches the original G3/8 port, M16x1.5 rod thread and 30 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnet SKU cannot take a sensor. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI63 Standard Cylinder SI63X76 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X76 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X76 |
| Bore size | Ø63 mm |
| Stroke | 76 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 SAI63X76 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 SAI63X76 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 SI63X76
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×76 | 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 SI63X76 Is Used
Clamp Actuation
Provides 1559 N of push force at 0.5 MPa to secure heavy metal workpieces during machining operations.
Package Diverting
Uses the 76 mm stroke to push cartons off a main conveyor belt into secondary packing lanes.
Pallet Stopper
Acts as a robust pneumatic stop gate for inbound pallets, utilizing its 1402 N pull force to retract.
Replacing the Airtac SI63 Standard Cylinder SI63X76 with the SAI63X76
To replace the SI63X76, order the SAI63X76. It drops into existing ISO 15552 fixtures with identical bore, stroke, port and mounting. Confirm your port thread (PT/G/NPT) and accessory type. This SKU lacks a magnet, so it cannot accept CS1-B/DS1-B switches. If you need sensing, specify an SAI63X76S. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. To size both ways: a 50 mm bore gives 982 N [email protected], while an 80 mm bore gives 2513 N. The 76 mm stroke is short, so side-load risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X76
- ✓ 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 SI63X76 FAQ
Yes, the SI63X76 is discontinued. The direct replacement is the SAI63X76. It shares the same ISO 15552 mounting interface, 63 mm bore, 76 mm stroke, output force, G3/8 port and accessories, fitting existing fixtures perfectly.
The 63 mm bore features a G3/8 air port. It delivers 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 max of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Request a Quote for the SAI63X76
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X76 replacement — usually within 7-8 hours.