This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X15TC, 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 SI63X15TC
The AirTAC Airtac SI63 Standard Cylinder SI63X15TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 15mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X15TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke15 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X15TC
- 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 SI63X15TC
The AirTAC SI63X15TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 15 mm stroke, and a TC trunnion mount. Delivering 1559 N push force at 0.5 MPa, it is replaced by the SAI63X15TC. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. This SKU lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X15TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X15TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X15TC |
| Bore size | Ø63 mm |
| Stroke | 15 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 SAI63X15TC 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 SAI63X15TC 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 SI63X15TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×15 | 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 SI63X15TC Is Used
Short-Stroke Clamping
Ideal for holding parts during machining, using the 1559 N push force to secure heavy castings firmly within a compact 15 mm travel.
Ejector Stations
Provides a rapid 30-800 mm/s ejection impulse on automated lines, knocking finished goods out of fixtures despite the short stroke.
Valve Actuation
Delivers reliable linear thrust to pivot heavy diverter valves or process dampers where a robust 63 mm bore and TC mount are required.
Replacing the Airtac SI63 Standard Cylinder SI63X15TC with the SAI63X15TC
To replace the SI63X15TC, order the SAI63X15TC, confirming the TC trunnion mount, 15 mm stroke, and G3/8 port. Because this non-magnet SKU cannot take a switch, add a -S suffix if sensing is needed. The 63 mm bore yields 1559 N push at 0.5 MPa; sizing down to a 50 mm bore gives 982 N, while sizing up to 80 mm provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variants to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X15TC
- ✓ 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 SI63X15TC FAQ
Yes, the SI63X15TC is discontinued. The direct replacement is the SAI63X15TC. It shares the same ISO 15552 mounting interface, 63 mm bore, 15 mm stroke, output force, G3/8 port, and TC trunnion mount, fitting existing fixtures perfectly.
The 63 mm bore features 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 max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X15TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X15TC replacement — usually within 7-8 hours.