This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X20TC, 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 SI63X20TC
The AirTAC Airtac SI63 Standard Cylinder SI63X20TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 20mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X20TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X20TC
- 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 SI63X20TC
The AirTAC SI63X20TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 20 mm stroke, delivering 1559 N push force at 0.5 MPa. It features a G3/8 port and TC trunnion mounting. AirTAC replaced this legacy unit with the SAI63X20TC, a direct replacement retaining the exact interface, bore, stroke, force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. For load holding, note that a standard cylinder drifts without live air; the cushion only decelerates. Use the SAIL or BSAI lock variants if needed. Since this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X20TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X20TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X20TC |
| Bore size | Ø63 mm |
| Stroke | 20 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 SAI63X20TC 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 SAI63X20TC 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 SI63X20TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×20 | 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 SI63X20TC Is Used
Short-Stroke Clamping
Ideal for holding parts during machining operations where a compact 20 mm stroke and 1559 N force securely lock components in place.
Transfer Line Diverter
Provides robust actuation for routing goods on assembly conveyors, utilizing the TC trunnion mount to handle mid-stroke pivot stresses.
Ejector Mechanism
Delivers rapid ejection of finished parts from press lines, benefiting from the 30-800 mm/s speed range and adjustable end cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X20TC with the SAI63X20TC
To replace the discontinued SI63X20TC, order the SAI63X20TC. Verify the ISO 15552 TC trunnion mounting, 63 mm bore, 20 mm stroke, and G3/8 port (PT/G/NPT thread options). Because this specific SKU lacks the -S magnet, it cannot support position sensing; order the -S version if switches are required. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; if less force is needed, step down to a 50 mm bore (982 N), or up to an 80 mm bore (2513 N) for heavier loads. Remember that a plain cylinder does not hold load without air; add a pilot check valve or explore the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X20TC
- ✓ 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 SI63X20TC FAQ
Yes, the SI63X20TC is discontinued. The direct replacement is the SAI63X20TC. It is dimensionally interchangeable per ISO 15552, matching the bore, stroke, force, G3/8 port, and TC mounting interface.
The 63 mm bore 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, 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 SAI63X20TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X20TC replacement — usually within 7-8 hours.