This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X70TC, 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 SI63X70TC
The AirTAC Airtac SI63 Standard Cylinder SI63X70TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X70TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X70TC
- 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 SI63X70TC
The AirTAC SI63X70TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 70 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X70TC, which matches the bore, stroke, force, port and TC trunnion mounting.
Because this SKU lacks the -S magnet, it cannot accept a sensor. The SAI upgrade uses two Y-shaped one-way piston seals for low start-up pressure, and adds SAIL or BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X70TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X70TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X70TC |
| Bore size | Ø63 mm |
| Stroke | 70 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 SAI63X70TC 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 SAI63X70TC 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 SI63X70TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×70 | 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 SI63X70TC Is Used
Assembly Line Ejection
Provides 1559 N push at 0.5 MPa to eject completed parts from machining cells using the TC trunnion mount.
Package Diverting
Swing-arm diverting of mid-weight cartons on conveyors, utilizing the 70 mm stroke for rapid cycling.
Pallet Stop Gate
Acts as a pneumatic stop gate for pallets entering a wrapping zone, holding securely against normal flow.
Replacing the Airtac SI63 Standard Cylinder SI63X70TC with the SAI63X70TC
To replace the SI63X70TC, order the SAI63X70TC. Confirm the ISO 15552 TC trunnion interface, 63 mm bore, 70 mm stroke and G3/8 port (PT/G/NPT thread options). This non-magnetic SKU cannot take a switch; order an -S model if you need CS1-B/DS1-B sensing. Sizing both ways: a 50 mm bore gives 982 N [email protected], while an 80 mm bore gives 2513 N. 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 → SAI63X70TC
- ✓ 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 SI63X70TC FAQ
Yes, the SI63X70TC is discontinued. The direct replacement is the SAI63X70TC. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 70 mm stroke, 1559 N force, G3/8 port and TC trunnion mount.
The 63 mm bore uses a G3/8 port. Forces are: 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 SAI63X70TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X70TC replacement — usually within 7-8 hours.