This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X450TC, 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 SI63X450TC
The AirTAC Airtac SI63 Standard Cylinder SI63X450TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X450TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X450TC
- 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 SI63X450TC
The AirTAC SI63X450TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 450 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa, utilizing a G3/8 port and a TC trunnion mount. AirTAC replaced this legacy unit with the SAI63X450TC, a direct replacement matching the exact ISO 15552 mounting interface, force, and dimensions.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. If high-temperature operation is needed, Viton H seals raise the limit to 150 C.
Airtac SI63 Standard Cylinder SI63X450TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X450TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X450TC |
| Bore size | Ø63 mm |
| Stroke | 450 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 SAI63X450TC 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 SAI63X450TC 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 SI63X450TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×450 | 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 SI63X450TC Is Used
Pallet Transfer
Indexes heavy pallets along a TC-mounted conveyor line, utilizing the 1559 N push force at 0.5 MPa to overcome friction during transit.
Case Pushing
Pushes packed shipping cases from roller beds, relying on the adjustable air cushions to decelerate the rod smoothly at stroke end.
Replacing the Airtac SI63 Standard Cylinder SI63X450TC with the SAI63X450TC
To replace the SI63X450TC, order the SAI63X450TC. Verify the TC trunnion mounting, G3/8 port, and M16x1.5 rod thread. Because this SKU has no magnet, it cannot support position sensing; order an SAI variant with the S suffix if switches are required. At 0.5 MPa, the 63 mm bore yields 1559 N push; if undersized, the 80 mm bore provides 2513 N. For the 450 mm stroke, use external guides to prevent rod bending and side-load damage. The air cushion only decelerates the piston; it does not hold the load. For secure load holding on air loss, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X450TC
- ✓ 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 SI63X450TC FAQ
Yes, the SI63X450TC is discontinued. The direct replacement is the SAI63X450TC. It shares the identical ISO 15552 mounting interface, 63 mm bore, 450 mm stroke, G3/8 port, and TC trunnion mount, fitting directly into existing fixtures.
The 63 mm bore uses a G3/8 port. At 0.5 MPa it provides 1559 N push and 1402 N pull. At 0.7 MPa push is 2182 N, and 2805 N at 0.9 MPa. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X450TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X450TC replacement — usually within 7-8 hours.