This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X225TC, 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 SI63X225TC
The AirTAC Airtac SI63 Standard Cylinder SI63X225TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 225mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X225TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X225TC
- 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 SI63X225TC
The AirTAC SI63X225TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 225 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port and M16x1.5 rod. The direct replacement is the SAI63X225TC, which shares the exact ISO 15552 mounting interface, TC trunnion accessory, and output force.
Because this SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure, and adds SAIL, SAIF and BSAI variants.
Airtac SI63 Standard Cylinder SI63X225TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X225TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X225TC |
| Bore size | Ø63 mm |
| Stroke | 225 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 SAI63X225TC 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 SAI63X225TC 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 SI63X225TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×225 | 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 SI63X225TC Is Used
Material Diversion
Drives TC-mounted routing gates on packaging lines, using the 1559 N thrust to push heavy cartons onto secondary tracks at 30-800 mm/s.
Pallet Handling
Actuates 79 kg vertical lift mechanisms for pallet stops, relying on the 225 mm stroke to clear pallet forks during automated retrieval.
Fixture Clamping
Secures mid-size machined components in machining centers, providing stable clamping via the rigid ISO 15552 profile barrel.
Replacing the Airtac SI63 Standard Cylinder SI63X225TC with the SAI63X225TC
To replace the SI63X225TC, order the SAI63X225TC and confirm the ISO 15552 TC trunnion mount, 63 mm bore, 225 mm stroke, and G3/8 port (PT/G/NPT thread options). This non-magnetic SKU cannot take a switch; if sensing is needed, select an SAI model with the S magnet suffix. For sizing both ways, neighbouring bores are 50 mm (982 N push @0.5 MPa) and 80 mm (2513 N push @0.5 MPa). Since the 225 mm stroke exceeds 300 mm, ensure adequate guide support to prevent rod bending and side-load wear. A plain cylinder does not hold load without live air; for load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X225TC
- ✓ 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 SI63X225TC FAQ
Yes, the SI63X225TC is discontinued. The direct replacement is the AirTAC SAI63X225TC. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 63 mm bore, 225 mm stroke, G3/8 port, and TC trunnion mount. The SAI features an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
The 63 mm bore uses a G3/8 air port and an M16x1.5 rod thread. Force output is 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 maximum of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X225TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X225TC replacement — usually within 7-8 hours.