This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X900TC, 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 SI63X900TC
The AirTAC Airtac SI63 Standard Cylinder SI63X900TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X900TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X900TC
- 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 SI63X900TC
The AirTAC SI63X900TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 900 mm stroke, delivering 1559 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X900TC. The SAI is a direct upgrade: it matches the exact ISO 15552 mounting interface, TC trunnion mount, M16x1.5 rod thread, and output force, fitting existing fixtures perfectly.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended lifespan. For this non-magnet SKU, position sensing is not possible. If high heat is a factor, Viton H seals raise the operating range to 150 C.
Airtac SI63 Standard Cylinder SI63X900TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X900TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X900TC |
| Bore size | Ø63 mm |
| Stroke | 900 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 SAI63X900TC 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 SAI63X900TC 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 SI63X900TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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 SI63X900TC Is Used
Long-Stroke Material Transfer
Pushes heavy pallets between conveyor zones using the 1559 N force and 900 mm reach, requiring external guides to prevent rod bending.
Large Fixture Actuation
Drives oversized clamping arms or welding fixtures through a full 900 mm cycle, relying on the 30 mm adjustable cushions to decelerate loads.
Replacing the Airtac SI63 Standard Cylinder SI63X900TC with the SAI63X900TC
To replace the SI63X900TC, order the SAI63X900TC. Confirm the ISO 15552 TC trunnion mounting, 63 mm bore, 900 mm stroke, G3/8 port, and M16x1.5 thread. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order an -S variant if sensing is required. Sizing both ways: a 50 mm bore yields 982 N push, while an 80 mm bore yields 2513 N at 0.5 MPa. For the 900 mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X900TC
- ✓ 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 SI63X900TC FAQ
Yes, the SI63X900TC is discontinued. The direct replacement is the SAI63X900TC. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 900 mm stroke, G3/8 port, TC mount, and output force, so it drops directly into existing fixtures.
The G3/8 port feeds a 20 mm rod. At 0.5 MPa it pushes 1559 N and pulls 1402 N. Push force is 2182 N at 0.7 MPa and 2805 N at 0.9 MPa. The theoretical max is 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X900TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X900TC replacement — usually within 7-8 hours.