This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X350TC, 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 SI63X350TC
The AirTAC SI63 Standard Cylinder SI63X350TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X350TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X350TC
- 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 SI63X350TC
The AirTAC SI63X350TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 350 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X350TC, which shares the exact TC trunnion mounting interface, M16x1.5 rod thread, and output force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and extended life. Note this non-magnet SKU cannot take a sensor; legacy CS1-B/DS1-B switches require the -S version.
Airtac SI63 Standard Cylinder SI63X350TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X350TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X350TC |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAI63X350TC 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 SAI63X350TC 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 SI63X350TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SI63X350TC Is Used
Material Diversion
Drives a 350 mm stroke diverter arm on a packaging line, utilizing the 1559 N push force to redirect heavy cartons reliably.
Pallet Handling
Actuates a TC trunnion-mounted lifting mechanism for pallet positioning, benefiting from the 79 kg vertical lift capacity.
Press Ejection
Ejects machined components from a fixture using the 1402 N pull force, with the 30 mm adjustable cushion decelerating the load.
Replacing the Airtac SI63 Standard Cylinder SI63X350TC with the SAI63X350TC
To replace the SI63X350TC, order the SAI63X350TC. Confirm the ISO 15552 TC trunnion mount, G3/8 port, and 350 mm stroke. Because this SKU lacks a magnet (-S), it cannot accept position sensors; order the -S variant if CS1-B/DS1-B sensing is needed. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; dropping to a 50 mm bore gives 982 N, while an 80 mm bore provides 2513 N. At 350 mm, prevent rod bending by using an external guide to handle side loads. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X350TC
- ✓ 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 SI63X350TC FAQ
Yes, the SI63X350TC is discontinued. The direct replacement is the SAI63X350TC. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 350 mm stroke, G3/8 port, TC trunnion mount, and output force.
The 63 mm bore uses a G3/8 port. It delivers 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X350TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X350TC replacement — usually within 7-8 hours.