This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X300TC, 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 SI63X300TC
The AirTAC SI63 Standard Cylinder SI63X300TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X300TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X300TC
- 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 SI63X300TC
The AirTAC SI63X300TC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 300mm stroke, delivering 1559 N push force at 0.5 MPa. As an end-of-line unit, it is replaced by the SAI63X300TC direct equivalent. This upgrade retains the exact TC trunnion mount, G3/8 port, and output force, but introduces an upgraded piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life.
Because this SKU lacks the -S magnet, it cannot accept a position sensor. For load holding, note that standard air cushions only decelerate the piston near stroke end and will not prevent drift on air loss; use a pilot check valve or the SAIL lock variant for secure holding.
Airtac SI63 Standard Cylinder SI63X300TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X300TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X300TC |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAI63X300TC 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 SAI63X300TC 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 SI63X300TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SI63X300TC Is Used
Trunnion-Mounted Ejector
Ideal for pushing finished parts out of a CNC fixture using the 1559 N output, with the TC mount allowing pivotal articulation to absorb minor misalignment during the ejection arc.
Package Divert Arm
Handles 300mm stroke routing of moderate-weight goods between conveyor belts, relying on adjustable air cushions to decelerate the diverter arm smoothly at travel ends.
Pallet Stopper Gate
Deploys a 63mm bore stop gate to arrest pallets on a gravity roller track, providing firm resistance with a theoretical maximum of 318 kgf at 1.0 MPa.
Replacing the Airtac SI63 Standard Cylinder SI63X300TC with the SAI63X300TC
To replace the SI63X300TC, order the SAI63X300TC. Confirm the ISO 15552 TC trunnion interface, 63mm bore, 300mm stroke, G3/8 port, and M16x1.5 rod thread. Since this is a no-magnet SKU, it cannot support legacy CS1-B/DS1-B sensors; add the -S suffix if sensing is needed. For sizing, the 63mm bore yields 1559 N push at 0.5 MPa; if less force is required, a 50mm bore provides 982 N, while an 80mm bore offers 2513 N. At 300mm stroke, use external guides to prevent rod bending and side-load damage. The cushion only decelerates the load; for dead-load holding, select the SAIL or BSAI lock variant, or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X300TC
- ✓ 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 SI63X300TC FAQ
Yes, the SI63X300TC is discontinued. The direct replacement is the SAI63X300TC. It shares the identical ISO 15552 mounting interface, 63mm bore, 300mm stroke, G3/8 port, and TC trunnion mount, fitting directly into existing fixtures without modification.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X300TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X300TC replacement — usually within 7-8 hours.