This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X50TC, 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 SI63X50TC
The AirTAC Airtac SI63 Standard Cylinder SI63X50TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X50TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X50TC
- 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 SI63X50TC
The AirTAC SI63X50TC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 50mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced it with the SAI63X50TC, a direct sharing the same TC trunnion mount, bore, force and ISO 15552 interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. This SKU lacks a magnet, so it cannot take a sensor. For higher temps use Viton H seals; for load holding explore SAIL or BSAI locks.
Airtac SI63 Standard Cylinder SI63X50TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X50TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X50TC |
| Bore size | Ø63 mm |
| Stroke | 50 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 SAI63X50TC 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 SAI63X50TC 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 SI63X50TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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 SI63X50TC Is Used
Clamp Actuation
Provides 1559N of clamping force at 0.5MPa for holding medium-duty workpieces in CNC machining fixtures.
Package Diversion
Drives a 50mm stroke diverter arm to route boxes on assembly lines, utilizing the ISO 15552 TC trunnion mount for pivot action.
Pallet Stopper
Acts as a pneumatic stop for inbound pallets, safely decelerating loads using the adjustable 30mm air cushions at both ends.
Replacing the Airtac SI63 Standard Cylinder SI63X50TC with the SAI63X50TC
To replace the SI63X50TC, order the SAI63X50TC. It drops into existing fixtures via the identical ISO 15552 TC trunnion mounting interface, matching the 63mm bore, 50mm stroke, M16x1.5 rod thread and G3/8 port. Because this specific SKU has no -S magnet, it cannot accept CS1-B/DS1-B sensors; if position detection is needed, select an SAI equivalent with a magnet. When sizing, note a 50mm bore offers 982N push at 0.5MPa, while an 80mm bore provides 2513N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X50TC
- ✓ 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 SI63X50TC FAQ
Yes, the SI63X50TC is discontinued. The direct replacement is the SAI63X50TC. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 50mm stroke, G3/8 port, TC trunnion mount and output force.
The 63mm bore uses a G3/8 port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and 2805N push at 0.9MPa. The theoretical maximum force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X50TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X50TC replacement — usually within 7-8 hours.