This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X502SN, 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 SI63X502SN
The AirTAC Airtac SI63 Standard Cylinder SI63X502SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 502mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X502SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke502 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X502SN
- 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 SI63X502SN
The AirTAC SI63X502SN is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 502mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X502SN, retaining the exact interface, stroke, force and mounting. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. It also adds SAIL, SAIF and BSAI variants the SI lacked.
This -S/-N configuration includes a piston magnet for CS1-B/DS1-B switches and NBR seals (-20 to +70 C; Viton H raises this to 150 C). Carbon steel, SUS420J2 (A) or SUS304 (B) rods are available.
Airtac SI63 Standard Cylinder SI63X502SN Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X502SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X502SN |
| Bore size | Ø63 mm |
| Stroke | 502 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 SAI63X502SN 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 SAI63X502SN 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 SI63X502SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×502 | 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 SI63X502SN Is Used
Material Diversion
Actuates routing gates on package lines, using the 1559 N push force to deflect heavy totes reliably at high cycling speeds.
Clamp Actuation
Drives machining clamps with 1402 N pull force at 0.5 MPa, though a SAIL lock variant is needed if holding during air loss.
Replacing the Airtac SI63 Standard Cylinder SI63X502SN with the SAI63X502SN
To replace the SI63X502SN, order the SAI63X502SN. Verify the ISO 15552 mounting interface, 63mm bore, 502mm stroke, G3/8 port (PT/G/NPT thread options) and mounting accessory (LB, FA, CA, TC, etc.). The -S magnet enables CS1-B/DS1-B sensors (the SAI uses current AirTAC switches), and -N specifies NBR seals. Sizing both ways: a 50mm bore yields 982 N push @0.5 MPa, while an 80mm bore yields 2513 N. For this 502mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X502SN
- ✓ 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 SI63X502SN FAQ
Yes, the SI63X502SN is discontinued. The direct replacement is the SAI63X502SN. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 502mm stroke, G3/8 port, output force and mounting fixtures.
The 63mm bore features a G3/8 port and M16x1.5 rod thread. Forces are: 1559 N push / 1402 N pull @0.5 MPa; 2182 N push @0.7 MPa; 2805 N push @0.9 MPa; with a theoretical max of 318 kgf @1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X502SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X502SN replacement — usually within 7-8 hours.