This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X210S, 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 SI63X210S
The AirTAC SI63 Standard Cylinder SI63X210S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 210mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X210S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke210 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X210S
- 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 SI63X210S
The AirTAC SI63X210S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 210 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X210S, a direct sharing the exact interface, stroke, force, and mounting. Note that 210 mm is a nonstandard stroke length.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity, while retaining the carbon/SUS420J2/SUS304 rod options and Viton H high-temp seals. For position sensing, this -S model uses legacy CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X210S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X210S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X210S |
| Bore size | Ø63 mm |
| Stroke | 210 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 SAI63X210S 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 SAI63X210S 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 SI63X210S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×210 | 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 SI63X210S Is Used
Mid-Tonnage Pressing
Applies the 1559 N push force at 0.5 MPa for seating bearings and assembling pins in automated machinery.
Package Diversion
Actuates routing gates and stops along material handling lines using the 210 mm stroke and 30-800 mm/s speed.
Vertical Lifting
Hoists components up to the 79 kg vertical limit, requiring external pilot check valves to prevent drift.
Replacing the Airtac SI63 Standard Cylinder SI63X210S with the SAI63X210S
To replace the SI63X210S, order the SAI63X210S. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the M16x1.5 rod thread. Because 210 mm is nonstandard, verify exact extended length. Sizing both ways: a 50 mm bore gives 982 N push, while an 80 mm bore gives 2513 N. For loads needing holding on air loss, a plain cylinder drifts; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. For 210 mm strokes, ensure guide rails to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X210S
- ✓ 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 SI63X210S FAQ
Yes, the SI63X210S is discontinued. The direct replacement is the SAI63X210S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 210 mm stroke, G3/8 port, and mounting interface.
This double-acting cylinder features a G3/8 port. Force output is 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and 2805 N at 0.9 MPa. The theoretical max is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X210S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X210S replacement — usually within 7-8 hours.