This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X210, 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 SI63X210
The AirTAC Airtac SI63 Standard Cylinder SI63X210 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 SAI63X210, 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 → SAI63X210
- 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 SI63X210
The AirTAC SI63X210 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. The direct replacement is the SAI63X210, matching the interface, bore, stroke and force exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot take a sensor.
Airtac SI63 Standard Cylinder SI63X210 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X210 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X210 |
| 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 SAI63X210 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 SAI63X210 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 SI63X210
| 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 SI63X210 Is Used
Clamp Actuation
Provides 1559 N of push force at 0.5 MPa to secure medium-duty workpieces during machining operations.
Package Diversion
Drives a 210 mm stroke diverter arm to route boxes on a production line without needing position sensing.
Pallet Stop Gate
Acts as a robust physical stop for pallets, utilizing the adjustable 30 mm air cushions to decelerate loads smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X210 with the SAI63X210
To replace the SI63X210, order the SAI63X210. Verify the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread and 30 mm cushions. This non-magnet SKU cannot accept a CS1-B/DS1-B sensor. If sizing up or down, the 50 mm bore yields 982 N [email protected] MPa, while the 80 mm yields 2513 N. For load holding on air loss, add an external rod lock or pilot check valve, or use the SAIL/BSAI lock variants. At 210 mm stroke, ensure guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X210
- ✓ 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 SI63X210 FAQ
Yes, the SI63X210 is discontinued. The direct replacement is the SAI63X210. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 210 mm stroke, output force, G3/8 port and mounting accessories.
It features a G3/8 air port and M16x1.5 rod thread. Force output is 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 max of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X210
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X210 replacement — usually within 7-8 hours.