This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X270, 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 SI63X270
The AirTAC Airtac SI63 Standard Cylinder SI63X270 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X270, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X270
- 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 SI63X270
The AirTAC SI63X270 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 270mm stroke, delivering 1559N push force at 0.5MPa through a G3/8 port. Because this legacy SI unit is end-of-life, AirTAC specifies the SAI63X270 as the direct replacement. It retains the identical ISO 15552 mounting interface, bore, stroke, force, port and mounting accessories, fitting existing fixtures perfectly.
The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for extended lifespan and lower start-up pressure. Note this specific SI63X270 SKU lacks the -S magnet and cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X270 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X270 |
| Bore size | Ø63 mm |
| Stroke | 270 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 SAI63X270 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 SAI63X270 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 SI63X270
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×270 | 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 SI63X270 Is Used
Clamping Fixtures
Secures mid-weight machined parts with 1559N push force at 0.5MPa, ensuring rigid holding during milling or drilling operations.
Package Diversion
Actuates sorting arms or pushers along material handling lines, utilizing the 270mm stroke to clear items off the main belt path.
Pallet Stops
Functions as a robust pneumatic stop gate for heavy pallets, absorbing impact via adjustable 30mm air cushions at both ends.
Replacing the Airtac SI63 Standard Cylinder SI63X270 with the SAI63X270
To replace the discontinued SI63X270, order the SAI63X270 direct: verify the ISO 15552 mounting interface, 63mm bore, 270mm stroke, G3/8 port (PT/G/NPT thread), and mounting accessory (LB, FA, TC, etc.). Since this SKU lacks the -S magnet, it cannot support position sensing; if detection is needed, select an SAI63X270S and use current AirTAC switches. For sizing alternatives, a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore provides 2513N. A plain cylinder drifts on air loss because the cushion only decelerates; for load holding, use the SAIL or BSAI lock variants, or an external pilot check valve. At 270mm stroke, ensure guide alignment to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X270
- ✓ 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 SI63X270 FAQ
Yes, the SI63X270 is discontinued. The direct replacement is the AirTAC SAI63X270. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 270mm stroke, output force, G3/8 port, and mounting interface for a seamless fixture swap.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Request a Quote for the SAI63X270
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X270 replacement — usually within 7-8 hours.