This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX240, 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 SI63BX240
The AirTAC Airtac SI63 Standard Cylinder SI63BX240 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX240, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX240
- 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 SI63BX240
The AirTAC SI63BX240 is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore and 240mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa, with a G3/8 air port and a SUS304 stainless steel rod for corrosion resistance. The direct replacement is the SAI63BX240, matching the exact ISO 15552 mounting interface, force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this specific SKU lacks a magnet (-S), it cannot accept position switches like the legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63BX240 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX240 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX240 |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAI63BX240 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 SAI63BX240 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 SI63BX240
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SI63BX240 Is Used
Stainless Rod Diverter
Ideal for diverting items on a washdown conveyor line where the SUS304 rod resists moisture and the 1559N force easily pushes heavy cartons.
Mid-Stroke Clamping Jig
Provides reliable 240mm travel for reaching into a machining cell to clamp parts, utilizing adjustable end cushions to decelerate the tooling smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63BX240 with the SAI63BX240
To replace the SI63BX240, order the SAI63BX240. It drops directly into existing ISO 15552 fixtures with identical 63mm bore, 240mm stroke, G3/8 port, and M16x1.5 rod thread. Confirm your mounting accessory (LB, FA, TC, etc.) and note that this non-magnetic version cannot take sensors. If you need more force, the neighbouring 80mm bore yields 2513N push at 0.5MPa; if less is required, the 50mm bore gives 982N. Since the stroke is 240mm, ensure adequate guidance to prevent rod-bending side loads. For load holding on air loss, note the air cushion only decelerates; you must add an external rod lock, pilot check valve, or use the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX240
- ✓ 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 SI63BX240 FAQ
Yes, the SI63BX240 is discontinued. The direct replacement is the AirTAC SAI63BX240. It features the same ISO 15552 mounting interface, 63mm bore, 240mm stroke, G3/8 port, and output force, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
The 63mm bore provides 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. Operating speed is 30-800mm/s. It uses a G3/8 port and features a 30mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX240
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