Airtac SAI63 Standard Cylinder SAI63BX250S
The AirTAC Airtac SAI63 Standard Cylinder SAI63BX250S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ63 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
- 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 SAI63 Standard Cylinder SAI63BX250S
The AirTAC SAI63X250-S is a double-acting ISO 15552 profile cylinder engineered for automated machinery requiring reliable linear motion. Delivering a push force of 1559 N at 0.5 MPa, this 63mm bore unit manages a 250mm stroke with adjustable air cushions at both ends to dampen impact. The extruded aluminum barrel eliminates tie-rods, providing a clean exterior that simplifies mounting and sensor placement.
This specific configuration includes a -S magnet for direct compatibility with CMSE and DMSE reed switches, fitting neatly into the dual sensor grooves machined along the barrel. It is built with a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in humid or washdown environments, and utilizes PT tapered port threads for a secure, sealed pneumatic connection.
Airtac SAI63 Standard Cylinder SAI63BX250S Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63BX250S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / 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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI63 Standard Cylinder SAI63BX250S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAI63 Standard Cylinder SAI63BX250S Is Used
Automated Clamping
Provides 1559 N of clamping force at 0.5 MPa to secure medium-weight metal or composite parts during CNC machining and milling processes.
Material Diverting
Actuates routing gates and pusher arms on packaging lines, utilizing the 250mm stroke to redirect products between parallel conveyors.
Press Assembly
Drives lightweight bearing housings or pins into alignment fixtures, leveraging adjustable end cushions to prevent impact damage at stroke endpoints.
Is the Airtac SAI63 Standard Cylinder SAI63BX250S the Right Cylinder?
Choose this 63mm bore when a 50mm bore falls short—its 982 N push force at 0.5 MPa is often insufficient for heavier actuation—yet an 80mm bore (2513 N at 0.5 MPa) would be physically oversized. The 250mm stroke is well within the 1500mm standard limit, but any stroke exceeding 300mm typically warrants external guide rails to prevent rod-bearing bending under side loads. If your machinery cannot maintain live air pressure during an emergency stop or power loss, the standard SAI cannot hold a vertical load; instead, specify the SAIL variant with an air-released lock or a BSAI bidirectional clamp-lock. For ISO 15552 direct replacements, match the 63mm bore, 250mm stroke, G3/8 port, and appropriate mounting accessories like the TC trunnion or LB foot bracket.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAI63 Standard Cylinder SAI63BX250S FAQ
At a 0.5 MPa operating pressure, this 63mm bore cylinder generates a push force of 1559 N and a pull force of 1402 N. If operating at 0.7 MPa, the push force increases to 2182 N.
Yes, the SAI series is dimensionally interchangeable per ISO 15552 standards. You can use it as a direct replacement for other ISO 15552 profile cylinders by matching the 63mm bore, 250mm stroke, and G3/8 port size.
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