Airtac SAI50 Standard Cylinder SAI50BX400
The AirTAC SAI50 Standard Cylinder SAI50BX400 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 400mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ50 mm
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 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 SAI50 Standard Cylinder SAI50BX400
The AirTAC SAI50X400 is a double-acting ISO 15552 profile cylinder engineered to deliver a push force of 982 N at 0.5 MPa across a 400 mm stroke. Its extruded aluminum barrel omits tie rods, presenting a clean exterior that drops directly into standardized ISO 15552 mounting interfaces. This specific 50 mm bore size is frequently chosen for mid-range automation tasks requiring substantial travel without consuming the footprint of larger bores.
Reflecting the exact configuration for this unit, the piston rod is constructed from SUS304 stainless steel (option B) for superior corrosion resistance in washdown or chemically active settings. Porting follows the PT tapered thread standard. Because standard sensors require a magnetic piston, note this specific SKU omits the -S magnet option; external reed or solid-state switches from the CMSE or DMSE series cannot be utilized without it.
Airtac SAI50 Standard Cylinder SAI50BX400 Technical Specifications
| Model | Airtac SAI50 Standard Cylinder SAI50BX400 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI50 Standard Cylinder SAI50BX400
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SAI50 Standard Cylinder SAI50BX400 Is Used
Long-Reach Diverting
Pushes packages across a 400 mm span on sorting lines where the 982 N thrust easily overcomes carton friction.
Component Unstacking
Extracts blanks from deep magazine feeders, utilizing the full stroke length to reach the bottom of the hopper.
Door Actuation
Opens large machine safety doors, relying on the SUS304 rod to resist environmental moisture over the extended travel.
Is the Airtac SAI50 Standard Cylinder SAI50BX400 the Right Cylinder?
Selecting this 50 mm bore is optimal when a 40 mm bore (yielding 628 N at 0.5 MPa) lacks the necessary thrust, yet a 63 mm bore (providing 1559 N) would be physically oversized for the machine envelope. The 400 mm stroke provides extensive reach for material handling, though strokes of 300 mm or greater introduce mechanical bending risks on the rod bearing under side loads. To manage this, implement an external guide rail or transition to a guided cylinder design to prevent premature seal wear.
This actuator serves as a dimensionally interchangeable replacement for other ISO 15552 profile cylinders, ensuring seamless integration with existing FA/FB flanges or TC trunnion accessories. If the application requires the load to be physically held in place during a loss of supply pressure, the standard SAI cannot fulfill this; its adjustable air cushions only decelerate the piston near the stroke ends. For positive holding, specify the SAIL (air-released lock) variant or an external pilot-operated check valve.
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 SAI50 Standard Cylinder SAI50BX400 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. If operating at 0.7 MPa, the push force increases to 1374 N.
Yes, the SAI50X400 is a profile cylinder built to ISO 15552 dimensions, making it dimensionally interchangeable with other actuators sharing the same 50 mm bore standard.
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