Airtac SAID40 Double Rod Cylinder SAID40BX550
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX550 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 550mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke550 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX550
The AirTAC SAID40X550 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 550mm stroke. Because a rod extends from both end covers, the annulus area is identical on both sides, yielding exactly 528 N of output force in both extend and retract directions at 0.5 MPa. This symmetric force capability makes it ideal for operations requiring consistent push and pull dynamics.
This specific configuration features SUS304 stainless steel rods (material code B) for superior corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches, though this unit is supplied without a magnet. A rear rod protrudes from the back cover, requiring additional clearance to accommodate the through-rod design.
Airtac SAID40 Double Rod Cylinder SAID40BX550 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX550 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40BX550
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×550 | 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 SAID40 Double Rod Cylinder SAID40BX550 Is Used
Symmetric Force Transfer
Drives a shuttle mechanism where the exact 528 N force is required identically in both forward and reverse motions, preventing speed variations.
Anti-Rotation Slides
Utilizes the twin-rod architecture to keep a heavy sliding carriage guided and prevented from twisting along its 550mm travel path.
Rear-Rod Cam Actuation
Mounts the primary workpiece on the front rod while using the rear protruding rod end to trigger a mechanical limit valve or secondary mechanism.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX550 the Right Cylinder?
Select this 40mm bore double-rod cylinder when an application demands equal push and pull forces (528 N at 0.5 MPa) alongside anti-rotation guidance. If your project requires higher thrust, stepping up to the 50mm bore yields 825 N at 0.5 MPa; if less force is acceptable, the 32mm bore provides 345 N. Choose the SAID over a single-rod SAI when you need to mount a secondary tool, cam, or position flag on the rear rod end.
With a 550mm stroke, the unsupported rod length increases susceptibility to bending and side loads. Implementing an external guide rail is strongly recommended to prevent premature rod-bearing wear. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; this cylinder cannot hold a load if air pressure is lost. For position holding, consider an SAIL lock cylinder or an external pilot-operated check valve. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAID40 Double Rod Cylinder SAID40BX550 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the force is equal in both directions. It provides 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X550 is dimensionally interchangeable per ISO 15552 mounting interface dimensions, making it a drop-in replacement for other ISO 15552 double-rod cylinders. It uses PT ports and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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