Airtac SAID40 Double Rod Cylinder SAID40BX475
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX475 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX475
The AirTAC SAID40X475 is a double-acting, double-rod ISO 15552 profile cylinder. A single piston carries a rod out of both end covers, meaning the annulus area is identical on extend and retract. This provides an equal 528 N of force both ways at 0.5 MPa, ensuring symmetric push and pull dynamics.
Equipped with a SUS304 stainless steel rod (option B), it excels in environments where corrosion resistance is paramount. The extruded aluminum barrel features sensor grooves on both sides for CMSE reed and DMSE electronic switches. Because the rear rod protrudes from the back cover, you must account for additional clearance to mount a cam or position flag.
Airtac SAID40 Double Rod Cylinder SAID40BX475 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX475 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 475 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 SAID40BX475
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×475 | 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 SAID40BX475 Is Used
Symmetric Force Transfer
Drives a transfer carriage where the 528 N push and pull forces must remain perfectly equal to prevent motor stall on the return stroke.
Anti-Rotation Slides
Uses the twin rods exiting both covers to keep a heavy vertical slide guided and prevented from twisting during vertical lift.
Through-Rod Sensing
Mounts a position flag on the rear rod end to trigger external DMSE solid-state sensors without interfering with the primary workpiece on the front side.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX475 the Right Cylinder?
Choose this 40 mm bore when an application demands matched push and pull forces alongside anti-rotation guidance, which a single-rod SAI cannot provide. If your mechanism requires less force, the 32 mm bore offers 345 N each way at 0.5 MPa, whereas stepping up to the 50 mm bore yields 825 N.
At 475 mm of stroke, the unsupported piston rod is highly susceptible to side-load bending and rod-bearing wear. Always use an external guide rail to support the load and prevent premature seal failure. Remember that the adjustable air cushions only decelerate the piston near stroke end; they do not hold the load. If air pressure drops, the cylinder drifts, so specify a SAIL or BSAID lock variant for fail-safe position holding. This unit is dimensionally interchangeable per ISO 15552, using a PT tapered G1/4 port and the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAID40BX475 FAQ
Because a rod occupies both sides of the piston, the effective area is identical in both directions. It delivers 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extend and retract strokes.
Yes, it is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 double-rod cylinders, matching the 40 mm bore, 475 mm stroke, and G1/4 port.
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