Airtac SAID40 Double Rod Cylinder SAID40X55
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X55 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X55
The AirTAC SAID40X55 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and a 55mm non-standard stroke. Because a piston rod extends from both end covers, the effective annulus area is identical on the extend and retract sides. This means you get exactly 528N of output force in both directions at 0.5MPa, ensuring perfectly symmetric speed and thrust for precision motion tasks.
This through-rod design allows you to mount the primary workpiece on one end while utilizing the rear rod end for a position flag, cam, or secondary mechanism. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches (requires a magnet). With a standard carbon steel rod and PT tapered port threads, it offers robust, interchangeable ISO 15552 dimensional performance.
Airtac SAID40 Double Rod Cylinder SAID40X55 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X55 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAID40X55
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SAID40X55 Is Used
Symmetric Force Transfer
Ideal for shuttling parts between two stations where the 528N both-way force ensures identical push and pull dynamics without needing pressure adjustments.
Anti-Rotation Slides
The twin through-rods provide superior torsional rigidity, keeping guided loads perfectly aligned and preventing rotation during travel.
Rear-Rod Cam Actuation
Mount the primary tool on the front rod while using the rear protruding rod end to trigger external limit switches or mechanical cams.
Is the Airtac SAID40 Double Rod Cylinder SAID40X55 the Right Cylinder?
Choose this 40mm bore when your application strictly requires equal push and pull forces, as the twin rods subtract the rod area from both sides, yielding a uniform 528N both ways at 0.5MPa. If you need less force, stepping down to a 32mm bore provides 345N, while a 50mm bore yields 825N. The 55mm stroke is a non-standard made-to-order length, ensuring exact fitment for custom machinery envelopes.
A double-rod cylinder is preferred over a single-rod SAI when you need enhanced anti-rotation guidance, dual-side actuation, or rear-rod position sensing. Note that the adjustable air cushions only decelerate the piston near stroke end and do not hold the load if air pressure is lost; for dead-end holding, consider a SAIL lock or BSAID clamp-lock cylinder. Mounting options include the SAID-specific set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on single-rod variants.
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 SAID40X55 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the force is equal in both directions. It delivers 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa.
Yes, it is dimensionally interchangeable with ISO 15552 profile cylinders. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits the FB, CA, CB, and CR brackets used on single-rod versions.
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