Airtac SAID40 Double Rod Cylinder SAID40BX135
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX135 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX135
The AirTAC SAID40X135 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and a 135mm made-to-order stroke. Because a piston rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528N of force in each direction at 0.5 MPa. This twin-rod layout provides superior anti-rotation guidance and lets you drive a primary workpiece on one end while mounting a cam or position flag on the rear rod.
Built for demanding environments, this variant uses SUS304 stainless steel for both rods to maximize corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. Adjustable air cushioning at both ends ensures smooth deceleration, and the PT tapered port thread guarantees a reliable, leak-free pneumatic connection.
Airtac SAID40 Double Rod Cylinder SAID40BX135 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX135 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAID40BX135
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SAID40BX135 Is Used
Symmetric Force Transfer
Drives a transfer mechanism where the 528N push and pull forces must be perfectly balanced, preventing speed variations between extending and retracting strokes.
Anti-Rotation Slides
Guides a heavy sliding carriage with high torsional stability, using the twin SUS304 rods to prevent binding and unwanted rotation during vertical movement.
Dual-Side Actuation
Actuates a primary clamping jaw on the front rod while using the rear rod end to trigger a DMSE electronic sensor flag for precise end-of-stroke timing.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX135 the Right Cylinder?
Select this 40mm bore double-rod cylinder when an application requires equal push and pull forces (528N at 0.5 MPa) alongside dual-side actuation. If your mechanism needs higher thrust, stepping up to the 50mm bore yields 825N both ways; dropping down to the 32mm bore provides 345N. The 135mm stroke is non-standard and made-to-order, so confirm production lead times for your assembly timeline. Because the rod protrudes from the rear cover, ensure you have adequate clearance to prevent mechanical interference during full travel.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders, offering a direct drop-in replacement without altering your machine footprint. It supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR accessories. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold a load. If your system loses air pressure, the piston will drift, requiring an external rod lock or a SAIL/BSAID locking cylinder for position holding.
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 SAID40BX135 FAQ
Because the double-rod design subtracts the rod area from both sides, the push and pull forces are equal. It provides 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa in both directions.
Yes, it is dimensionally interchangeable per ISO 15552. It uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, but it does not support FB, CA, CB, or CR mounts.
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