Airtac SDAD Double Rod Slim Cylinder SDAD40X75
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD40X75 is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø40mm bore, 75mm stroke). The through-rod resists twisting and lets you drive a tool on one end while a switch or dog reads position on the other — with identical force in both directions.
- BoreØ40 mm
- Stroke75 mm
- Port sizePT1/8
- Acting typeDouble acting, double rod
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper (both ends)
About the Airtac SDAD Double Rod Slim Cylinder SDAD40X75
The AirTAC SDAD40X75 is a compact double-acting cylinder featuring a piston rod exiting both ends of its riveted body. Because the rod occupies each chamber equally, the annular area remains constant, delivering an identical push and pull force of 527.8 N at 0.5 MPa. This symmetry is ideal for driving loads that require balanced resistance in both directions.
The through-rod geometry inherently resists twisting, allowing you to mount a work tool on one end while using the opposite side for a secondary operation. With a 16 mm rod diameter and a PT1/8 port, the short body profile saves axial mounting depth. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion.
Airtac SDAD Double Rod Slim Cylinder SDAD40X75 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X75 |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 mm |
| Acting type | Double acting, rod both ends |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| 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 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 120 mm |
Because a rod occupies both cylinder chambers, the effective area — and therefore the force — is identical in both directions. Specifications follow the official AirTAC SDAD datasheet.
Theoretical Output Force (Ø40mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 kgf |
Force uses the annular (rod-side) area on both strokes, so extend and retract match. Actual usable force is lower than theoretical due to friction. Size with a safety margin.
Model Code: Airtac SDAD Double Rod Slim Cylinder SDAD40X75
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rods (omit = female thread). |
Thread: PT standard. Related SDA-family variants: SDA (single rod), SSA/STA (single acting), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Where the Airtac SDAD Double Rod Slim Cylinder SDAD40X75 Is Used
Symmetric Gauging Fixture
Push and pull forces match at 527.8 N, ensuring a gauge contacts a part with identical pressure in both directions for precise dimensional checks.
Dual-End Transfer Unit
Mount a gripper on one rod end and a dog on the opposite to actuate a mechanical valve, leveraging the anti-rotation through-rod for stable 75 mm transfers.
Compact Strip Ejector
The short riveted body fits within tight press dies, using the 16 mm rods to eject material evenly while saving valuable axial depth.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X75 the Right Cylinder?
When sizing this unit, consider the neighbouring bores: an SDAD32 provides 345.6 N at 0.5 MPa, while an SDAD50 offers 824.7 N. The 40 mm bore hits a practical middle ground, yielding a safe working load of roughly 317 N (about 60 percent of the 0.5 MPa rating) and a vertical lift capacity near 26.9 kg with a 2:1 safety margin.
This specific SKU lacks a piston magnet, so it cannot host reed or electronic switches without upgrading to the -S variant. Rod-end threads are female M8x1.25. Remember that a standard cylinder drifts when air is lost or the valve centres; the fixed bumper only decelerates the stroke end and will not hold the load. Use an external rod lock or pilot-operated check valve for secure positioning.
Quick checklist
- ✓ Need equal force both directions?
- ✓ Anti-rotation / dual-end mounting?
- ✓ Space for a rod that exits both ends
- ✓ Port/thread type (PT)
- ✓ Magnet (S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Leave clearance for the rod exiting both ends.
- check Avoid side load on either rod end.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SDAD Double Rod Slim Cylinder SDAD40X75 FAQ
Because the double-rod design creates equal annular areas, force is identical in both directions: 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and a theoretical maximum of 108 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
Yes, the through-rod extends from both sides, allowing you to drive a tool on one end and mount a dog or secondary fixture on the other. The solid rod resists twisting, though you should ensure adequate clearance for the 75 mm stroke on both sides.
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