Airtac SDAD Double Rod Slim Cylinder SDAD40X55SB
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD40X55SB is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø40mm bore, 55mm 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
- Stroke55 mm
- Port sizePT1/8
- Acting typeDouble acting, double rod
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDAD Double Rod Slim Cylinder SDAD40X55SB
The AirTAC SDAD40X55SB is a compact double-acting cylinder featuring a through-rod that exits both ends of the riveted body. Because the rod occupies both chambers, the annular area is identical on extend and retract, yielding an equal push and pull force of 527.8 N at 0.5 MPa. This symmetric output is highly advantageous for balanced tooling and prevents uneven wear on guiding elements.
This specific configuration includes a built-in piston magnet for position sensing alongside male M14x1.5 rod threads on both ends. The short body geometry drastically reduces axial mounting depth compared to standard round-body options. End-of-stroke deceleration is handled by a fixed NBR bumper, meaning you must leave clearance for the 16 mm rods protruding from both sides.
Airtac SDAD Double Rod Slim Cylinder SDAD40X55SB Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X55SB |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 SDAD40X55SB
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SDAD40X55SB Is Used
Symmetric Gripper Actuation
Drives an opposing gripper jaw where the equal 527.8 N extend and retract forces prevent grip bias during component clamping.
Dual-End Transfer Mechanism
Uses the male M14x1.5 rods on both ends to push a part on the extend stroke while simultaneously retracting a return dog on the opposite side.
Anti-Rotation Machining Jig
The through-rod geometry resists twisting under lateral cutting loads, maintaining jig alignment within the compact 55 mm stroke envelope.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X55SB the Right Cylinder?
When sizing this unit, consider the neighbouring bores: stepping down to the SDAD32 provides 345.6 N at 0.5 MPa, while stepping up to the SDAD50 yields 824.7 N at 0.5 MPa. The through-rod design inherently resists twisting, allowing you to drive a tool on one end and mount a dog on the opposite end.
This model is configured with an S magnet for AirTAC reed or electronic switches and B male M14x1.5 rod threads at both ends. It uses a PT1/8 port and operates at 30-500 mm/s. Remember that a plain cylinder drifts when air is lost or the valve is centered; the fixed NBR bumper only decelerates the stroke end and does not function as a lock. For load holding without live pressure, install an external rod lock or pilot-operated check valve.
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 SDAD40X55SB FAQ
Because the rod exits both ends, the push and pull forces are equal: 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa. The theoretical maximum is 108 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
No, a plain double-acting cylinder drifts when air is lost or the valve centers. The fixed NBR bumper only decelerates the piston near the stroke end and does not act as a brake. For load holding, you must add an external rod lock or a pilot-operated check valve.
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