Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB
The AirTAC Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB is a genuine double-acting COMPACT (JIS) cylinder with a piston rod out BOTH ends — a Ø40mm bore and 40mm stroke. The twin rods resist rotation and give equal push and pull force, so it carries and guides a tool platform without a separate anti-rotation guide.
- BoreØ40 mm
- Stroke40 mm
- Port sizePT1/8
- Acting typeDouble acting, double rod
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionBumper (both ends)
About the Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB
The AirTAC ACQD40X40SB is a double-acting JIS compact cylinder featuring twin rods that exit both ends of the riveted body. Because a rod occupies each chamber, the annular piston area is identical in both directions, yielding equal push and pull force of 527.8N at 0.5MPa and 738.9N at 0.7MPa. The symmetrical layout resists rotation and extends the guide length without needing an external guide rail.
This 40mm bore unit includes a male M14x1.5 rod-end thread for direct coupling, a built-in magnet for solid-state or reed switches, and PT1/8 ports. It relies on fixed NBR elastomer bumpers for end-of-stroke deceleration rather than adjustable air cushions. Note that a standard ACQD does not hold position upon air loss; a pilot-operated check valve or external rod lock is required for fail-safe load holding.
Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB Technical Specifications
| Model | Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB |
|---|---|
| Series | ACQD JIS compact double-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 mm |
| Acting type | Double acting, double rod |
| 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 | Bumper (both ends) |
| Max standard stroke | Up to 100 mm |
Specifications follow the official AirTAC ACQD datasheet. A rod exits both ends, so both directions use the same annular area. Confirm against the product label before installation.
Theoretical Output Force (Ø40mm — equal both ways)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 kgf | |
Because a rod occupies both chambers, push and pull forces are EQUAL — the annular area applies in each direction. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB
| ACQD | JIS compact double-acting DOUBLE-ROD cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard (G / NPT available). The twin rods resist rotation and add guiding length. Related: ACQ (single rod), ACQJ (adjustable stroke), TACQ (guided).
Where the Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB Is Used
Symmetric Transfer Arms
Drives dual-sided pick-and-place arms in packaging lines where equal push and pull thrust ensures balanced acceleration across the entire stroke cycle.
Twin-Guided Pusher
Pushes heavy cartons on a conveyor without twisting, using the inherent anti-rotation properties of the dual rods to maintain precise tool alignment.
Dual-Station Actuation
Uses the second rod end to drive a sensor flag on a secondary station in electronics assembly machinery, saving space and external guide hardware.
Is the Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB the Right Cylinder?
For this 40mm bore, the 527.8N bidirectional force at 0.5MPa sits between the 32mm bore (301.6N) and the 50mm bore (824.6N). Choose the 32mm if your load is lighter, or step up to the 50mm if you need more thrust. If your application only needs unidirectional push force and lacks space for a second rod, a single-rod ACQ cylinder is a simpler alternative. When ordering the ACQD40X40SB, confirm your 40mm stroke is within the 100mm standard limit, specify PT1/8 fittings, and ensure your load matches the M14x1.5 male thread.
Quick checklist
- ✓ Equal force both ways at your pressure
- ✓ Anti-rotation needed (twin rods)?
- ✓ Both rod ends usable for tooling?
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Both rods share the load — keep force concentric.
- check Twin rods resist rotation but avoid heavy side load.
- check Handle the C-clip carefully; seat it fully in its groove.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQD Double Acting Compact Cylinder ACQD40X40SB FAQ
The push and pull forces are equal at 527.8N @0.5MPa and 738.9N @0.7MPa, with a maximum of 108kgf @1.0MPa. This equality occurs because the twin rods create the same annular area in both chambers. The maximum standard stroke for a 40mm bore is 100mm.
It uses fixed NBR elastomer bumpers at both ends for impact absorption, not adjustable air cushions; add an external shock absorber for high-energy loads. A plain ACQD does not hold position on air loss, so you need an external rod lock or pilot check valve for fail-safe holding.
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