Airtac ATQ Single Acting Thin Cylinder ATQ40X20
The AirTAC Airtac ATQ Single Acting Thin Cylinder ATQ40X20 is a genuine single-acting COMPACT (JIS) cylinder (single acting, pull type) with a Ø40mm bore and 20mm stroke. Air pulles the rod and an internal spring performs the opposite stroke, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ40 mm
- Stroke20 mm
- Port sizePT1/8
- Acting typeSingle acting, pull type
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionBumper
About the Airtac ATQ Single Acting Thin Cylinder ATQ40X20
The AirTAC ATQ40X20 is a single-acting PULL-type compact cylinder where pneumatic pressure retracts the 16mm rod, while an internal spring drives the extension stroke. Supplying air to the single PT1/8 port draws the load inward; venting that air allows the spring to push it back out. This fail-safe behavior ensures the rod automatically extends to its rest position if air pressure drops, suiting hold-down-release and tensioning workflows.
At 0.5 MPa, this 40mm bore generates a 527.8N theoretical pull force (738.9N at 0.7 MPa) before accounting for the return spring. Because the internal spring constantly opposes the air-driven retraction, the actual net output is lower than these raw figures—always verify the exact net force from the official datasheet. The body features fixed NBR elastomer bumpers at both ends to soften end-of-stroke impacts rather than relying on adjustable air cushions.
Airtac ATQ Single Acting Thin Cylinder ATQ40X20 Technical Specifications
| Model | Airtac ATQ Single Acting Thin Cylinder ATQ40X20 |
|---|---|
| Series | ATQ JIS compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Single acting, pull type |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC ACQ-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Theoretical Output Force (Ø40mm, Pull)
| Pressure | Pull force (before spring) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
These are theoretical air-side forces; the return-spring force reduces the NET usable output. Single-acting pull only — the spring performs the opposite stroke. Confirm the net figure from the datasheet and size with a safety margin.
Model Code: Airtac ATQ Single Acting Thin Cylinder ATQ40X20
| ATQ | JIS compact single acting, pull type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm (single-acting max 30 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). ASQ pushes out / spring returns; ATQ pulls in / spring extends. Related: ACQ (double acting), ACQD (double rod), ACQJ (adjustable stroke).
Where the Airtac ATQ Single Acting Thin Cylinder ATQ40X20 Is Used
Clamp Release Mechanism
Air retracts the rod to hold a workpiece securely during machining; exhausting the port lets the spring extend the rod, automatically releasing the clamp during an air loss event.
Diverter Gate Retraction
Pulls a routing gate out of the conveyor flow on command. The spring-extend design guarantees the gate returns to its blocking position if the pneumatic supply fails.
Tensioning Arm Control
Draws a tensioning pulley inward to slacken a belt for maintenance, relying on the compact 20mm stroke and robust 16mm rod to handle cyclic pulling loads.
Is the Airtac ATQ Single Acting Thin Cylinder ATQ40X20 the Right Cylinder?
Choosing this 40mm bore makes sense when your application demands a theoretical 527.8N pull at 0.5 MPa (738.9N at 0.7 MPa) before spring deduction. If you need less force, the adjacent 32mm bore provides a 301.6N theoretical pull at 0.5 MPa; stepping up to the 50mm bore yields 824.6N at 0.5 MPa. This specific configuration carries a 20mm stroke, well within the 30mm maximum limit for single-acting pull at this bore size. For longer travel distances, you must switch to the double-acting ACQ series. When ordering, confirm the 40mm bore, 20mm stroke, standard PT1/8 port, and the default female M8x1.25 rod-end thread. Note this variant ships without a magnet (-S), though the body retains sensor grooves for adding your own switches.
Quick checklist
- ✓ Net pull force (after spring) at your pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ 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 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Handle the C-clip carefully; seat it fully in its groove.
- check Installation by qualified personnel per AirTAC docs.
Airtac ATQ Single Acting Thin Cylinder ATQ40X20 FAQ
This cylinder provides a theoretical pull of 527.8N at 0.5 MPa and 738.9N at 0.7 MPa. These figures represent the air-side force before the return spring; the internal spring lowers the net output, so confirm exact net values from the datasheet. It operates on a single air line at 0.2-1.0 MPa, with 0.2 MPa being the minimum required to overcome the spring. The maximum standard stroke for this 40mm bore is 30mm.
Because it is a single-acting pull type, exhausting the air port causes the internal spring to extend the rod to its resting state automatically. This fail-safe extend behavior is ideal for tensioning or hold-down-release logic. End-of-stroke deceleration is handled by fixed NBR elastomer bumpers rather than adjustable air cushions. This specific SKU lacks the -S magnet, but the body retains magnetic-switch grooves for adding your own reed or solid-state sensors if needed.
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