Airtac ATQ Single Acting Thin Cylinder ATQ40X25B
The AirTAC Airtac ATQ Single Acting Thin Cylinder ATQ40X25B is a genuine single-acting COMPACT (JIS) cylinder (single acting, pull type) with a Ø40mm bore and 25mm 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
- Stroke25 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 ATQ40X25B
The ATQ40X25B is a JIS compact single-acting PULL cylinder, meaning compressed air fed to its single PT1/8 port retracts the 16mm rod, while an internal spring drives the extension stroke upon exhaust. This fail-safe behavior ensures the rod extends to its resting position if air pressure drops, suiting tensioning and hold-down-release tasks. The -B suffix denotes a male M14x1.5 piston rod end, coupling directly to your load.
At 0.5 MPa, this 40mm bore generates a 527.8N theoretical pull (738.9N at 0.7 MPa) before accounting for the return spring, which lowers the net output force. It features a fixed NBR elastomer bumper at each end to soften end-of-stroke impacts rather than an adjustable air cushion. With a 25mm travel length, it stays within the 30mm maximum stroke limit for this bore size.
Airtac ATQ Single Acting Thin Cylinder ATQ40X25B Technical Specifications
| Model | Airtac ATQ Single Acting Thin Cylinder ATQ40X25B |
|---|---|
| Series | ATQ JIS compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 ATQ40X25B
| ATQ | JIS compact single acting, pull type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 ATQ40X25B Is Used
Wire Tensioning Jig
Uses the spring-extend rest state to maintain constant tension on a wire harness assembly, with air pulling back to release the material.
Package Stopper Gate
Retracts a pneumatic gate via air pressure to let cartons pass on a packaging line, extending back out automatically when air is cut.
Clamp Release Mechanism
Pulls a mechanical gripper closed on a CNC machining fixture, relying on the fail-safe spring extension to open the clamp during an air loss event.
Is the Airtac ATQ Single Acting Thin Cylinder ATQ40X25B the Right Cylinder?
For sizing, dropping down to a 32mm bore yields a 301.6N theoretical pull at 0.5 MPa, while stepping up to a 50mm bore provides 824.6N. If your application requires travel beyond 30mm, you must switch to the double-acting ACQ series for longer strokes. When ordering this specific unit, verify the 40mm bore, 25mm stroke, the male M14x1.5 rod thread (-B), and note it lacks a magnet (-S) for position sensing.
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 ATQ40X25B FAQ
It delivers a 527.8N theoretical pull at 0.5 MPa and 738.9N at 0.7 MPa before the return spring lowers the net output. Operating pressure is 0.2-1.0 MPa, with a 0.2 MPa minimum required to overcome the spring, and the 25mm stroke is under the 30mm maximum for this bore.
Since it is single-acting pull, exhausting the air allows the internal spring to extend the rod to its rest position. End-of-travel impact is controlled by a fixed NBR elastomer bumper, not an adjustable air cushion. This specific model lacks a magnet, so while the body has sensor grooves, it cannot trigger reed or solid-state switches.
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