Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B
The ACQJ40X300-40B is a double-acting JIS compact cylinder featuring a 300mm stroke and a male-thread piston rod (M14x1.5) for direct load coupling. An external mechanical stop with a lock nut lets you fine-tune the extend end position on the machine itself. You get a usable extend range of 260-300mm, shortening the forward travel by up to 40mm without swapping parts. The retract stroke remains completely unaffected.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore. At 0.5 MPa it delivers 628.3N of push and 527.8N of pull. This 300mm variant is a made-to-order long-stroke unit, exceeding the 100mm standard maximum for this 40mm bore. It retains the fixed NBR elastomer bumper at each end and operates on PT1/8 porting.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 |
| Rod thread | M8×1.25 (F) / M14×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B Is Used
Variable Length Stop
Dialing in the exact extend reach on a packaging machine pusher during a product format changeover.
Prototype Positioning
Testing multiple extend end positions on a machining fixture without machining new spacer blocks.
Adjustable Divert
Fine-tuning the actuation point of a sorting gate on a conveyor line to handle varying package sizes.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B the Right Cylinder?
Selecting this model requires confirming the 40mm bore, 300mm full stroke, and the 40mm adjuster window. If your equipment only needs a fixed forward reach, a standard ACQ cylinder will suffice without the external stop hardware. For sizing context, dropping to a 32mm bore reduces push force to 402.1N at 0.5 MPa, while stepping up to a 50mm bore increases it to 981.8N. Remember to specify the -B male rod end, PT porting, and note that this configuration ships without a magnet.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ 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 Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40B FAQ
This cylinder provides 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The usable extend range is 260-300mm, meaning the 300mm full stroke can be shortened by up to the 40mm window.
The M12x1.25 threaded stop with lock nut physically limits how far the rod extends, changing only the stroke length and not the piston area, so force remains unchanged. The cylinder uses fixed elastomer bumpers for end-of-stroke deceleration. It will not hold a load on air loss; use an external rod lock or pilot-operated check valve for fail-safe positioning.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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