Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-10
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-10 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 ACQJ40X300-10
This double-acting single-rod actuator is a long-stroke, made-to-order variant exceeding the standard 100mm maximum for its bore size. It features an external M12x1.25 threaded stop with a lock nut on the extend side, allowing you to dial in the end position directly on the machine without swapping parts. The usable extend range spans 290-300mm, while the retract stroke remains completely unaffected.
Because the piston area stays constant, output force equals a standard ACQ of this size. At 0.5MPa it delivers 628.3N of push and 527.8N of pull force. The body includes fixed elastomer NBR bumpers at both ends for basic end-of-stroke deceleration rather than adjustable air cushions, and it retains sensor grooves for adding reed or solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-10 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-10 |
|---|---|
| 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 ACQJ40X300-10
| 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 ACQJ40X300-10 Is Used
Long-Reach Machining Fixtures
Dial in the exact 290-300mm extend position on a CNC machining center during prototype runs without machining new spacer blocks.
Packaging Line Changeovers
Adjust the external stop to accommodate different carton sizes on a packaging conveyor, achieving rapid product changeover.
Assembly Press Trial Positions
Safely test multiple extend endpoints on an assembly press to find the optimal pressing depth before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-10 the Right Cylinder?
When sizing this unit, consider the neighbouring bores: a 32mm bore yields 402.1N push at 0.5MPa, whereas a 50mm bore provides 981.8N. This 40mm unit hits 628.3N push, making it suitable for mid-range loads. If your application never requires end-position tweaking, a fixed-stroke ACQ cylinder will suffice and likely ship faster. To order this adjustable version, confirm the 40mm bore, 300mm full stroke, 10mm window, female M8x1.25 rod thread, and note that this specific 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 ACQJ40X300-10 FAQ
This cylinder provides 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The 10mm adjustment window allows a usable extend range of 290-300mm.
No, the adjuster only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer NBR bumpers at both ends for deceleration instead of adjustable air cushions, so for high-speed loads you should add an external shock absorber.
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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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