Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40
The ACQJ40X250-40 is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 210 mm up to the full 250 mm on the machine without changing parts. The retract stroke remains completely unaffected by this adjustment. As a long-stroke made-to-order variant, it exceeds the 100 mm standard maximum for this bore size.
Because the piston area is unchanged, the force output is identical to a standard ACQ of the same bore. At 0.5 MPa, it provides 628.3 N of push force and 527.8 N of pull force. The unit features a 16 mm piston rod, a PT1/8 port, and fixed elastomer bumpers at both ends for end-of-stroke deceleration. The external adjuster utilizes an M12x1.25 thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 250 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 ACQJ40X250-40
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 ACQJ40X250-40 Is Used
Machining Fixture Stops
Dial in the exact extend position of a 250 mm stroke clamping arm during setup on a CNC machining center, allowing rapid accommodation of different part blanks without swapping hardware.
Product Changeover Diverter
Adjust the extend reach of a routing gate on a packaging conveyor line by up to 40 mm to handle varying carton widths quickly during product family changeovers.
Press Trial Positions
Set trial end positions on an assembly press to test engagement depths of components, tweaking the extend stop on the fly until the optimal permanent position is found.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40 the Right Cylinder?
If you need slightly less push force, the adjacent bore 32 model yields 402.1 N at 0.5 MPa, whereas stepping up to the bore 50 unit provides 981.8 N. If your application never requires end-position adjustments, a standard fixed-stroke ACQ cylinder will suffice. When ordering this variant, confirm the 40 mm bore, 250 mm full stroke, 40 mm adjustment window, female rod-end thread (M8x1.25), and that no magnet (-S) is required.
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 ACQJ40X250-40 FAQ
This cylinder has a 40 mm bore and a 250 mm full stroke. The usable extend range is 210-250 mm due to the 40 mm adjustment window. Force is identical to a standard ACQ: push is 628.3 N and pull is 527.8 N at 0.5 MPa, push is 879.6 N at 0.7 MPa, and max push is 128 kgf at 1.0 MPa.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke length only, meaning the piston area and force remain completely unchanged. The retract stroke is unaffected. The cylinder uses fixed NBR elastomer bumpers at both ends for deceleration rather than an adjustable air cushion.
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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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