Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30B
The AirTAC ACQJ40X125-30B is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. With a full stroke of 125 mm and a 30 mm adjustment window, the usable extend range spans 95 to 125 mm. The retract stroke remains completely unaffected. This long-stroke variant exceeds the standard 100 mm maximum for bore 40, making it a made-to-order solution for extended reach requirements.
Because the piston area is unchanged, the force output is identical to a standard ACQ of the same bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. The unit includes a male M14x1.5 piston rod end for direct load coupling, a PT1/8 port, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration. Note that this model ships without a piston magnet, though the body retains sensor grooves for optional switch track mounting.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 125 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 ACQJ40X125-30B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 ACQJ40X125-30B Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining center during setup, allowing operators to shorten the extend stroke by up to 30 mm to accommodate different part geometries without swapping cylinders.
Carton Forming Adjustments
Accommodate varying package sizes on a packaging line by fine-tuning the extend end position on the fly, ensuring precise folding pressure for different carton heights.
Assembly Press Positioning
Set trial end positions for pressing sub-components in an automated assembly cell, using the external stop to test engagement depths before finalizing the mechanical setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-30B the Right Cylinder?
Choosing this 40 mm bore cylinder involves sizing between the 32 mm option (402.1 N push @0.5 MPa) and the 50 mm option (981.8 N push @0.5 MPa). If your application strictly requires a fixed 125 mm stroke without end-position tuning, a standard ACQ40X125 would suffice. When ordering, confirm the 40 mm bore, 125 mm full stroke, 30 mm adjustment window, the male M14x1.5 rod thread, and the absence of the -S magnet option.
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 ACQJ40X125-30B FAQ
The usable extend range is 95-125 mm (a 125 mm full stroke minus up to a 30 mm window). The force is identical to a standard ACQ: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa.
The external M12x1.25 threaded stop with a lock nut limits only the extend stroke length, leaving the retract stroke unaffected. It does not alter force or the fixed elastomer bumpers. For load holding during air loss, a plain ACQ-type cylinder will drift, so an external rod lock or pilot-operated check valve is required for fail-safe positioning.
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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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