Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-40B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-40B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke75 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-40B
The AirTAC ACQJ40X75-40B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend stroke anywhere from 35 mm up to the full 75 mm directly on the machine, shortening travel by up to 40 mm without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. This male-thread rod variant (M14x1.5) couples directly to your load. The unit uses a fixed NBR elastomer bumper at each end for end-of-travel deceleration rather than an adjustable air cushion, and the body includes standard magnetic-switch grooves, though this specific SKU ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-40B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-40B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 75 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 ACQJ40X75-40B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 ACQJ40X75-40B Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC milling fixture during setup, allowing operators to shorten the extend stroke by up to 40 mm for varying part heights without machining new spacers.
Package Changeover Diverter
Adjust the stroke of a sorting gate on a packaging line on-the-fly when switching between different carton widths, ensuring precise product routing without mechanical teardown.
Press Trial Positions
Set temporary lower extend end-positions on an assembly press during new product trials, safely testing tooling clearance before locking the adjuster nut for production runs.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-40B the Right Cylinder?
When sizing this 40 mm bore actuator, note it delivers 879.6 N of push force at 0.7 MPa. If your application requires less force, stepping down to a 32 mm bore provides 402.1 N push at 0.5 MPa, while moving up to a 50 mm bore yields 981.8 N push at 0.5 MPa. If your end-position never needs variation, a fixed-stroke ACQ cylinder is sufficient and more compact. To order correctly, confirm the 40 mm bore, 75 mm full stroke, 40 mm adjustable window, the male M14x1.5 rod thread, and that no magnet (-S) is required for your setup.
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 ACQJ40X75-40B FAQ
This 40 mm bore cylinder provides 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 full stroke is 75 mm with a 40 mm adjustment window, giving a usable extend range of 35-75 mm. It features a PT1/8 port, a male M14x1.5 rod thread, and an M12x1.25 external adjuster thread.
No, the external stop only changes the extend stroke length; the piston area remains the same, so force is identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers for deceleration, not an adjustable air cushion. Note that a plain compact cylinder does not hold its load on air loss—if you need a fail-safe hold, install an external rod lock or pilot-operated check valve.
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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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