Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75B 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 ACQJ40X300-75B
The AirTAC ACQJ40X300-75B is a double-acting, single-rod JIS compact cylinder built for long-stroke applications requiring adjustable extend positioning. It features an external M12x1.25 threaded stop with a lock nut that limits the forward stroke, providing a usable extension range of 225 to 300 mm. The return stroke remains completely unaffected. This made-to-order variant stretches the bore 40 standard 100 mm maximum out to 300 mm.
Because the adjuster only alters travel length and not piston area, the output force remains identical to a standard ACQ of this size, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. The unit includes a male M14x1.5 piston rod end (-B) for direct load coupling, PT1/8 ports, and fixed NBR elastomer bumpers at both ends to absorb end-of-stroke impact. The body retains magnetic-switch grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75B |
|---|---|
| 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 ACQJ40X300-75B
| 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 ACQJ40X300-75B Is Used
Machining Fixture Stops
Dial in the exact clamping extension on a CNC machining fixture across multiple part families without machining new stop spacers.
Product Changeover Diverter
Quickly reposition a conveyor sorting gate during packaging line product changeovers using the 225-300 mm usable extend range.
Press Stroke Trial Setup
Test varying end positions on a light assembly press to find the optimal contact depth before finalizing the mechanical stop.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75B the Right Cylinder?
When sizing this actuator, stepping down to a 32 mm bore yields 402.1 N push at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N push. If your application requires a fixed 300 mm extend position without ever needing on-the-fly adjustments, a standard ACQ40X300 cylinder would suffice and save space. To order correctly, confirm the 40 mm bore, 300 mm full stroke, 75 mm adjustment window, male rod thread, and whether you need the -S magnet option for sensor switches.
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 ACQJ40X300-75B FAQ
The usable extend range is 225 to 300 mm. It generates 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. Force is identical to a standard ACQ bore 40 because the adjuster only changes stroke length.
An external M12x1.25 threaded stop with a lock nut mechanically limits the forward travel, allowing on-machine tuning without replacing parts. The retract stroke is unaffected. This specific model ships without a sensor magnet, though the body retains grooves for adding reed or solid-state switches if needed.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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