Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke70 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75
The AirTAC ACQJ40X70-75 is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend stroke. You can fine-tune the extend end position on the machine without changing parts, achieving a usable extend range of 0-70mm. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, the output force is identical to a standard ACQ of this bore. This 40mm bore unit uses a PT1/8 port and a Ø16mm piston rod with an M8x1.25 female rod-end thread. It includes a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 70 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 ACQJ40X70-75
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 ACQJ40X70-75 Is Used
Machining Fixture Stops
Adjust the extend position to accommodate different part lengths on a CNC machining fixture without fabricating new hard stops.
Assembly Line Changeover
Rapidly reposition the extend end point during product family changeovers on automated assembly lines to minimize downtime.
Packaging Machine Setup
Dial in the exact extension distance for varying carton sizes on a packaging machine to ensure precise folding and sealing.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75 the Right Cylinder?
If you need less push force, the 32mm bore delivers 402.1N at 0.5MPa, while the 50mm bore provides 981.8N for heavier loads. A fixed-stroke ACQ is sufficient if your end position never requires shifting. When ordering this adjustable version, confirm the 40mm bore, 70mm full stroke, 75mm adjust window, female rod thread, and whether a -S magnet is needed for sensors.
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 ACQJ40X70-75 FAQ
Push force is 628.3N and pull is 527.8N at 0.5MPa. At 0.7MPa, push is 879.6N, with a maximum push of 128kgf at 1.0MPa. The usable extend range is 0-70mm, shortened from the 70mm full stroke by the 75mm adjuster window.
An external M12x1.25 threaded stop with a lock nut limits the extend distance, changing only the stroke length and not the piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected. Fixed elastomer bumpers decelerate the load at stroke ends, and this unit ships without a sensor magnet.
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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