Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75B 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 ACQJ40X70-75B
The AirTAC ACQJ40X70-75B is a double-acting JIS compact cylinder with an external extend stop. A threaded rod with a lock nut limits how far the piston extends, giving a usable forward range of 0-70mm from the 70mm full stroke. The return stroke remains at its standard length. Because the adjuster only alters travel distance, the piston area stays the same, meaning force is identical to a standard ACQ40.
This unit features a 16mm piston rod with a male M14x1.5 thread for direct load coupling. It uses PT1/8 ports and an M12x1.25 external adjuster thread. The body includes fixed elastomer NBR bumpers at both ends for end-of-stroke deceleration rather than adjustable pneumatic cushions. Sensor grooves are built into the body, though this specific model ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75B |
|---|---|
| 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 ACQJ40X70-75B
| 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 ACQJ40X70-75B Is Used
Machining Fixture Stops
Dial in the exact extend position on a machining fixture when raw material thickness varies, using the external stop to avoid manufacturing new custom rods.
Carton Changeover Guides
Adjust the extend travel on a packaging line during carton size changeovers, shifting the stop to hit different box widths rapidly.
Press Trial Positions
Test multiple end positions on a light assembly press without swapping cylinders, fine-tuning the stroke window for different tooling depths.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75B the Right Cylinder?
Selecting this 40mm bore yields 628.3N push and 527.8N pull at 0.5MPa. If your application needs less force, the 32mm bore provides 402.1N push, while the 50mm bore offers 981.8N push for heavier loads. If exact positioning is fixed and never varies, a standard ACQ40 cylinder without the external stop is sufficient. When ordering, confirm the 40mm bore, 70mm full stroke, 75mm adjuster window, the male M14x1.5 rod thread, and note that no magnet is installed.
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 ACQJ40X70-75B FAQ
At 0.5MPa it provides 628.3N push and 527.8N pull, and 879.6N push at 0.7MPa. The maximum push is 128kgf at 1.0MPa. The full stroke is 70mm with a 75mm adjustment window, allowing a usable extend range of 0-70mm. The retract stroke is unaffected.
The external M12x1.25 threaded stop physically blocks the rod from extending further, shortening travel without changing piston area, so force remains identical to a standard ACQ40. Fixed elastomer bumpers decelerate the load at stroke end. This plain cylinder will not hold a load if air pressure drops; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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