Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50B 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 ACQJ40X70-50B
The AirTAC ACQJ40X70-50B is a double-acting JIS compact cylinder featuring a male-thread piston rod end (M14x1.5) for direct load coupling. An external M12x1.25 threaded stop and lock nut restricts the forward extension, providing a usable extend range of 20 to 70 mm. The return stroke remains completely unaffected by this mechanism.
Because the adjuster only limits travel length, the piston area stays the same, meaning output force is identical to a standard ACQ of this bore. The 40 mm bore delivers 628.3 N of push force at 0.5 MPa, while the body incorporates sensor grooves for adding reed or solid-state switches. Fixed NBR elastomer bumpers absorb impact energy at both stroke ends.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50B |
|---|---|
| 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 ACQJ40X70-50B
| 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 ACQJ40X70-50B Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining center during setup. The external stop allows operators to shift the 20 to 70 mm extension point quickly between different part fixtures.
Packaging Changeover
Adapt product pusher lengths on a packaging line without swapping cylinders. The adjustable forward stop accommodates varying carton sizes on the fly.
Assembly Press Trials
Test varying insertion depths on an electronic assembly press. The lock nut secures the precise extension, preventing drift during repetitive cycling.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50B the Right Cylinder?
Selecting this 40 mm bore yields 628.3 N push and 527.8 N pull at 0.5 MPa. If your application requires less force, the 32 mm bore offers 402.1 N push, whereas stepping up to a 50 mm bore provides 981.8 N. A fixed-stroke ACQ is sufficient if your end position never varies. When ordering this adjustable variant, confirm the 70 mm full stroke, the 50 mm window, the male rod thread, and whether you need a magnet, as this specific unit ships without one.
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 ACQJ40X70-50B 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 70 mm, and with the 50 mm adjustment window, the usable extend range is 20 to 70 mm.
The external M12x1.25 threaded stop with lock nut mechanically limits how far the rod extends, shortening the forward stroke without changing the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at both ends, not an adjustable air cushion. Note that this model ships without a sensor magnet.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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