Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30B 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 ACQJ40X70-30B
The AirTAC ACQJ40X70-30B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the EXTEND end position. You can fine-tune the usable forward range from 40 mm up to the full 70 mm on your machinery, while the RETRACT stroke remains completely unaffected. Because the piston area stays constant, the output force is identical to a standard ACQ of this bore.
This 40 mm bore unit delivers 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. It features a male M14x1.5 rod-end thread for direct load coupling, a PT1/8 port, and a fixed NBR elastomer bumper at each end for end-of-stroke deceleration. The body includes magnetic-switch grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30B |
|---|---|
| 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 ACQJ40X70-30B
| 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 ACQJ40X70-30B Is Used
Machining Fixture Stops
Dial in exact clamping positions on a machining fixture across varying part lengths without swapping out cylinder hardware.
Product Changeover Diverter
Quickly reposition a conveyor diverting gate to accommodate new package dimensions by adjusting the extend stop on the line.
Carton Sealing Press
Test and set the ideal downward end position for a carton sealing head during initial machine commissioning.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30B the Right Cylinder?
Choosing this bore gives 628.3 N push at 0.5 MPa; stepping down to a 32 mm bore yields 402.1 N, while stepping up to a 50 mm bore provides 981.8 N. If your setup never requires altering the forward end position, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 40 mm bore, 70 mm full stroke, 30 mm adjustment window, the male rod thread (-B), and whether you need the -S magnet option for position sensing.
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 ACQJ40X70-30B FAQ
This 40 mm bore cylinder has a 70 mm full stroke with a 30 mm adjustment window, allowing a usable extend range of 40-70 mm. It 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 port size is PT1/8.
No, the external M12x1.25 threaded stop only limits the forward stroke length; the force remains identical to a standard ACQ because the piston area is unchanged. The cylinder uses a fixed NBR elastomer bumper for deceleration and does not hold the load on air loss, so an external rod lock is needed for fail-safe holding.
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Covers non-human-caused product damage.
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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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