Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 45mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke45 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20B
The AirTAC ACQJ40X45-20B is a double-acting JIS compact cylinder featuring an external male-threaded stop with a lock nut. This mechanism limits the extend end position, providing a usable extend range of 25 to 45 mm from the 45 mm full stroke. The retract stroke remains completely unaffected. A PT1/8 port and 16 mm rod drive the piston.
Because the piston area stays constant, output force equals a standard ACQ of the same bore, delivering 628.3 N push at 0.5 MPa. This unit includes a male M14x1.5 rod-end thread for direct load coupling. It uses fixed NBR elastomer bumpers at each end for deceleration rather than adjustable air cushions. The body features sensor grooves, though this specific SKU ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 45 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 ACQJ40X45-20B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×45 | 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 ACQJ40X45-20B Is Used
Machining Fixture Stops
Dial in the exact extend position from 25 to 45 mm on CNC fixtures to accommodate varying raw material thicknesses without machining new stop blocks.
Product Changeover Pins
Retune the extend endpoint rapidly on packaging lines during format size changes, using the external M12x1.25 adjuster thread to set the new resting point.
Prototype Positioning
Test multiple extend endpoints on a 40 mm bore assembly rig to find the optimal travel distance, relying on the unchanged 879.6 N push force at 0.7 MPa.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20B the Right Cylinder?
Choosing this 40 mm bore yields 628.3 N push and 527.8 N pull at 0.5 MPa. Stepping down to a 32 mm bore drops push to 402.1 N, while moving up to a 50 mm bore increases it to 981.8 N. If your extend position never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 45 mm full stroke, the 20 mm adjustment window, the male M14x1.5 rod thread, and whether you need the -S magnet option for 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 ACQJ40X45-20B FAQ
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, the push force is 879.6 N, with a maximum push of 128 kgf at 1.0 MPa. The full stroke is 45 mm, and the external adjuster allows the extend stroke to be shortened by up to 20 mm, yielding a usable extend range of 25 to 45 mm.
The external threaded stop with a lock nut limits only the extend stroke; the retract stroke and the piston area remain unchanged, so force stays identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for end-of-stroke deceleration. It does not hold the load on air loss, so an external rod lock or pilot-operated check valve is recommended for fail-safe holding.
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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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