Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke50 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20
The AirTAC ACQJ40X50-20 is a double-acting JIS compact cylinder featuring an external extend stop mechanism. A threaded adjuster with a lock nut lets you set the forward end position anywhere in a 30 to 50 mm usable range, shortening the 50 mm base stroke by up to 20 mm. The return stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ equivalent, yielding 628.3 N push at 0.5 MPa. The unit incorporates fixed NBR elastomer bumpers at both ends for impact absorption and features integrated sensor grooves, though this specific configuration ships without a magnet. Additional specifications include a 16 mm rod diameter, PT1/8 porting, and a female M8x1.25 rod-end thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 50 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 ACQJ40X50-20
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 ACQJ40X50-20 Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC fixture during part family changeovers, using the external stop to set the forward position precisely without disassembling the tooling.
Carton Forming Arms
Adjust the tucking arm extension on packaging lines to accommodate different box formats, relying on the 30-50 mm usable window to tune the endpoint quickly on the machine.
Bending Machine Backgauges
Fine-tune the material stop position on a press brake for trial bends, allowing operators to tweak the extend endpoint by up to 20 mm while maintaining the full retract stroke.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-20 the Right Cylinder?
If you require less thrust, the adjacent bore 32 provides 402.1 N push at 0.5 MPa, or for higher force, the bore 50 offers 981.8 N push. Select this adjustable variant when your fixture setup or product changeover requires varying extend endpoints without swapping cylinders; if your end position never changes, a fixed-stroke ACQ is sufficient. When ordering, verify the 40 mm bore, 50 mm full stroke, 20 mm adjustment window, female M8x1.25 rod thread, and confirm whether a magnet is needed for switch detection.
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 ACQJ40X50-20 FAQ
This cylinder delivers 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 50 mm, and the external adjuster provides a usable extend range of 30-50 mm (a 20 mm window), while the retract stroke remains fixed.
No, the adjuster only changes the extend stroke length, so force remains identical to a standard ACQ of the same bore. Deceleration at the end of travel is handled by fixed elastomer bumpers, not adjustable air cushions, so for high-energy loads you should slow the approach or add an external shock absorber.
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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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