Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke75 mm
- Port sizeM5×0.8
- Adjuster threadM8×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40
The AirTAC ACQJ20X75-40 is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend stroke. You can fine-tune the rod extension on the machine across a 35 to 75 mm usable range, while the retract stroke remains completely unaffected. Because the piston area stays the same, the output force is identical to a standard ACQ of this bore.
This unit features a 10 mm piston rod and an M8x1.25 external adjuster thread. It relies on a fixed elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. The body includes magnetic-switch grooves, though this specific configuration ships without a magnet. Operating pressure spans 0.15 to 1.0 MPa, and the standard PT port is an M5x0.8 fitting.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 75 mm |
| Adjuster thread | M8×1.25 |
| Port size | M5×0.8 |
| 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 | M5×0.8 (F) / M8×1.25 (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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40 Is Used
Machining Fixture Stops
Dial in the exact clamping extension on a CNC lathe fixture during part-changeover without machining new stop collars.
Carton Sealing Tensioners
Adjust the sealing head downward pressure on a packaging line to accommodate varying cardboard thicknesses on the fly.
Assembly Press Trial
Set trial end positions for a pin-insertion press in electronics assembly, allowing precise depth tweaks before finalizing the stroke.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40 the Right Cylinder?
When sizing this 20 mm bore unit, note it yields 157.1 N push and 117.8 N pull at 0.5 MPa. If your application requires less force, stepping down to a 16 mm bore provides 100.5 N push, whereas moving up to a 25 mm bore offers 245.4 N push. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient and simpler. For this adjustable version, confirm the 75 mm full stroke, the 40 mm window, the female rod-end thread, and whether you need the S magnet option for sensor tracking.
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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40 FAQ
The force is identical to a standard ACQ20 because the adjuster only changes stroke length. It delivers 157.1 N push and 117.8 N pull at 0.5 MPa, 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa. The usable extend range is 35 to 75 mm, set via the 40 mm adjustment window.
An external M8x1.25 threaded stop with a lock nut limits the extend distance, while the retract stroke stays fixed. Deceleration relies on a fixed elastomer bumper, not an adjustable air cushion. A plain compact cylinder does not hold its load on air loss; for a fail-safe hold, install an external rod lock or pilot-operated check valve.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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