Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 45mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke45 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 ACQJ20X45-40
The AirTAC ACQJ20X45-40 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 extend end position directly on your machine, yielding a usable extend range of 5-45 mm from the 45 mm full stroke. The retract stroke remains completely unaffected.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore. This 20 mm bore unit uses a 10 mm rod and an M8x1.25 adjuster thread, generating 157.1 N push and 117.8 N pull at 0.5 MPa. It relies on a fixed elastomer bumper at each end for deceleration and includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 45 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 ACQJ20X45-40
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40 Is Used
Product Changeover Stops
Quickly modify the extend end position on a machining fixture when switching between part families, avoiding the need to swap out the entire cylinder.
Trial End Positions
Dial in the exact clamping reach during machine commissioning by turning the external M8x1.25 stopper to find the optimal contact point.
Variable Sorting Diverter
Adjust the pusher extension on a packaging line to handle different carton sizes on the fly without interrupting the pneumatic supply.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40 the Right Cylinder?
When sizing this actuator, consider the adjacent bores: a 16 mm bore provides 100.5 N push @0.5 MPa, while a 25 mm bore yields 245.4 N. If your application never requires end-position adjustment, a standard fixed-stroke ACQ cylinder is sufficient. To order correctly, confirm the 20 mm bore, 45 mm full stroke, 40 mm adjuster window, female M5x0.8 rod-end thread, and whether you require the -S magnet option for solid-state or reed switch 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40 FAQ
This 20 mm bore cylinder generates 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 full stroke is 45 mm with a 40 mm adjustment window, allowing a usable extend range of 5-45 mm.
The external M8x1.25 threaded stop with a lock nut mechanically limits how far the rod extends, shortening the stroke length only. It does not alter the piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected, and deceleration is handled by fixed elastomer bumpers, not an adjustable air cushion.
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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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