Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20 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 ACQJ20X45-20
The AirTAC ACQJ20X45-20 is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You get a usable extend range of 25 to 45 mm, as the 20 mm adjustment window simply shortens the full 45 mm outward stroke. The retract movement remains completely unaffected.
Because the piston area is unchanged, output force stays identical to a standard ACQ of this bore, delivering 157.1 N push at 0.5 MPa. The unit uses a 10 mm rod with an M5x0.8 female thread end, an M8x1.25 male adjuster, and fixed elastomer TPU bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20 |
|---|---|
| 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 ACQJ20X45-20
| 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 ACQJ20X45-20 Is Used
Machining Fixture Stops
Dial in the exact 25 to 45 mm clamping reach on a CNC fixture without fabricating new spacers for each part run.
Product Changeover Diverter
Adjust the extend length on a packaging line diverter gate on the fly to accommodate varying carton widths.
Assembly Press Trial
Find the optimal end position for pressing bearings during prototype runs by tweaking the external stop nut.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20 the Right Cylinder?
If you need slightly less thrust, the adjacent smaller 16 mm bore provides 100.5 N push at 0.5 MPa, whereas stepping up to the 25 mm bore yields 245.4 N. A fixed-stroke ACQ20 is sufficient if your end position never requires shifting. When ordering this adjustable variant, confirm the 20 mm bore, 45 mm full stroke, 20 mm window, female rod thread, and note this unit ships without a magnet.
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 ACQJ20X45-20 FAQ
The force equals a standard ACQ bore 20: 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, but the external stop provides a 20 mm window, giving a usable extend range of 25 to 45 mm.
The external M8x1.25 threaded stop with lock nut limits only the extend length, leaving the retract stroke and piston area unchanged so force remains identical. Fixed elastomer bumpers decelerate the rod near stroke ends. This cylinder does not hold its load on air loss, so add an external rod lock for fail-safe holding.
Authorized Export Seller
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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