Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20SB 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 ACQJ20X45-20SB
The AirTAC ACQJ20X45-20SB is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend stroke from 25 mm up to the full 45 mm directly on your equipment, while the retract stroke remains completely unaffected.
Because the piston area stays the same, output force equals a standard ACQ bore 20 unit, delivering 157.1 N push at 0.5 MPa. This variant includes a male M8x1.25 rod end for direct load coupling, a built-in magnet for electronic or reed sensors, and fixed elastomer bumpers to absorb end-of-travel energy.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20SB |
|---|---|
| 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 ACQJ20X45-20SB
| 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 ACQJ20X45-20SB Is Used
Machining Fixture Clamping
Dial in the exact clamping reach on a CNC mill fixture between 25 and 45 mm to accommodate raw stock of varying widths without machining custom spacers.
Packaging Diverter Stroke
Adjust the pusher rod extension on a packaging line conveyor to deflect different carton sizes precisely into the correct sorting lane during product changeover.
Electronic Component Testing
Set trial end positions for a testing probe head on a PCB assembly station, allowing operators to tweak probe depth safely without swapping the actuator.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-20SB the Right Cylinder?
If your application only needs a fixed 45 mm extension, a standard ACQ20X45 cylinder is sufficient. However, if your setup requires variable end positions within a 25-45 mm range, this ACQJ20X45-20SB is the correct choice. For higher force requirements, stepping up to a bore 25 yields 245.4 N push at 0.5 MPa, whereas dropping to a bore 16 provides 100.5 N push. Confirm your ordering essentials: 20 mm bore, 45 mm full stroke, 20 mm adjuster window, male rod thread, and the piston 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 ACQJ20X45-20SB FAQ
This cylinder provides 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 25-45 mm, created by the 20 mm adjustment window on the 45 mm full stroke.
The external M8x1.25 threaded stop with a lock nut limits how far the rod extends, allowing on-machine tuning without changing parts. It changes stroke length only, so force remains identical to a standard ACQ. Fixed elastomer bumpers absorb end impact, and the -S magnet works with reed or solid-state switches.
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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