Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-30SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 25mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke25 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 ACQJ20X25-30SB
The AirTAC ACQJ20X25-30SB is a double-acting JIS compact cylinder with a 20mm bore and 25mm full stroke. An external threaded stop and lock nut limit the extend end position, providing a usable extend range of 0-25mm. Because the piston area remains unchanged, the output force is identical to a standard ACQ of this size, delivering 157.1N push at 0.5MPa. The retract stroke remains unaffected by the adjuster.
This model includes a male M8x1.25 piston rod end for direct load coupling and a built-in piston magnet for position sensing. It features fixed elastomer bumpers at both ends for end-of-stroke deceleration. The integrated magnetic switch grooves work seamlessly with reed or electronic solid-state switches, and the unit operates at speeds from 30 to 500 mm/s.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-30SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 25 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 ACQJ20X25-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 ACQJ20X25-30SB Is Used
Machine Tending Setup
Dial in the exact extend stop during initial machine commissioning to accommodate varying fixture heights without machining custom spacers.
Product Changeover Diverter
Quickly adjust the extend stroke on a packaging line diverter to handle different carton lengths on the fly.
Prototype Press End Stop
Test trial end positions on a lab press, safely limiting the 25mm stroke to a shorter travel distance during development.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-30SB the Right Cylinder?
For lower force needs, the 16mm bore provides 100.5N push at 0.5MPa, while the 25mm bore offers 245.4N push if your application requires more power. If the extend end position never needs on-the-fly tuning, a fixed-stroke ACQ20 cylinder is sufficient. When ordering this adjustable variant, confirm the 20mm bore, 25mm full stroke, 30mm adjustment window, the S magnet option, and the B male rod thread.
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 ACQJ20X25-30SB FAQ
The usable extend range is 0-25mm. The force is identical to a standard ACQ20: push is 157.1N and pull is 117.8N at 0.5MPa, push is 219.9N at 0.7MPa, and max push is 32kgf at 1.0MPa. The adjustment only alters stroke length, not force.
An external M8x1.25 threaded stop with a lock nut mechanically limits the extend travel, while fixed elastomer bumpers decelerate the piston near stroke ends. A plain ACQ-type cylinder does not hold its load on air loss; for a fail-safe hold, use 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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