Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X30-20SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X30-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke30 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 ACQJ20X30-20SB
The AirTAC ACQJ20X30-20SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 10 mm up to the full 30 mm directly on the machine without changing parts, while the retract stroke remains unaffected. The adjuster features an M8x1.25 thread.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore, delivering 157.1 N push at 0.5 MPa. This unit includes a male M8x1.25 piston rod end for direct load coupling and a built-in magnet for electronic or reed sensors. It uses a fixed elastomer bumper at each end for end-of-travel deceleration.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X30-20SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X30-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 30 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 ACQJ20X30-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×30 | 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 ACQJ20X30-20SB Is Used
Modular Assembly Fixtures
Dial in the exact extend end position during new product changeovers on modular assembly lines without machining new stop spacers.
Packaging Tucking Arms
Adjust the stroke length on the fly to tuck carton flaps of varying heights precisely before sealing.
CNC Tailstock Positioning
Set trial end positions for a pneumatic tailstock or clamping mechanism to accommodate different part lengths.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X30-20SB the Right Cylinder?
When sizing this 20 mm bore actuator, stepping down to a 16 mm bore drops the 0.5 MPa push force to 100.5 N, while moving up to a 25 mm bore increases it to 245.4 N. If your application never requires altering the extend end position, a fixed-stroke ACQ20 cylinder is sufficient. To order this adjustable variant correctly, confirm the 30 mm full stroke, the 20 mm adjustment window, the -S magnet, 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 ACQJ20X30-20SB FAQ
It provides 157.1 N push and 117.8 N pull at 0.5 MPa, and 219.9 N push at 0.7 MPa, with a maximum push of 32 kgf at 1.0 MPa. The full stroke is 30 mm with a 20 mm adjustment window, allowing a usable extend range of 10 to 30 mm.
No, the adjuster only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration and does not hold the load on air loss; for fail-safe holding, use an external rod lock.
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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