Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke75 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 ACQJ20X75-20SB
The AirTAC ACQJ20X75-20SB is a double-acting JIS compact cylinder with an external threaded stop that lets you fine-tune the extend end position directly on your equipment. With a 75mm full stroke and a 20mm adjustment window, the usable extend range spans 55 to 75mm. The retract stroke remains completely unaffected by this mechanism. An M8x1.25 male rod thread couples directly to your load.
Because the adjustment only limits travel length and not piston area, output force stays identical to a standard ACQ of this bore. You get 157.1N push and 117.8N pull at 0.5MPa. The body incorporates fixed elastomer bumpers for end-of-stroke deceleration and features magnetic-switch grooves. Equipped with the -S magnet, it operates seamlessly with both reed and solid-state electronic sensors.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 75 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 ACQJ20X75-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 ACQJ20X75-20SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC fixture without machining new spacers, accommodating different raw material thicknesses on the fly.
Packaging Changeover
Rapidly reposition the extend endpoint for varying carton sizes on a packaging line by turning the external stop screw and tightening the lock nut.
Assembly Trial Positions
Test and set precise press-in depths for component insertion on an assembly machine, finding the optimal end point before locking it down.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20SB the Right Cylinder?
Choosing this 20mm bore provides 157.1N push at 0.5MPa. If your application requires less force, stepping down to a 16mm bore yields 100.5N push, while moving up to a 25mm bore provides 245.4N push. A fixed-stroke ACQ is sufficient if your end position never varies. When ordering, confirm the 75mm full stroke, 20mm window, the -S magnet, and the -B male rod thread. Note that a plain compact cylinder drifts if air pressure is lost; utilize an external rod lock for fail-safe load holding.
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 ACQJ20X75-20SB FAQ
It delivers 157.1N push and 117.8N pull at 0.5MPa, 219.9N push at 0.7MPa, and a maximum push of 32kgf at 1.0MPa. The usable extend range is 55 to 75mm, created by a 20mm adjustment window on the 75mm full stroke.
An M8x1.25 external threaded screw with a lock nut limits the extend travel, allowing on-machine tuning without changing parts. It alters stroke length only, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration, not adjustable air cushions.
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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