Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SLB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SLB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 80mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke80 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 ACQJ20X80-40SLB
The AirTAC ACQJ20X80-40SLB 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 40 mm up to the full 80 mm directly on your machinery, while the retract stroke remains completely unaffected. Because the piston area stays the same, output force equals a standard ACQ of this bore.
This bore 20 mm unit delivers 157.1 N push at 0.5 MPa using its 10 mm rod, and includes a fixed elastomer bumper at each end for end-of-stroke deceleration. The -S piston magnet pairs with reed or solid-state switches, and the LB mounting bracket provides a robust pivot interface. The male rod-end thread is M8x1.25.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SLB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SLB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 80 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 ACQJ20X80-40SLB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 ACQJ20X80-40SLB Is Used
Machining Fixture Clamping
Dial in the exact clamping reach on a CNC fixture by turning the external stop, accommodating different raw material thicknesses without machining new spacers.
Packaging Line Diverters
Adjust the diverting arm extension on the fly during product changeover to handle varying carton widths on a packaging conveyor.
Assembly Press Trial Stops
Set trial end positions for a light-duty assembly press, safely testing the 40-80 mm extend range before locking the nut for production runs.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SLB the Right Cylinder?
If you need less push, the 16 mm bore yields 100.5 N at 0.5 MPa; stepping up to the 25 mm bore provides 245.4 N. Choose this 20 mm bore when your application requires roughly 157 N of thrust. If your extend end position never varies, a fixed-stroke ACQ cylinder is sufficient. To order this adjustable version, confirm the 80 mm full stroke, 40 mm adjustment window, -S magnet, male rod thread, and LB mount.
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 ACQJ20X80-40SLB FAQ
It 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 40-80 mm, meaning the 80 mm full stroke can be shortened by up to the 40 mm window.
The M8x1.25 external threaded stop mechanically limits the extend length without altering the piston area, so force remains identical to a standard ACQ. Deceleration relies on a fixed elastomer bumper, not an adjustable air cushion. Note that this cylinder will not hold a load if air pressure drops; use an external rod lock for fail-safe holding.
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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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