
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X60-20 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 60mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
The AirTAC ACQJ20X60-20 is a double-acting JIS compact cylinder featuring an external extend-stop mechanism. A threaded M8x1.25 adjuster and lock nut restricts forward travel, yielding a usable extension range of 40 to 60 mm from the 60 mm full stroke. Retraction movement remains completely unaffected. Because the piston area stays constant, output force equals that of a standard ACQ counterpart.
This 20 mm bore unit generates 157.1 N of push force and 117.8 N of pull force at 0.5 MPa, peaking at 32 kgf under 1.0 MPa. The body incorporates fixed elastomer bumpers for end-of-stroke deceleration and includes machined grooves for mounting reed or solid-state sensors. Please note this specific configuration ships without a magnetic piston.
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X60-20 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 60 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.
| 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.
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×60 | 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).
Dial in exact clamping reach on a CNC mill during prototype runs or when swapping raw material blanks without programming new axis coordinates.
Modify the folding arm extension on a packaging line to accommodate various box heights quickly, preventing crushing of taller or shorter containers.
Set precise diverting distances for product changeovers on a conveyor belt, allowing the stopper rod to adapt to different package widths on the fly.
If your application requires less thrust, the 16 mm bore variant provides 100.5 N push at 0.5 MPa, whereas stepping up to a 25 mm bore yields 245.4 N. Choose this adjustable model when setups demand frequent modifications to the forward end position; otherwise, a fixed-stroke ACQ20 is simpler. Confirm your ordering parameters including the 20 mm bore, 60 mm base stroke, 20 mm window, female rod-end thread, and whether a magnet (-S) is needed for switching.
Quick checklist
It delivers 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 external stop allows the extend stroke to be fine-tuned within a 40 to 60 mm usable range.
An external M8x1.25 threaded stop with a lock nut limits the forward extension length without altering the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed elastomer bumpers at both ends, not an adjustable air cushion.
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