Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X15-20B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X15-20B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 15mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke15 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 ACQJ20X15-20B
The AirTAC ACQJ20X15-20B is a double-acting JIS compact cylinder featuring a male-thread piston rod (M8x1.25) that couples directly to your load. An external stop screw with a lock nut limits the extend stroke, providing a usable forward range of 0 to 15 mm from a 15 mm full stroke. The retract movement remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of this bore. You get 157.1 N push and 117.8 N pull at 0.5 MPa, with a maximum push capacity of 32 kgf at 1.0 MPa. The body incorporates sensor grooves for reed or solid-state switches, though this specific unit ships without a magnet. Deceleration relies on a fixed elastomer bumper at each end, not an adjustable air cushion.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X15-20B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X15-20B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 15 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 ACQJ20X15-20B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×15 | 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 ACQJ20X15-20B Is Used
Product Changeover Stops
Dial in the extend stop from 0 to 15 mm on the machine when switching between small part variants, avoiding the need to fabricate new spacer collars.
Film Feed Tensioning
Fine-tune the forward push position of a packaging guide arm to perfectly register film webs before a sealing jaw closes.
Prototype Position Trials
Sweep the extend end-stop during lab testing to find the exact ejection point for a delicate electronic component before locking the nut.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X15-20B the Right Cylinder?
For sizing, the adjacent 16 mm bore yields 100.5 N push at 0.5 MPa, while the 25 mm bore provides 245.4 N. This 20 mm model hits 157.1 N, making it a solid middle ground for light actuation. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 20 mm bore, 15 mm full stroke, 20 mm adjuster window, the male M8x1.25 rod end, and PT port threads. Note that a plain ACQ does not hold its load on air loss; add an external rod lock or pilot-operated check valve for fail-safe positioning.
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 ACQJ20X15-20B FAQ
The usable extend range is 0 to 15 mm (15 mm full stroke minus a 20 mm window). Force is unchanged from a standard ACQ: 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 adjuster has an M8x1.25 thread.
A threaded stop screw with a lock nut limits the extend distance without altering the piston area, so force remains constant. The retract stroke is unaffected. Both ends use a fixed elastomer bumper for deceleration rather than an adjustable air cushion, so for high kinetic energy you should slow the approach or use an external shock absorber. This model lacks a sensor magnet.
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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