Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-40
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-40 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke50 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 ACQJ20X50-40
The AirTAC ACQJ20X50-40 is a double-acting JIS compact cylinder featuring an external M8x1.25 threaded stop with a lock nut that limits the extend end position. With a full stroke of 50 mm and a 40 mm adjustment window, the usable extend range is 10-50 mm. The retract stroke remains completely unaffected by this mechanism. Because the piston area stays constant, the output force is identical to a standard ACQ of this bore.
Operating between 0.15 and 1.0 MPa, this unit delivers 157.1 N of push force at 0.5 MPa. It uses a 10 mm piston rod with a female M5x0.8 end thread and an M5x0.8 port. Deceleration is handled by fixed TPU elastomer bumpers at both ends rather than adjustable air cushions. The body includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-40 Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-40 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 50 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 ACQJ20X50-40
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 ACQJ20X50-40 Is Used
Machining Fixture Stops
Dial in the exact extend position from 10 to 50 mm on a CNC fixture without machining new spacers for different part heights.
Carton Changeover Pushers
Quickly reposition the extend endpoint on a packaging line to accommodate varying box widths while maintaining the same retract stroke.
Prototype Press Tonnage
Set trial end positions on a laboratory press, utilizing the 32 kgf maximum push at 1.0 MPa to test assembly insert depths.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-40 the Right Cylinder?
If 157.1 N of push at 0.5 MPa is excessive, stepping down to a 16 mm bore drops the push to 100.5 N. Conversely, moving up to a 25 mm bore increases the 0.5 MPa push to 245.4 N. A fixed-stroke ACQ20X50 is sufficient if your end position never requires tuning. When ordering, confirm the 20 mm bore, 50 mm full stroke, 40 mm window, female rod thread, and whether you need the -S magnet option for reed or solid-state switches.
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 ACQJ20X50-40 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 full stroke is 50 mm with a 40 mm window, allowing the extend range to be adjusted from 10 to 50 mm.
The M8x1.25 external stop with lock nut only changes the extend stroke length; it does not alter the piston area, so force remains identical to a standard ACQ. The cylinder relies on fixed TPU elastomer bumpers for end-of-stroke deceleration, and this model ships without 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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