Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-20S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 25mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke25 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 ACQJ20X25-20S
The AirTAC ACQJ20X25-20S is a double-acting JIS compact cylinder featuring an external extend stop. An M8x1.25 threaded adjuster with a lock nut lets you fine-tune the forward end position directly on the machine, yielding a usable extend range of 5-25 mm. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force equals a standard ACQ of this size, delivering 157.1 N push at 0.5 MPa. The body includes magnetic-switch grooves compatible with reed or solid-state sensors, and fixed elastomer bumpers handle end-of-stroke deceleration without needing adjustable air cushions.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-20S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 25 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 ACQJ20X25-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 ACQJ20X25-20S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC lathe fixture without machining new spacer blocks during product changeovers.
Carton Sealing Tension
Adjust the pressing depth of sealing jaws on a packaging line to accommodate varying box heights on the fly.
Bending Pilot Positions
Set trial end positions for a metal forming pilot to find the optimal bend depth before finalizing hard stops.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X25-20S the Right Cylinder?
If you need less push, the bore 12 version provides 56.5 N at 0.5 MPa, while stepping up to bore 25 yields 245.4 N for heavier loads. A fixed-stroke ACQ is sufficient if your extend endpoint never requires field adjustment. When ordering this unit, confirm the 20 mm bore, 25 mm full stroke, 20 mm adjustment window, the S magnet option, and your preferred rod-end thread.
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 ACQJ20X25-20S FAQ
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 usable extend range is 5-25 mm, created by a 20 mm adjustment window on a 25 mm full stroke.
No, the threaded stop limits only the forward stroke length, leaving the retract stroke unaffected. Force remains identical to a standard ACQ because the piston area is unchanged, and fixed elastomer bumpers absorb end-of-stroke impact.
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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