Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 45mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke45 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 ACQJ20X45-50S
The AirTAC ACQJ20X45-50S is a double-acting JIS compact cylinder with a 20mm bore and a 45mm full stroke. An external threaded stop with a lock nut restricts the extend end position, providing a usable forward range of 0 to 45mm. The retract movement remains completely unaffected by this mechanism.
Because the piston area is unchanged, output force is identical to a standard ACQ of this size, yielding 157.1N push at 0.5MPa. The unit features a fixed elastomer bumper at each end and a built-in piston magnet for position sensing.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 45 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 ACQJ20X45-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×45 | 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 ACQJ20X45-50S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC fixture without machining custom spacers.
Product Changeover Diverter
Quickly reposition a conveyor sorting gate when switching between different package lengths.
Sealing Head Height
Fine-tune the downward travel of a carton sealing jaw to match varying board thicknesses.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50S the Right Cylinder?
If 157.1N push at 0.5MPa is insufficient, step up to the 25mm bore (245.4N); if your load is lighter, the 16mm bore provides 100.5N. Choose a fixed-stroke ACQ if your end position never requires field adjustment. To order this unit correctly, confirm the 20mm bore, 45mm full stroke, 50mm window, the S magnet option, and the default female 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 ACQJ20X45-50S FAQ
The usable extend range is 0-45mm (45mm full stroke minus up to a 50mm window). Force is identical to a standard ACQ: 157.1N push and 117.8N pull at 0.5MPa, 219.9N push at 0.7MPa, and a maximum push of 32kgf at 1.0MPa.
An external M8x1.25 threaded stop with a lock nut limits the forward travel; the retract stroke is unaffected. The adjuster changes stroke length only, not force. Deceleration comes from a fixed elastomer bumper, and the built-in magnet works with reed or solid-state switches.
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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