Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-30B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-30B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke75 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 ACQJ20X75-30B
The AirTAC ACQJ20X75-30B is a double-acting JIS compact cylinder featuring an external threaded stop that lets you fine-tune the extend end position directly on your equipment. With a 75mm full stroke and a 30mm adjustment window, the usable extend range spans 45 to 75mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area stays the same, output force is identical to a standard ACQ of this bore.
This 20mm bore unit delivers 157.1N of push force and 117.8N of pull force at 0.5MPa, with a maximum push capacity of 32kgf at 1.0MPa. It includes a male M8x1.25 rod-end thread for direct load coupling, an M5x0.8 port, and fixed elastomer bumpers at both ends for end-of-stroke deceleration. The body retains sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-30B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-30B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 75 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 ACQJ20X75-30B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 ACQJ20X75-30B Is Used
Machining Fixture Stops
Dial in the exact extend position for varying part heights on a milling fixture without machining new stop collars.
Product Changeover Diverter
Adjust the stroke on a packaging line diverter to accommodate different carton widths during rapid product changeover.
Prototype Press Testing
Set trial end positions on a laboratory press to find the optimal engagement distance before finalizing the assembly.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-30B the Right Cylinder?
When sizing this 20mm bore actuator, a smaller 16mm bore provides 100.5N push at 0.5MPa, while stepping up to a 25mm bore yields 245.4N. Choose this adjustable model only if your application requires varying the extend end-point within the 45-75mm range; otherwise, a fixed-stroke ACQ cylinder is simpler and more cost-effective. Confirm your ordering parameters including the 75mm full stroke, 30mm window, male rod thread (-B), and whether you need the -S magnet option for position sensing.
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 ACQJ20X75-30B FAQ
This 20mm bore cylinder has a 75mm full stroke with a 30mm adjustable window, giving a usable extend range of 45-75mm. It delivers 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. The retract stroke is unaffected by the extend adjuster.
An external M8x1.25 threaded stop with a lock nut limits how far the rod extends, allowing on-machine tuning without changing parts. The force remains identical to a standard ACQ because the piston area is unchanged. The cylinder uses fixed elastomer bumpers for deceleration, not an adjustable air cushion, so external shock absorbers are recommended for high-energy loads.
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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