Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20B 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 ACQJ20X75-20B
The AirTAC ACQJ20X75-20B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend range from 55 mm up to the full 75 mm directly on your machine without swapping parts, while the retract stroke remains unaffected. It includes a male M8x1.25 rod-end thread for direct load coupling.
Because the piston area stays the same, the output force is identical to a standard ACQ of this bore, delivering 157.1 N push and 117.8 N pull at 0.5 MPa. The unit relies on a fixed elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion, and the body retains sensor grooves even though this specific configuration ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20B |
|---|---|
| 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 ACQJ20X75-20B
| 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 ACQJ20X75-20B Is Used
Machine Tending Setup
Dial in the exact extend position during initial fixture setup on CNC load stations, allowing 55 to 75 mm of rod travel to accommodate varying part heights without machining new spacers.
Product Changeover Stops
Adjust the physical end-stop position rapidly on packaging lines when switching between different carton sizes, using the external lock nut to secure the new extend length in seconds.
Prototype End Positions
Test trial extend endpoints on lab automation equipment by turning the M8x1.25 adjuster screw, finding the optimal reach for a delicate pick-and-place operation before finalizing the design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-20B the Right Cylinder?
When sizing this 20 mm bore actuator, note the neighbouring options: stepping down to a 16 mm bore drops the push force to 100.5 N at 0.5 MPa, whereas moving up to a 25 mm bore increases it to 245.4 N. If your application never requires shifting the end position, a fixed-stroke ACQ cylinder will achieve the same holding force more economically. To order this adjustable version correctly, confirm the 20 mm bore, the 75 mm full stroke, the 20 mm adjustment window, the male rod thread option B, and whether you need the S magnet 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 ACQJ20X75-20B FAQ
The usable extend range is 55-75 mm (a 75 mm full stroke minus up to a 20 mm window). The force is identical to a standard ACQ bore 20: push is 157.1 N and pull is 117.8 N at 0.5 MPa, push is 219.9 N at 0.7 MPa, and the maximum push is 32 kgf at 1.0 MPa.
The external M8x1.25 threaded stop with a lock nut limits only the extend stroke length, leaving the retract stroke untouched; it does not change the piston area, so force remains constant. End-of-stroke deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion, so you should slow the approach or use an external shock absorber 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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