Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke40 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 ACQJ20X40-30B
The AirTAC ACQJ20X40-30B is a double-acting JIS compact cylinder with a 40mm full stroke and a male M8x1.25 rod end. An external M8x1.25 threaded stop and lock nut restricts the forward extension, providing a usable extend range of 10-40mm without swapping parts. The return stroke remains fixed at its original length. Because the piston area stays the same, output force is identical to a standard ACQ of this size.
This bore 20 unit delivers 157.1N push and 117.8N pull at 0.5MPa, peaking at 32kgf under 1.0MPa. It relies on fixed TPU elastomer bumpers at both ends rather than adjustable pneumatic cushions. Operating speeds span 30-500mm/s, and while it lacks a factory magnet, the body retains magnetic-switch grooves for adding position sensors later.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 40 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 ACQJ20X40-30B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 ACQJ20X40-30B Is Used
Prototype Forming Stops
Dial in the exact extension depth on prototype stamping presses by turning the external stop screw, allowing safe trial end positions without machining new spacers.
Product Changeover Pins
Accommodate varying panel thicknesses on an assembly line by adjusting the forward stroke limit on the fly, ensuring correct insertion depth for each batch.
Variable Depth Tamping
Modify the product settle depth inside cartons by fine-tuning the extend stop, adapting to different fill volumes directly at the packaging station.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-30B the Right Cylinder?
Selecting this bore 20 actuator means needing precise forward positioning within a 10-40mm window. If your application requires less push force, stepping down to a bore 16 yields 100.5N at 0.5MPa, whereas upgrading to bore 25 provides 245.4N. A fixed-stroke ACQ is adequate if the end position never requires on-machine tweaking. Confirm your ordering parameters carefully: 20mm bore, 40mm full stroke, 30mm adjustment window, male rod thread, and no magnet.
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 ACQJ20X40-30B FAQ
This cylinder provides 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 full stroke is 40mm with a 30mm adjustment window, yielding a usable extend range of 10-40mm.
The male M8x1.25 threaded rod with a lock nut physically blocks the piston from reaching full extension, shortening the stroke without changing piston area, so force remains identical to a standard ACQ. Deceleration relies on fixed TPU bumpers, not adjustable air cushions, 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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