Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40B 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 ACQJ20X75-40B
The AirTAC ACQJ20X75-40B is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 35 mm up to the full 75 mm stroke directly on the machine, while the retract stroke remains completely unaffected. It features a 10 mm piston rod and a male M8x1.25 rod-end thread that couples directly to your load.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore: 157.1 N push and 117.8 N pull at 0.5 MPa. The cylinder body includes fixed elastomer bumpers at both ends for end-of-stroke deceleration and retains magnetic-switch grooves, though this specific configuration ships without a magnet. Operating pressure spans 0.15 to 1.0 MPa, with a speed range of 30 to 500 mm/s.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40B |
|---|---|
| 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 ACQJ20X75-40B
| 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 ACQJ20X75-40B Is Used
Machining Fixture Clamps
Dial in the extend stop from 35 to 75 mm to accommodate varying raw material thicknesses on a milling fixture without machining new spacer blocks.
Packaging Diverter Arms
Adjust the actuation endpoint on the fly during product format changeovers to accurately push different carton widths onto secondary packaging lines.
Laboratory Press Stops
Set precise trial end positions for test equipment plungers, utilizing the external M8x1.25 adjuster thread to safely limit the downward travel distance.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-40B the Right Cylinder?
If your application only needs a fixed 75 mm extend stroke, a standard ACQ20X75 cylinder is sufficient. Choose this ACQJ20X75-40B model when your setup requires adjustable end positions within a 35 to 75 mm window. For higher force requirements, stepping up to the 25 mm bore yields 245.4 N push at 0.5 MPa, while dropping to the 12 mm bore provides 56.5 N push. When ordering, confirm the 20 mm bore, 75 mm full stroke, 40 mm adjuster window, the male M8x1.25 rod thread (-B), and whether you need the -S magnet option for sensor tracking.
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 ACQJ20X75-40B FAQ
The usable extend range is 35 to 75 mm (a 75 mm full stroke minus up to a 40 mm window). The force is identical to a standard ACQ: 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 retract stroke remains fixed at 75 mm.
The adjuster changes only the extend stroke length, not the piston area, so the output force is completely unchanged. End-of-stroke deceleration is handled by fixed elastomer bumpers at both ends rather than an adjustable air cushion. Note that this model lacks a sensor magnet, but the body retains grooves for mounting reed or solid-state switches if needed later.
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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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