Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 35mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke35 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 ACQJ20X35-30S
The AirTAC ACQJ20X35-30S is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You get a usable extend range of 5-35 mm (full 35 mm stroke minus the 30 mm window), while the retract stroke remains unaffected. The M8x1.25 adjuster thread allows on-machine end-position tuning without swapping parts.
Because the piston area is unchanged, force equals a standard ACQ of this bore: 157.1 N push and 117.8 N pull at 0.5 MPa. The 20 mm bore uses an M5x0.8 port, a 10 mm rod, and fixed elastomer bumpers at each end. The built-in magnet (-S) works with reed or electronic solid-state switches in the body grooves.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 35 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 ACQJ20X35-30S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×35 | 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 ACQJ20X35-30S Is Used
Machining Fixture Clamps
Dial in the exact clamping reach on machining fixtures during setup, shortening the extend stroke within the 5-35 mm window to accommodate varying part thicknesses without disassembling the tooling.
Product Changeover Stops
Adjust the physical end-stop position on conveyor lines for different package lengths, using the external M8x1.25 adjuster to rapidly switch product formats on the fly.
Lab Test Positioning
Set precise trial end positions for testing probes or sensors in laboratory automation, tweaking the extend distance to find the optimal contact point without machining new spacers.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30S the Right Cylinder?
For 0.5 MPa push needs below 157.1 N, step down to the 16 mm bore (100.5 N); if you need more than 219.9 N at 0.7 MPa, step up to the 25 mm bore (343.6 N). If your application never requires altering the extend end position, a fixed-stroke ACQ cylinder suffices. When ordering, confirm the 20 mm bore, 35 mm full stroke, 30 mm window, the -S magnet, and the default female M5x0.8 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 ACQJ20X35-30S FAQ
The usable extend range is 5-35 mm (full 35 mm stroke minus the 30 mm window). 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 max push of 32 kgf at 1.0 MPa. The bore is 20 mm, the port is M5x0.8, the rod is 10 mm, and the external adjuster thread is M8x1.25.
The external threaded stop with a lock nut limits only the extend stroke; the retract stroke and piston area are unaffected, so force remains unchanged. Fixed elastomer bumpers decelerate the rod near stroke ends, but the cylinder does not hold its load on air loss—add an external rod lock or pilot-operated check valve for fail-safe holding.
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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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