Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20SB 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 ACQJ20X35-20SB
The ACQJ20X35-20SB is a double-acting JIS compact cylinder with a 20mm bore and a 35mm full stroke. It features an external M8x1.25 threaded stop with a lock nut that lets you fine-tune the extend end position on the machine. The usable extend range spans 15 to 35mm, while the retract stroke remains completely unaffected. A built-in piston magnet enables compatibility with reed or solid-state switches.
Because the adjuster only limits travel, the piston area stays the same, meaning the output force is identical to a standard ACQ of this size. You get 157.1N of push force at 0.5MPa and 117.8N of pull force. The body incorporates fixed elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions. Operating pressure ranges from 0.15 to 1.0MPa, and the standard M5x0.8 port ensures reliable pneumatic supply.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20SB |
|---|---|
| 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 ACQJ20X35-20SB
| 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 ACQJ20X35-20SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC fixture during part changeovers using the external stop, avoiding the need to manufacture new spacer blocks.
Carton Sealing Tension
Adjust the sealing head pressure on the fly for varying package heights, ensuring consistent flap closure without reprogramming the machine.
Bending Trial Positions
Find the perfect metal forming angle on a press brake by tweaking the extend stop in 1mm increments during initial prototype runs.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20SB the Right Cylinder?
If your setup requires less push power, the adjacent 16mm bore provides 100.5N at 0.5MPa; for heavier demands, the 25mm bore yields 245.4N. Choose this adjustable version when you need on-the-fly end-position tuning without swapping parts; a fixed-stroke ACQ is sufficient if the travel distance never changes. Confirm your ordering essentials: 20mm bore, 35mm full stroke, 20mm adjustment window, magnet (-S), and male rod thread (-B).
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 ACQJ20X35-20SB FAQ
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 full stroke is 35mm with a 20mm adjustment window, giving a usable extend range of 15-35mm.
No, the output force remains identical to a standard ACQ because the piston area is unchanged; the external M8x1.25 stop only limits travel length. The cylinder uses fixed elastomer bumpers for deceleration and the -S magnet works with reed or electronic switches.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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