Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30B 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 ACQJ20X35-30B
The AirTAC ACQJ20X35-30B 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 stroke anywhere from 5 mm up to the full 35 mm directly on your machinery without swapping components. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ bore 20 cylinder, delivering 157.1 N push at 0.5 MPa. This unit includes an M8x1.25 male piston rod end for direct load coupling, a fixed elastomer bumper at each end for end-of-stroke deceleration, and magnetic-switch grooves. It operates on M5x0.8 ports and uses an M8x1.25 external adjuster thread.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30B |
|---|---|
| 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 ACQJ20X35-30B
| 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 ACQJ20X35-30B Is Used
Product Changeover Stops
Quickly dial in new extend end positions during packaging line format changes using the external stop, avoiding the need to fabricate custom spacer rings.
Trial End Positions
Safely test and set precise clamping depths on machining fixtures by adjusting the stroke window from 5 to 35 mm before final lockdown.
Setup-Varying Fixtures
Adapt pressing or holding positions on small automated assembly machines by turning the M8x1.25 adjuster thread to shift the extend limit.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-30B the Right Cylinder?
If you need slightly less force, the adjacent bore 16 yields a 100.5 N push at 0.5 MPa, while the larger bore 25 provides 245.4 N push. Choose this 20 mm bore when your application requires roughly 157 N of push force and variable extend positioning. If your end position never varies, a fixed-stroke ACQ20X35 will suffice. When ordering, confirm the 20 mm bore, 35 mm full stroke, 30 mm window, the male rod thread (-B), and note this specific configuration ships without a 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 ACQJ20X35-30B FAQ
The usable extend range is 5-35 mm (a 35 mm full stroke minus up to a 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 maximum push of 32 kgf at 1.0 MPa.
The external threaded stop and lock nut limit only the extend length, meaning the adjuster changes stroke length but not piston area or force. The cylinder uses a fixed elastomer bumper for deceleration, not an adjustable air cushion. It will not hold a load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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