Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20B 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 ACQJ20X35-20B
The AirTAC ACQJ20X35-20B is a double-acting JIS compact cylinder with a 20mm bore and a 35mm full stroke. An external M8x1.25 threaded stop and lock nut restricts the forward end position, yielding a usable extend span of 15-35mm. The return stroke remains fixed at the original 35mm. Because the piston area stays constant, output force equals a standard ACQ, delivering 157.1N push and 117.8N pull at 0.5MPa.
This variant includes a male M8x1.25 rod end for direct load coupling and uses an M5x0.8 port. It relies on fixed elastomer bumpers for end-of-travel deceleration rather than adjustable air cushions. The body features integrated magnetic-switch grooves, though this specific unit ships without a magnet. Operating speed spans 30-500mm/s across a 0.15-1.0MPa pressure range.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20B |
|---|---|
| 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 ACQJ20X35-20B
| 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 ACQJ20X35-20B Is Used
Product Changeover Stops
Dial in new extend endpoints between 15 and 35mm on packaging lines without swapping out the entire cylinder body.
Trial End Positions
Test clamping depths on assembly fixtures by turning the external stop screw until the exact contact point is found.
Setup-Varying Fixtures
Adapt pressing or holding positions on small pneumatic presses quickly using the lock nut to set the final forward limit.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-20B the Right Cylinder?
If 117.8N retraction at 0.5MPa is insufficient, stepping up to the 25mm bore yields 188.9N pull, while dropping to the 16mm bore offers 75.4N. Choose this 20mm bore when your fixture requires precise on-machine extend depth tuning within a 15-35mm window. If the exact 35mm forward position never varies, a fixed-stroke ACQ20X35 is simpler. To order, confirm the 20mm bore, 35mm full stroke, 20mm adjustment window, male B-thread rod, and note that no magnet is installed.
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 ACQJ20X35-20B FAQ
The usable extend range is 15-35mm (35mm full stroke minus the 20mm window). Force is identical to a standard ACQ20: 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 external M8x1.25 threaded stop mechanically limits forward travel without altering piston area, so force stays unchanged. The retract stroke is unaffected. End-of-travel deceleration relies on fixed elastomer 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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